/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 15:07:56,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 15:07:56,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 15:07:56,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 15:07:56,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2022-01-18 15:07:56,919 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 15:07:56,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 15:07:56,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 15:07:56,920 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 15:07:56,920 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 15:07:56,920 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 15:07:56,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 15:07:56,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 15:07:56,921 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 15:07:56,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 15:07:56,922 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 15:07:56,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 15:07:56,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 15:07:56,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 15:07:56,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 15:07:56,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 15:07:56,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 15:07:56,923 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 15:07:56,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 15:07:56,923 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 15:07:56,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 15:07:56,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 15:07:56,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 15:07:56,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 15:07:56,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 15:07:56,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:07:56,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 15:07:56,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 15:07:56,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 15:07:56,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 15:07:56,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 15:07:56,925 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 15:07:56,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 15:07:56,925 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 15:07:56,925 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 15:07:57,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 15:07:57,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 15:07:57,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 15:07:57,172 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 15:07:57,173 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 15:07:57,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-trans.wvr.bpl [2022-01-18 15:07:57,174 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-trans.wvr.bpl' [2022-01-18 15:07:57,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 15:07:57,199 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 15:07:57,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 15:07:57,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 15:07:57,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 15:07:57,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:07:57" (1/1) ... [2022-01-18 15:07:57,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:07:57" (1/1) ... [2022-01-18 15:07:57,244 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 15:07:57,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 15:07:57,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 15:07:57,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 15:07:57,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 15:07:57,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:07:57" (1/1) ... [2022-01-18 15:07:57,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:07:57" (1/1) ... [2022-01-18 15:07:57,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:07:57" (1/1) ... [2022-01-18 15:07:57,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:07:57" (1/1) ... [2022-01-18 15:07:57,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:07:57" (1/1) ... [2022-01-18 15:07:57,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:07:57" (1/1) ... [2022-01-18 15:07:57,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:07:57" (1/1) ... [2022-01-18 15:07:57,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 15:07:57,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 15:07:57,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 15:07:57,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 15:07:57,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:07:57" (1/1) ... [2022-01-18 15:07:57,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:07:57,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:07:57,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 15:07:57,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 15:07:57,319 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 15:07:57,319 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 15:07:57,319 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 15:07:57,319 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 15:07:57,319 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 15:07:57,319 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 15:07:57,319 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 15:07:57,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 15:07:57,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 15:07:57,320 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 15:07:57,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 15:07:57,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 15:07:57,320 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 15:07:57,363 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 15:07:57,364 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 15:07:57,514 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 15:07:57,596 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 15:07:57,596 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-18 15:07:57,598 INFO L202 PluginConnector]: Adding new model chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:07:57 BoogieIcfgContainer [2022-01-18 15:07:57,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 15:07:57,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 15:07:57,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 15:07:57,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 15:07:57,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:07:57" (1/2) ... [2022-01-18 15:07:57,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f77aee and model type chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 03:07:57, skipping insertion in model container [2022-01-18 15:07:57,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:07:57" (2/2) ... [2022-01-18 15:07:57,619 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-trans.wvr.bpl [2022-01-18 15:07:57,622 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 15:07:57,622 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 15:07:57,623 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 15:07:57,623 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 15:07:57,680 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 15:07:57,724 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 15:07:57,729 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 15:07:57,730 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 15:07:57,737 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2022-01-18 15:07:57,771 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:57,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:07:57,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:07:57,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:07:57,782 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:07:57,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:07:57,786 INFO L85 PathProgramCache]: Analyzing trace with hash 322758138, now seen corresponding path program 1 times [2022-01-18 15:07:57,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:07:57,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50792457] [2022-01-18 15:07:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:07:57,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:07:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:07:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:07:57,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:07:57,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50792457] [2022-01-18 15:07:57,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50792457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:07:57,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:07:57,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:07:57,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490288158] [2022-01-18 15:07:57,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:07:57,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:07:57,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:07:57,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:07:57,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:07:57,958 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:07:58,044 INFO L93 Difference]: Finished difference Result 194 states and 539 transitions. [2022-01-18 15:07:58,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:07:58,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:07:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:07:58,055 INFO L225 Difference]: With dead ends: 194 [2022-01-18 15:07:58,056 INFO L226 Difference]: Without dead ends: 178 [2022-01-18 15:07:58,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:07:58,061 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:07:58,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 16 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:07:58,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-18 15:07:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2022-01-18 15:07:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.8761061946902653) internal successors, (325), 113 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 325 transitions. [2022-01-18 15:07:58,147 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 325 transitions. Word has length 17 [2022-01-18 15:07:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:07:58,147 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 325 transitions. [2022-01-18 15:07:58,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 325 transitions. [2022-01-18 15:07:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:07:58,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:07:58,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:07:58,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 15:07:58,150 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:07:58,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:07:58,151 INFO L85 PathProgramCache]: Analyzing trace with hash 904983988, now seen corresponding path program 2 times [2022-01-18 15:07:58,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:07:58,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289069325] [2022-01-18 15:07:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:07:58,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:07:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:07:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:07:58,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:07:58,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289069325] [2022-01-18 15:07:58,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289069325] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:07:58,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:07:58,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:07:58,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255934038] [2022-01-18 15:07:58,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:07:58,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:07:58,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:07:58,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:07:58,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:07:58,203 INFO L87 Difference]: Start difference. First operand 114 states and 325 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:07:58,254 INFO L93 Difference]: Finished difference Result 193 states and 552 transitions. [2022-01-18 15:07:58,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:07:58,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:07:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:07:58,257 INFO L225 Difference]: With dead ends: 193 [2022-01-18 15:07:58,257 INFO L226 Difference]: Without dead ends: 193 [2022-01-18 15:07:58,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:07:58,259 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:07:58,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 19 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:07:58,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-18 15:07:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 129. [2022-01-18 15:07:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2022-01-18 15:07:58,274 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2022-01-18 15:07:58,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:07:58,274 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2022-01-18 15:07:58,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,275 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2022-01-18 15:07:58,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:07:58,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:07:58,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:07:58,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 15:07:58,277 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:07:58,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:07:58,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1463195370, now seen corresponding path program 3 times [2022-01-18 15:07:58,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:07:58,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221461058] [2022-01-18 15:07:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:07:58,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:07:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:07:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:07:58,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:07:58,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221461058] [2022-01-18 15:07:58,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221461058] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:07:58,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:07:58,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:07:58,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32565658] [2022-01-18 15:07:58,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:07:58,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:07:58,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:07:58,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:07:58,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:07:58,338 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:07:58,400 INFO L93 Difference]: Finished difference Result 238 states and 687 transitions. [2022-01-18 15:07:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:07:58,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:07:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:07:58,403 INFO L225 Difference]: With dead ends: 238 [2022-01-18 15:07:58,403 INFO L226 Difference]: Without dead ends: 238 [2022-01-18 15:07:58,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:07:58,405 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:07:58,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 21 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:07:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-18 15:07:58,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 149. [2022-01-18 15:07:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.939189189189189) internal successors, (435), 148 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 435 transitions. [2022-01-18 15:07:58,419 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 435 transitions. Word has length 17 [2022-01-18 15:07:58,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:07:58,420 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 435 transitions. [2022-01-18 15:07:58,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,420 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 435 transitions. [2022-01-18 15:07:58,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:07:58,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:07:58,422 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:07:58,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 15:07:58,422 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:07:58,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:07:58,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1230707719, now seen corresponding path program 1 times [2022-01-18 15:07:58,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:07:58,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371468083] [2022-01-18 15:07:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:07:58,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:07:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:07:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:07:58,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:07:58,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371468083] [2022-01-18 15:07:58,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371468083] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:07:58,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:07:58,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:07:58,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800330223] [2022-01-18 15:07:58,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:07:58,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:07:58,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:07:58,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:07:58,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:07:58,474 INFO L87 Difference]: Start difference. First operand 149 states and 435 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:07:58,513 INFO L93 Difference]: Finished difference Result 237 states and 697 transitions. [2022-01-18 15:07:58,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 15:07:58,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:07:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:07:58,515 INFO L225 Difference]: With dead ends: 237 [2022-01-18 15:07:58,515 INFO L226 Difference]: Without dead ends: 178 [2022-01-18 15:07:58,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:07:58,517 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:07:58,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 15 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:07:58,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-18 15:07:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-01-18 15:07:58,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9491525423728815) internal successors, (522), 177 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 522 transitions. [2022-01-18 15:07:58,528 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 522 transitions. Word has length 18 [2022-01-18 15:07:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:07:58,529 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 522 transitions. [2022-01-18 15:07:58,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,529 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 522 transitions. [2022-01-18 15:07:58,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:07:58,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:07:58,531 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:07:58,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 15:07:58,531 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:07:58,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:07:58,532 INFO L85 PathProgramCache]: Analyzing trace with hash 170737749, now seen corresponding path program 1 times [2022-01-18 15:07:58,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:07:58,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107983361] [2022-01-18 15:07:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:07:58,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:07:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:07:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:07:58,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:07:58,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107983361] [2022-01-18 15:07:58,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107983361] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:07:58,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:07:58,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:07:58,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902217223] [2022-01-18 15:07:58,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:07:58,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:07:58,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:07:58,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:07:58,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:07:58,580 INFO L87 Difference]: Start difference. First operand 178 states and 522 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:07:58,642 INFO L93 Difference]: Finished difference Result 199 states and 585 transitions. [2022-01-18 15:07:58,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:07:58,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:07:58,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:07:58,645 INFO L225 Difference]: With dead ends: 199 [2022-01-18 15:07:58,645 INFO L226 Difference]: Without dead ends: 199 [2022-01-18 15:07:58,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:07:58,646 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:07:58,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 24 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:07:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-18 15:07:58,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-01-18 15:07:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9545454545454546) internal successors, (585), 198 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 585 transitions. [2022-01-18 15:07:58,657 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 585 transitions. Word has length 19 [2022-01-18 15:07:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:07:58,657 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 585 transitions. [2022-01-18 15:07:58,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 585 transitions. [2022-01-18 15:07:58,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:07:58,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:07:58,659 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:07:58,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 15:07:58,659 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:07:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:07:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1006568847, now seen corresponding path program 2 times [2022-01-18 15:07:58,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:07:58,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26862524] [2022-01-18 15:07:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:07:58,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:07:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:07:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:07:58,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:07:58,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26862524] [2022-01-18 15:07:58,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26862524] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:07:58,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:07:58,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:07:58,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410991753] [2022-01-18 15:07:58,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:07:58,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:07:58,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:07:58,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:07:58,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:07:58,715 INFO L87 Difference]: Start difference. First operand 199 states and 585 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:07:58,800 INFO L93 Difference]: Finished difference Result 303 states and 870 transitions. [2022-01-18 15:07:58,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:07:58,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:07:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:07:58,803 INFO L225 Difference]: With dead ends: 303 [2022-01-18 15:07:58,803 INFO L226 Difference]: Without dead ends: 303 [2022-01-18 15:07:58,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:07:58,805 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:07:58,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 24 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:07:58,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-18 15:07:58,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 206. [2022-01-18 15:07:58,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.9902439024390244) internal successors, (613), 205 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 613 transitions. [2022-01-18 15:07:58,823 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 613 transitions. Word has length 19 [2022-01-18 15:07:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:07:58,824 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 613 transitions. [2022-01-18 15:07:58,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 613 transitions. [2022-01-18 15:07:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:07:58,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:07:58,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:07:58,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 15:07:58,827 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:07:58,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:07:58,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1593484449, now seen corresponding path program 3 times [2022-01-18 15:07:58,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:07:58,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562226156] [2022-01-18 15:07:58,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:07:58,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:07:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:07:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:07:58,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:07:58,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562226156] [2022-01-18 15:07:58,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562226156] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:07:58,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:07:58,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:07:58,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750383704] [2022-01-18 15:07:58,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:07:58,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:07:58,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:07:58,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:07:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:07:58,881 INFO L87 Difference]: Start difference. First operand 206 states and 613 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:07:58,943 INFO L93 Difference]: Finished difference Result 219 states and 632 transitions. [2022-01-18 15:07:58,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:07:58,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:07:58,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:07:58,945 INFO L225 Difference]: With dead ends: 219 [2022-01-18 15:07:58,945 INFO L226 Difference]: Without dead ends: 206 [2022-01-18 15:07:58,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:07:58,946 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:07:58,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 21 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:07:58,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-18 15:07:58,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-01-18 15:07:58,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.9560975609756097) internal successors, (606), 205 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 606 transitions. [2022-01-18 15:07:58,954 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 606 transitions. Word has length 19 [2022-01-18 15:07:58,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:07:58,954 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 606 transitions. [2022-01-18 15:07:58,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 606 transitions. [2022-01-18 15:07:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:07:58,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:07:58,955 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:07:58,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 15:07:58,956 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:07:58,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:07:58,960 INFO L85 PathProgramCache]: Analyzing trace with hash -10747691, now seen corresponding path program 4 times [2022-01-18 15:07:58,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:07:58,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850550419] [2022-01-18 15:07:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:07:58,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:07:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:07:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:07:59,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:07:59,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850550419] [2022-01-18 15:07:59,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850550419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:07:59,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:07:59,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:07:59,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898087115] [2022-01-18 15:07:59,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:07:59,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:07:59,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:07:59,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:07:59,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:07:59,058 INFO L87 Difference]: Start difference. First operand 206 states and 606 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:07:59,162 INFO L93 Difference]: Finished difference Result 301 states and 859 transitions. [2022-01-18 15:07:59,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:07:59,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:07:59,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:07:59,164 INFO L225 Difference]: With dead ends: 301 [2022-01-18 15:07:59,165 INFO L226 Difference]: Without dead ends: 301 [2022-01-18 15:07:59,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:07:59,165 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:07:59,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:07:59,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-18 15:07:59,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 214. [2022-01-18 15:07:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.995305164319249) internal successors, (638), 213 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 638 transitions. [2022-01-18 15:07:59,173 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 638 transitions. Word has length 19 [2022-01-18 15:07:59,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:07:59,173 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 638 transitions. [2022-01-18 15:07:59,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 638 transitions. [2022-01-18 15:07:59,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:07:59,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:07:59,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:07:59,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-18 15:07:59,175 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:07:59,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:07:59,175 INFO L85 PathProgramCache]: Analyzing trace with hash 576167911, now seen corresponding path program 5 times [2022-01-18 15:07:59,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:07:59,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842706207] [2022-01-18 15:07:59,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:07:59,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:07:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:07:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:07:59,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:07:59,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842706207] [2022-01-18 15:07:59,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842706207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:07:59,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:07:59,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:07:59,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57072337] [2022-01-18 15:07:59,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:07:59,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:07:59,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:07:59,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:07:59,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:07:59,231 INFO L87 Difference]: Start difference. First operand 214 states and 638 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:07:59,309 INFO L93 Difference]: Finished difference Result 314 states and 878 transitions. [2022-01-18 15:07:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:07:59,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:07:59,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:07:59,312 INFO L225 Difference]: With dead ends: 314 [2022-01-18 15:07:59,312 INFO L226 Difference]: Without dead ends: 301 [2022-01-18 15:07:59,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:07:59,314 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:07:59,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:07:59,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-18 15:07:59,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 207. [2022-01-18 15:07:59,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.9611650485436893) internal successors, (610), 206 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 610 transitions. [2022-01-18 15:07:59,320 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 610 transitions. Word has length 19 [2022-01-18 15:07:59,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:07:59,321 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 610 transitions. [2022-01-18 15:07:59,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 610 transitions. [2022-01-18 15:07:59,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:07:59,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:07:59,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:07:59,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-18 15:07:59,323 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:07:59,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:07:59,323 INFO L85 PathProgramCache]: Analyzing trace with hash 38312333, now seen corresponding path program 6 times [2022-01-18 15:07:59,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:07:59,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967893598] [2022-01-18 15:07:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:07:59,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:07:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:07:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:07:59,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:07:59,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967893598] [2022-01-18 15:07:59,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967893598] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:07:59,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:07:59,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:07:59,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573741133] [2022-01-18 15:07:59,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:07:59,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:07:59,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:07:59,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:07:59,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:07:59,392 INFO L87 Difference]: Start difference. First operand 207 states and 610 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:07:59,444 INFO L93 Difference]: Finished difference Result 231 states and 656 transitions. [2022-01-18 15:07:59,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:07:59,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:07:59,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:07:59,446 INFO L225 Difference]: With dead ends: 231 [2022-01-18 15:07:59,446 INFO L226 Difference]: Without dead ends: 195 [2022-01-18 15:07:59,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:07:59,447 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:07:59,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 25 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:07:59,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-18 15:07:59,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-01-18 15:07:59,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.922680412371134) internal successors, (567), 194 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2022-01-18 15:07:59,453 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2022-01-18 15:07:59,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:07:59,453 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2022-01-18 15:07:59,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,454 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2022-01-18 15:07:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:07:59,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:07:59,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:07:59,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-18 15:07:59,455 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:07:59,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:07:59,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1791885482, now seen corresponding path program 1 times [2022-01-18 15:07:59,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:07:59,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446893072] [2022-01-18 15:07:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:07:59,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:07:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:07:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:07:59,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:07:59,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446893072] [2022-01-18 15:07:59,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446893072] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:07:59,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:07:59,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:07:59,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016153550] [2022-01-18 15:07:59,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:07:59,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:07:59,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:07:59,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:07:59,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:07:59,513 INFO L87 Difference]: Start difference. First operand 195 states and 567 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:07:59,580 INFO L93 Difference]: Finished difference Result 213 states and 621 transitions. [2022-01-18 15:07:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:07:59,580 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:07:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:07:59,582 INFO L225 Difference]: With dead ends: 213 [2022-01-18 15:07:59,582 INFO L226 Difference]: Without dead ends: 213 [2022-01-18 15:07:59,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:07:59,582 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:07:59,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 32 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:07:59,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-18 15:07:59,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 189. [2022-01-18 15:07:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-01-18 15:07:59,589 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-01-18 15:07:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:07:59,589 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-01-18 15:07:59,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-01-18 15:07:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:07:59,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:07:59,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:07:59,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 15:07:59,591 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:07:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:07:59,591 INFO L85 PathProgramCache]: Analyzing trace with hash 779192950, now seen corresponding path program 2 times [2022-01-18 15:07:59,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:07:59,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917721210] [2022-01-18 15:07:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:07:59,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:07:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:07:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:07:59,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:07:59,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917721210] [2022-01-18 15:07:59,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917721210] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:07:59,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:07:59,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:07:59,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082528071] [2022-01-18 15:07:59,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:07:59,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:07:59,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:07:59,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:07:59,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:07:59,642 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:07:59,709 INFO L93 Difference]: Finished difference Result 231 states and 675 transitions. [2022-01-18 15:07:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:07:59,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:07:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:07:59,711 INFO L225 Difference]: With dead ends: 231 [2022-01-18 15:07:59,711 INFO L226 Difference]: Without dead ends: 231 [2022-01-18 15:07:59,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:07:59,712 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:07:59,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 25 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:07:59,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-18 15:07:59,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 189. [2022-01-18 15:07:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-01-18 15:07:59,719 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-01-18 15:07:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:07:59,719 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-01-18 15:07:59,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:07:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-01-18 15:07:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:07:59,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:07:59,720 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:07:59,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-18 15:07:59,721 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:07:59,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:07:59,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1817075563, now seen corresponding path program 1 times [2022-01-18 15:07:59,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:07:59,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125577220] [2022-01-18 15:07:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:07:59,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:07:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:07:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:07:59,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:07:59,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125577220] [2022-01-18 15:07:59,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125577220] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:07:59,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315257719] [2022-01-18 15:07:59,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:07:59,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:07:59,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:07:59,875 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:07:59,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 15:07:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:07:59,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:07:59,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:00,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:00,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:00,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:00,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:00,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:00,643 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:08:00,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:08:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:00,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315257719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:00,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:00,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:08:00,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158644374] [2022-01-18 15:08:00,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:00,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:08:00,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:00,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:08:00,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:08:00,649 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:01,415 INFO L93 Difference]: Finished difference Result 585 states and 1691 transitions. [2022-01-18 15:08:01,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:08:01,415 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:01,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:01,418 INFO L225 Difference]: With dead ends: 585 [2022-01-18 15:08:01,418 INFO L226 Difference]: Without dead ends: 570 [2022-01-18 15:08:01,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:08:01,420 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:01,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 179 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:08:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-18 15:08:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 235. [2022-01-18 15:08:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.982905982905983) internal successors, (698), 234 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 698 transitions. [2022-01-18 15:08:01,430 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 698 transitions. Word has length 20 [2022-01-18 15:08:01,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:01,430 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 698 transitions. [2022-01-18 15:08:01,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 698 transitions. [2022-01-18 15:08:01,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:01,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:01,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:01,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:01,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 15:08:01,648 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:01,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1958035825, now seen corresponding path program 2 times [2022-01-18 15:08:01,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:01,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020271538] [2022-01-18 15:08:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:01,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:01,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:01,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020271538] [2022-01-18 15:08:01,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020271538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:01,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014287369] [2022-01-18 15:08:01,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:08:01,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:01,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:01,824 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:01,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 15:08:01,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:08:01,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:01,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:01,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:01,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:01,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:02,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:02,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:02,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:02,356 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:08:02,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:08:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:02,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014287369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:02,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:02,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:08:02,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688384040] [2022-01-18 15:08:02,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:02,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:08:02,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:02,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:08:02,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:08:02,364 INFO L87 Difference]: Start difference. First operand 235 states and 698 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:02,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:02,978 INFO L93 Difference]: Finished difference Result 537 states and 1568 transitions. [2022-01-18 15:08:02,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:08:02,979 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:02,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:02,982 INFO L225 Difference]: With dead ends: 537 [2022-01-18 15:08:02,982 INFO L226 Difference]: Without dead ends: 522 [2022-01-18 15:08:02,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:08:02,982 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 120 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:02,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 205 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:08:02,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-01-18 15:08:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 243. [2022-01-18 15:08:02,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 3.0) internal successors, (726), 242 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 726 transitions. [2022-01-18 15:08:02,993 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 726 transitions. Word has length 20 [2022-01-18 15:08:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:02,993 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 726 transitions. [2022-01-18 15:08:02,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 726 transitions. [2022-01-18 15:08:02,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:02,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:02,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:03,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:03,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 15:08:03,208 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:03,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:03,208 INFO L85 PathProgramCache]: Analyzing trace with hash -257637643, now seen corresponding path program 3 times [2022-01-18 15:08:03,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:03,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693423291] [2022-01-18 15:08:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:03,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:03,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:03,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693423291] [2022-01-18 15:08:03,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693423291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:03,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332455925] [2022-01-18 15:08:03,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:08:03,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:03,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:03,384 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:03,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 15:08:03,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:08:03,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:03,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:03,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:03,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:03,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:03,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:03,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:03,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:03,875 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:08:03,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:08:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:03,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332455925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:03,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:03,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:08:03,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250261294] [2022-01-18 15:08:03,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:03,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:08:03,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:03,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:08:03,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:08:03,881 INFO L87 Difference]: Start difference. First operand 243 states and 726 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:04,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:04,429 INFO L93 Difference]: Finished difference Result 549 states and 1598 transitions. [2022-01-18 15:08:04,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:08:04,430 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:04,432 INFO L225 Difference]: With dead ends: 549 [2022-01-18 15:08:04,432 INFO L226 Difference]: Without dead ends: 534 [2022-01-18 15:08:04,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:08:04,435 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 142 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:04,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 149 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:08:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-18 15:08:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 239. [2022-01-18 15:08:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.9831932773109244) internal successors, (710), 238 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 710 transitions. [2022-01-18 15:08:04,444 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 710 transitions. Word has length 20 [2022-01-18 15:08:04,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:04,444 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 710 transitions. [2022-01-18 15:08:04,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 710 transitions. [2022-01-18 15:08:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:04,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:04,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:04,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:04,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:04,652 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:04,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1888533117, now seen corresponding path program 4 times [2022-01-18 15:08:04,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:04,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447503215] [2022-01-18 15:08:04,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:04,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:04,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:04,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447503215] [2022-01-18 15:08:04,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447503215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:04,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478888149] [2022-01-18 15:08:04,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:08:04,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:04,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:04,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:04,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 15:08:04,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:08:04,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:04,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:04,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:04,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:04,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:08:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:04,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:05,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:05,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:08:05,269 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:08:05,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:08:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:05,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478888149] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:05,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:05,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:08:05,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556909859] [2022-01-18 15:08:05,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:05,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:08:05,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:05,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:08:05,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:08:05,275 INFO L87 Difference]: Start difference. First operand 239 states and 710 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:05,740 INFO L93 Difference]: Finished difference Result 503 states and 1466 transitions. [2022-01-18 15:08:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:08:05,740 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:05,743 INFO L225 Difference]: With dead ends: 503 [2022-01-18 15:08:05,743 INFO L226 Difference]: Without dead ends: 488 [2022-01-18 15:08:05,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:08:05,743 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:05,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 188 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:08:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-18 15:08:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 252. [2022-01-18 15:08:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9800796812749004) internal successors, (748), 251 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 748 transitions. [2022-01-18 15:08:05,754 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 748 transitions. Word has length 20 [2022-01-18 15:08:05,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:05,754 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 748 transitions. [2022-01-18 15:08:05,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 748 transitions. [2022-01-18 15:08:05,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:05,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:05,755 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:05,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:05,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 15:08:05,976 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:05,976 INFO L85 PathProgramCache]: Analyzing trace with hash 485994219, now seen corresponding path program 5 times [2022-01-18 15:08:05,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:05,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661584064] [2022-01-18 15:08:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:05,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:06,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:06,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661584064] [2022-01-18 15:08:06,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661584064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:06,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241797804] [2022-01-18 15:08:06,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:08:06,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:06,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:06,108 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:06,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 15:08:06,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:08:06,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:06,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:06,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:06,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:06,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:06,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:06,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:06,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:06,657 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:08:06,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:08:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:06,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241797804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:06,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:06,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:08:06,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034748981] [2022-01-18 15:08:06,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:06,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:08:06,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:06,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:08:06,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:08:06,662 INFO L87 Difference]: Start difference. First operand 252 states and 748 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:07,205 INFO L93 Difference]: Finished difference Result 574 states and 1677 transitions. [2022-01-18 15:08:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:08:07,205 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:07,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:07,208 INFO L225 Difference]: With dead ends: 574 [2022-01-18 15:08:07,208 INFO L226 Difference]: Without dead ends: 559 [2022-01-18 15:08:07,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:08:07,209 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 109 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:07,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 234 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:08:07,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-18 15:08:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 267. [2022-01-18 15:08:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.9962406015037595) internal successors, (797), 266 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 797 transitions. [2022-01-18 15:08:07,217 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 797 transitions. Word has length 20 [2022-01-18 15:08:07,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:07,217 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 797 transitions. [2022-01-18 15:08:07,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 797 transitions. [2022-01-18 15:08:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:07,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:07,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:07,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:07,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 15:08:07,431 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:07,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1729679249, now seen corresponding path program 6 times [2022-01-18 15:08:07,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:07,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791152453] [2022-01-18 15:08:07,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:07,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:07,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:07,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791152453] [2022-01-18 15:08:07,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791152453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:07,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311773258] [2022-01-18 15:08:07,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:08:07,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:07,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:07,583 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:07,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 15:08:07,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:08:07,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:07,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:07,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:07,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:07,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:07,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:08,019 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:08:08,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:08:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:08,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311773258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:08,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:08,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:08:08,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139512647] [2022-01-18 15:08:08,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:08,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:08:08,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:08,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:08:08,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:08:08,024 INFO L87 Difference]: Start difference. First operand 267 states and 797 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:08,659 INFO L93 Difference]: Finished difference Result 586 states and 1707 transitions. [2022-01-18 15:08:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:08:08,659 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:08,661 INFO L225 Difference]: With dead ends: 586 [2022-01-18 15:08:08,661 INFO L226 Difference]: Without dead ends: 571 [2022-01-18 15:08:08,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:08:08,662 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:08,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 267 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:08:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-18 15:08:08,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 263. [2022-01-18 15:08:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.980916030534351) internal successors, (781), 262 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:08,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 781 transitions. [2022-01-18 15:08:08,670 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 781 transitions. Word has length 20 [2022-01-18 15:08:08,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:08,670 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 781 transitions. [2022-01-18 15:08:08,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:08,671 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 781 transitions. [2022-01-18 15:08:08,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:08,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:08,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:08,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:08,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 15:08:08,887 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:08,887 INFO L85 PathProgramCache]: Analyzing trace with hash 416491511, now seen corresponding path program 7 times [2022-01-18 15:08:08,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:08,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492372850] [2022-01-18 15:08:08,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:08,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:09,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:09,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492372850] [2022-01-18 15:08:09,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492372850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:09,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298266786] [2022-01-18 15:08:09,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:08:09,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:09,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:09,014 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:09,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 15:08:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:09,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:09,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:08:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:09,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:09,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:09,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:08:09,429 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:08:09,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:08:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:09,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298266786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:09,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:09,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:08:09,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530497501] [2022-01-18 15:08:09,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:09,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:08:09,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:09,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:08:09,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:08:09,438 INFO L87 Difference]: Start difference. First operand 263 states and 781 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:09,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:09,962 INFO L93 Difference]: Finished difference Result 530 states and 1547 transitions. [2022-01-18 15:08:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:08:09,962 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:09,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:09,965 INFO L225 Difference]: With dead ends: 530 [2022-01-18 15:08:09,965 INFO L226 Difference]: Without dead ends: 515 [2022-01-18 15:08:09,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:08:09,966 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 82 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:09,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 232 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:08:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-18 15:08:09,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 259. [2022-01-18 15:08:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.9806201550387597) internal successors, (769), 258 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 769 transitions. [2022-01-18 15:08:09,979 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 769 transitions. Word has length 20 [2022-01-18 15:08:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:09,980 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 769 transitions. [2022-01-18 15:08:09,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:09,980 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 769 transitions. [2022-01-18 15:08:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:09,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:09,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:10,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:10,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:10,196 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:10,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:10,196 INFO L85 PathProgramCache]: Analyzing trace with hash -677600077, now seen corresponding path program 8 times [2022-01-18 15:08:10,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:10,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215654451] [2022-01-18 15:08:10,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:10,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:10,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:10,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215654451] [2022-01-18 15:08:10,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215654451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:10,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393589598] [2022-01-18 15:08:10,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:08:10,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:10,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:10,309 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:10,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 15:08:10,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:08:10,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:10,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:10,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:10,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:10,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:08:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:10,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:10,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:10,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:10,713 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:08:10,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:08:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:10,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393589598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:10,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:10,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:08:10,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987918855] [2022-01-18 15:08:10,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:10,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:08:10,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:10,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:08:10,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:08:10,718 INFO L87 Difference]: Start difference. First operand 259 states and 769 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:11,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:11,222 INFO L93 Difference]: Finished difference Result 613 states and 1780 transitions. [2022-01-18 15:08:11,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:08:11,222 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:11,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:11,225 INFO L225 Difference]: With dead ends: 613 [2022-01-18 15:08:11,225 INFO L226 Difference]: Without dead ends: 598 [2022-01-18 15:08:11,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:08:11,226 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 151 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:11,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 193 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:08:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-01-18 15:08:11,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 281. [2022-01-18 15:08:11,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.9785714285714286) internal successors, (834), 280 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 834 transitions. [2022-01-18 15:08:11,237 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 834 transitions. Word has length 20 [2022-01-18 15:08:11,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:11,238 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 834 transitions. [2022-01-18 15:08:11,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:11,238 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 834 transitions. [2022-01-18 15:08:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:11,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:11,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:11,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:11,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:11,461 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:11,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:11,462 INFO L85 PathProgramCache]: Analyzing trace with hash -356903725, now seen corresponding path program 9 times [2022-01-18 15:08:11,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:11,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244602101] [2022-01-18 15:08:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:11,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:11,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:11,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244602101] [2022-01-18 15:08:11,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244602101] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:11,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329720713] [2022-01-18 15:08:11,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:08:11,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:11,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:11,608 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:11,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 15:08:11,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:08:11,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:11,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:11,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:11,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:11,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:11,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:11,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:11,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:12,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:12,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:12,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:12,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:12,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:12,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:12,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329720713] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:12,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:12,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:12,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735339697] [2022-01-18 15:08:12,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:12,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:12,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:12,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:12,159 INFO L87 Difference]: Start difference. First operand 281 states and 834 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:13,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:13,166 INFO L93 Difference]: Finished difference Result 667 states and 1938 transitions. [2022-01-18 15:08:13,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:08:13,166 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:13,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:13,169 INFO L225 Difference]: With dead ends: 667 [2022-01-18 15:08:13,169 INFO L226 Difference]: Without dead ends: 637 [2022-01-18 15:08:13,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=334, Invalid=1388, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:08:13,171 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 156 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:13,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 237 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 603 Invalid, 0 Unknown, 354 Unchecked, 0.3s Time] [2022-01-18 15:08:13,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-18 15:08:13,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 285. [2022-01-18 15:08:13,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.9788732394366195) internal successors, (846), 284 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 846 transitions. [2022-01-18 15:08:13,181 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 846 transitions. Word has length 20 [2022-01-18 15:08:13,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:13,181 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 846 transitions. [2022-01-18 15:08:13,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:13,181 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 846 transitions. [2022-01-18 15:08:13,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:13,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:13,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:13,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:13,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:13,395 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:13,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:13,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1995363379, now seen corresponding path program 10 times [2022-01-18 15:08:13,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:13,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56428196] [2022-01-18 15:08:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:13,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:13,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:13,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56428196] [2022-01-18 15:08:13,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56428196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:13,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892551559] [2022-01-18 15:08:13,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:08:13,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:13,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:13,546 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:13,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 15:08:13,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:08:13,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:13,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:13,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:13,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:13,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:13,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:13,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:13,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:13,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:13,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:14,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:14,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:14,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:14,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:14,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892551559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:14,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:14,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:14,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474135897] [2022-01-18 15:08:14,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:14,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:14,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:14,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:14,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:14,128 INFO L87 Difference]: Start difference. First operand 285 states and 846 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:14,816 INFO L93 Difference]: Finished difference Result 528 states and 1545 transitions. [2022-01-18 15:08:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:08:14,816 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:14,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:14,819 INFO L225 Difference]: With dead ends: 528 [2022-01-18 15:08:14,819 INFO L226 Difference]: Without dead ends: 498 [2022-01-18 15:08:14,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:08:14,820 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 146 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:14,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 233 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 694 Invalid, 0 Unknown, 138 Unchecked, 0.3s Time] [2022-01-18 15:08:14,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-18 15:08:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 289. [2022-01-18 15:08:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.9791666666666665) internal successors, (858), 288 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 858 transitions. [2022-01-18 15:08:14,828 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 858 transitions. Word has length 20 [2022-01-18 15:08:14,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:14,828 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 858 transitions. [2022-01-18 15:08:14,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:14,828 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 858 transitions. [2022-01-18 15:08:14,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:14,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:14,829 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:14,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:15,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-18 15:08:15,043 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:15,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:15,044 INFO L85 PathProgramCache]: Analyzing trace with hash 997300179, now seen corresponding path program 11 times [2022-01-18 15:08:15,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:15,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443722299] [2022-01-18 15:08:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:15,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:15,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:15,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443722299] [2022-01-18 15:08:15,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443722299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:15,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680627411] [2022-01-18 15:08:15,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:08:15,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:15,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:15,216 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:15,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 15:08:15,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:08:15,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:15,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:15,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:15,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:15,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:15,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:15,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:15,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:15,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:15,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:15,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:15,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:15,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:15,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:15,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:15,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680627411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:15,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:15,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:15,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400119080] [2022-01-18 15:08:15,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:15,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:15,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:15,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:15,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:15,752 INFO L87 Difference]: Start difference. First operand 289 states and 858 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:16,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:16,520 INFO L93 Difference]: Finished difference Result 491 states and 1449 transitions. [2022-01-18 15:08:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:08:16,520 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:16,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:16,523 INFO L225 Difference]: With dead ends: 491 [2022-01-18 15:08:16,523 INFO L226 Difference]: Without dead ends: 476 [2022-01-18 15:08:16,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:08:16,523 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 95 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:16,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 210 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:08:16,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-18 15:08:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 301. [2022-01-18 15:08:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.98) internal successors, (894), 300 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 894 transitions. [2022-01-18 15:08:16,537 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 894 transitions. Word has length 20 [2022-01-18 15:08:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:16,537 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 894 transitions. [2022-01-18 15:08:16,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 894 transitions. [2022-01-18 15:08:16,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:16,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:16,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:16,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:16,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 15:08:16,766 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1270231183, now seen corresponding path program 12 times [2022-01-18 15:08:16,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:16,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659083174] [2022-01-18 15:08:16,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:16,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:16,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:16,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659083174] [2022-01-18 15:08:16,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659083174] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:16,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771823233] [2022-01-18 15:08:16,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:08:16,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:16,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:16,936 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:16,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 15:08:16,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:08:16,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:16,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:16,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:17,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:17,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:17,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:17,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:17,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:17,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:17,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:17,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:17,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:17,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771823233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:17,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:17,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:17,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702568167] [2022-01-18 15:08:17,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:17,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:17,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:17,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:17,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:17,404 INFO L87 Difference]: Start difference. First operand 301 states and 894 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:18,334 INFO L93 Difference]: Finished difference Result 692 states and 2008 transitions. [2022-01-18 15:08:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:08:18,334 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:18,337 INFO L225 Difference]: With dead ends: 692 [2022-01-18 15:08:18,337 INFO L226 Difference]: Without dead ends: 677 [2022-01-18 15:08:18,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:08:18,338 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 202 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:18,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 217 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:08:18,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-18 15:08:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 301. [2022-01-18 15:08:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.98) internal successors, (894), 300 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 894 transitions. [2022-01-18 15:08:18,348 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 894 transitions. Word has length 20 [2022-01-18 15:08:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:18,348 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 894 transitions. [2022-01-18 15:08:18,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 894 transitions. [2022-01-18 15:08:18,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:18,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:18,349 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:18,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:18,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 15:08:18,563 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1276978829, now seen corresponding path program 13 times [2022-01-18 15:08:18,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:18,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487046333] [2022-01-18 15:08:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:18,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:18,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:18,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487046333] [2022-01-18 15:08:18,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487046333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:18,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697338628] [2022-01-18 15:08:18,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:08:18,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:18,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:18,728 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:18,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 15:08:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:18,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:18,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:18,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:19,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:19,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:19,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:19,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:19,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:19,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:19,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:19,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:19,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:19,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:19,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:19,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697338628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:19,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:19,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:19,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647385980] [2022-01-18 15:08:19,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:19,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:19,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:19,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:19,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:19,352 INFO L87 Difference]: Start difference. First operand 301 states and 894 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:20,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:20,027 INFO L93 Difference]: Finished difference Result 593 states and 1700 transitions. [2022-01-18 15:08:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:08:20,027 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:20,030 INFO L225 Difference]: With dead ends: 593 [2022-01-18 15:08:20,030 INFO L226 Difference]: Without dead ends: 548 [2022-01-18 15:08:20,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:08:20,031 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 132 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:20,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 222 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 722 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-01-18 15:08:20,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-18 15:08:20,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 305. [2022-01-18 15:08:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9934210526315788) internal successors, (910), 304 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 910 transitions. [2022-01-18 15:08:20,040 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 910 transitions. Word has length 20 [2022-01-18 15:08:20,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:20,040 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 910 transitions. [2022-01-18 15:08:20,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:20,040 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 910 transitions. [2022-01-18 15:08:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:20,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:20,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:20,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:20,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-18 15:08:20,251 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:20,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:20,252 INFO L85 PathProgramCache]: Analyzing trace with hash 970633523, now seen corresponding path program 14 times [2022-01-18 15:08:20,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:20,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306503423] [2022-01-18 15:08:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:20,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:20,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:20,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306503423] [2022-01-18 15:08:20,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306503423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:20,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849630973] [2022-01-18 15:08:20,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:08:20,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:20,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:20,404 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:20,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 15:08:20,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:08:20,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:20,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:20,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:20,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:20,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:20,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:20,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:20,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:20,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:20,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:20,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:20,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:20,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:20,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:20,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:20,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849630973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:20,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:20,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:20,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828914776] [2022-01-18 15:08:20,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:20,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:20,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:20,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:20,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:20,950 INFO L87 Difference]: Start difference. First operand 305 states and 910 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:21,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:21,509 INFO L93 Difference]: Finished difference Result 561 states and 1637 transitions. [2022-01-18 15:08:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:08:21,510 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:21,512 INFO L225 Difference]: With dead ends: 561 [2022-01-18 15:08:21,512 INFO L226 Difference]: Without dead ends: 531 [2022-01-18 15:08:21,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:08:21,512 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 110 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:21,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 189 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 606 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-01-18 15:08:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-18 15:08:21,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 305. [2022-01-18 15:08:21,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9934210526315788) internal successors, (910), 304 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:21,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 910 transitions. [2022-01-18 15:08:21,520 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 910 transitions. Word has length 20 [2022-01-18 15:08:21,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:21,520 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 910 transitions. [2022-01-18 15:08:21,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:21,520 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 910 transitions. [2022-01-18 15:08:21,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:21,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:21,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:21,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:21,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:21,735 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:21,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:21,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1543838351, now seen corresponding path program 15 times [2022-01-18 15:08:21,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:21,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080614625] [2022-01-18 15:08:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:21,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:21,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:21,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080614625] [2022-01-18 15:08:21,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080614625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:21,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961563782] [2022-01-18 15:08:21,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:08:21,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:21,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:21,868 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:21,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 15:08:21,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:08:21,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:21,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:21,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:21,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:21,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:22,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:22,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:22,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:22,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:22,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:22,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:22,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:22,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961563782] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:22,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:22,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 18 [2022-01-18 15:08:22,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496345275] [2022-01-18 15:08:22,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:22,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:08:22,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:22,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:08:22,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:08:22,349 INFO L87 Difference]: Start difference. First operand 305 states and 910 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:22,908 INFO L93 Difference]: Finished difference Result 486 states and 1433 transitions. [2022-01-18 15:08:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:08:22,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:22,910 INFO L225 Difference]: With dead ends: 486 [2022-01-18 15:08:22,910 INFO L226 Difference]: Without dead ends: 471 [2022-01-18 15:08:22,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:08:22,911 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 74 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:22,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 137 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:08:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-18 15:08:22,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 305. [2022-01-18 15:08:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9934210526315788) internal successors, (910), 304 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 910 transitions. [2022-01-18 15:08:22,918 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 910 transitions. Word has length 20 [2022-01-18 15:08:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:22,918 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 910 transitions. [2022-01-18 15:08:22,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 910 transitions. [2022-01-18 15:08:22,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:22,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:22,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:22,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:23,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 15:08:23,142 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:23,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:23,142 INFO L85 PathProgramCache]: Analyzing trace with hash 332106461, now seen corresponding path program 16 times [2022-01-18 15:08:23,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:23,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095180289] [2022-01-18 15:08:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:23,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:23,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:23,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095180289] [2022-01-18 15:08:23,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095180289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:23,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805195960] [2022-01-18 15:08:23,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:08:23,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:23,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:23,267 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:23,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 15:08:23,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:08:23,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:23,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:23,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:23,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:23,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:23,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:23,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:23,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:23,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:23,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:08:23,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:23,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:23,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805195960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:23,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:23,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:08:23,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678514688] [2022-01-18 15:08:23,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:23,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:08:23,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:08:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:08:23,683 INFO L87 Difference]: Start difference. First operand 305 states and 910 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:24,204 INFO L93 Difference]: Finished difference Result 601 states and 1749 transitions. [2022-01-18 15:08:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:08:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:24,207 INFO L225 Difference]: With dead ends: 601 [2022-01-18 15:08:24,207 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 15:08:24,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:08:24,208 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 188 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:24,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 179 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:08:24,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 15:08:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 309. [2022-01-18 15:08:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9935064935064934) internal successors, (922), 308 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2022-01-18 15:08:24,216 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2022-01-18 15:08:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:24,216 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2022-01-18 15:08:24,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2022-01-18 15:08:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:24,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:24,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:24,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:24,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 15:08:24,435 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash 473066723, now seen corresponding path program 17 times [2022-01-18 15:08:24,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:24,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313547871] [2022-01-18 15:08:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:24,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:24,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:24,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313547871] [2022-01-18 15:08:24,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313547871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:24,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318874515] [2022-01-18 15:08:24,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:08:24,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:24,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:24,576 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:24,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 15:08:24,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:08:24,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:24,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:24,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:24,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:24,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:24,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:24,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:24,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:24,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:24,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:08:24,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:24,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:25,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318874515] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:25,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:25,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:08:25,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112764703] [2022-01-18 15:08:25,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:25,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:08:25,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:25,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:08:25,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:08:25,009 INFO L87 Difference]: Start difference. First operand 309 states and 922 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:25,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:25,388 INFO L93 Difference]: Finished difference Result 569 states and 1645 transitions. [2022-01-18 15:08:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:08:25,389 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:25,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:25,391 INFO L225 Difference]: With dead ends: 569 [2022-01-18 15:08:25,391 INFO L226 Difference]: Without dead ends: 539 [2022-01-18 15:08:25,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:08:25,392 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:25,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 155 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:08:25,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-18 15:08:25,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 317. [2022-01-18 15:08:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.0063291139240507) internal successors, (950), 316 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:25,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 950 transitions. [2022-01-18 15:08:25,400 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 950 transitions. Word has length 20 [2022-01-18 15:08:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:25,400 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 950 transitions. [2022-01-18 15:08:25,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 950 transitions. [2022-01-18 15:08:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:25,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:25,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:25,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:25,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 15:08:25,611 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:25,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:25,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1742606745, now seen corresponding path program 18 times [2022-01-18 15:08:25,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:25,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340172991] [2022-01-18 15:08:25,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:25,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:25,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:25,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340172991] [2022-01-18 15:08:25,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340172991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:25,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297994252] [2022-01-18 15:08:25,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:08:25,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:25,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:25,746 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:25,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 15:08:25,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:08:25,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:25,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:25,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:25,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:25,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:25,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:26,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:26,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:26,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:26,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:08:26,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:26,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:26,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297994252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:26,237 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:26,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:08:26,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737005081] [2022-01-18 15:08:26,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:26,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:08:26,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:26,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:08:26,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:08:26,239 INFO L87 Difference]: Start difference. First operand 317 states and 950 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:26,614 INFO L93 Difference]: Finished difference Result 587 states and 1688 transitions. [2022-01-18 15:08:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:08:26,614 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:26,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:26,616 INFO L225 Difference]: With dead ends: 587 [2022-01-18 15:08:26,616 INFO L226 Difference]: Without dead ends: 557 [2022-01-18 15:08:26,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:08:26,618 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:26,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 175 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:08:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-18 15:08:26,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 313. [2022-01-18 15:08:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.9935897435897436) internal successors, (934), 312 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:26,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 934 transitions. [2022-01-18 15:08:26,627 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 934 transitions. Word has length 20 [2022-01-18 15:08:26,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:26,627 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 934 transitions. [2022-01-18 15:08:26,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:26,627 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 934 transitions. [2022-01-18 15:08:26,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:26,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:26,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:26,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:26,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:26,843 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:26,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:26,844 INFO L85 PathProgramCache]: Analyzing trace with hash 403564015, now seen corresponding path program 19 times [2022-01-18 15:08:26,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:26,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653650199] [2022-01-18 15:08:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:26,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:26,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:26,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653650199] [2022-01-18 15:08:26,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653650199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:26,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910488282] [2022-01-18 15:08:26,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:08:26,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:26,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:26,967 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:26,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 15:08:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:26,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:26,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:27,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:27,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:08:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:27,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:27,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:27,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:08:27,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:27,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:08:27,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:27,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:27,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910488282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:27,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:27,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:08:27,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673746265] [2022-01-18 15:08:27,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:27,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:08:27,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:08:27,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:08:27,364 INFO L87 Difference]: Start difference. First operand 313 states and 934 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:27,661 INFO L93 Difference]: Finished difference Result 507 states and 1477 transitions. [2022-01-18 15:08:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:08:27,661 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:27,663 INFO L225 Difference]: With dead ends: 507 [2022-01-18 15:08:27,663 INFO L226 Difference]: Without dead ends: 477 [2022-01-18 15:08:27,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:08:27,664 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 55 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:27,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 184 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:08:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-18 15:08:27,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 305. [2022-01-18 15:08:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9934210526315788) internal successors, (910), 304 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:27,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 910 transitions. [2022-01-18 15:08:27,670 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 910 transitions. Word has length 20 [2022-01-18 15:08:27,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:27,670 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 910 transitions. [2022-01-18 15:08:27,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:27,670 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 910 transitions. [2022-01-18 15:08:27,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:27,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:27,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:27,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:27,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:27,891 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:27,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:27,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1526750339, now seen corresponding path program 20 times [2022-01-18 15:08:27,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:27,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795419535] [2022-01-18 15:08:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:27,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:28,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:28,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795419535] [2022-01-18 15:08:28,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795419535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:28,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945683977] [2022-01-18 15:08:28,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:08:28,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:28,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:28,107 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:28,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 15:08:28,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:08:28,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:28,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:28,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:28,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:28,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:28,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:28,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:28,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:28,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:28,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:28,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:28,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:28,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:28,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:28,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:28,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:28,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945683977] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:28,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:28,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:28,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30739193] [2022-01-18 15:08:28,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:28,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:28,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:28,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:28,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:28,704 INFO L87 Difference]: Start difference. First operand 305 states and 910 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:28,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:28,917 INFO L93 Difference]: Finished difference Result 513 states and 1516 transitions. [2022-01-18 15:08:28,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:08:28,917 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:28,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:28,919 INFO L225 Difference]: With dead ends: 513 [2022-01-18 15:08:28,919 INFO L226 Difference]: Without dead ends: 498 [2022-01-18 15:08:28,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:08:28,920 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:28,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 209 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 399 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-01-18 15:08:28,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-18 15:08:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 314. [2022-01-18 15:08:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.9968051118210863) internal successors, (938), 313 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 938 transitions. [2022-01-18 15:08:28,949 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 938 transitions. Word has length 20 [2022-01-18 15:08:28,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:28,950 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 938 transitions. [2022-01-18 15:08:28,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:28,950 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 938 transitions. [2022-01-18 15:08:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:28,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:28,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:28,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:29,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-18 15:08:29,163 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:29,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:29,164 INFO L85 PathProgramCache]: Analyzing trace with hash 749866083, now seen corresponding path program 21 times [2022-01-18 15:08:29,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:29,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341652266] [2022-01-18 15:08:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:29,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:29,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:29,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341652266] [2022-01-18 15:08:29,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341652266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:29,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317447046] [2022-01-18 15:08:29,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:08:29,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:29,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:29,343 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:29,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 15:08:29,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:08:29,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:29,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:29,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:29,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:29,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:29,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:29,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:29,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:29,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:29,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:29,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:29,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:29,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:29,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:29,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:29,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317447046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:29,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:29,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:29,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578082340] [2022-01-18 15:08:29,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:29,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:29,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:29,802 INFO L87 Difference]: Start difference. First operand 314 states and 938 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:30,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:30,199 INFO L93 Difference]: Finished difference Result 568 states and 1651 transitions. [2022-01-18 15:08:30,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:08:30,199 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:30,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:30,201 INFO L225 Difference]: With dead ends: 568 [2022-01-18 15:08:30,201 INFO L226 Difference]: Without dead ends: 538 [2022-01-18 15:08:30,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:08:30,202 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:30,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 243 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:08:30,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-01-18 15:08:30,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 303. [2022-01-18 15:08:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9966887417218544) internal successors, (905), 302 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:30,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 905 transitions. [2022-01-18 15:08:30,209 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 905 transitions. Word has length 20 [2022-01-18 15:08:30,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:30,209 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 905 transitions. [2022-01-18 15:08:30,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:30,209 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 905 transitions. [2022-01-18 15:08:30,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:30,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:30,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:30,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-18 15:08:30,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 15:08:30,432 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:30,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:30,432 INFO L85 PathProgramCache]: Analyzing trace with hash -470739545, now seen corresponding path program 22 times [2022-01-18 15:08:30,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:30,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703272716] [2022-01-18 15:08:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:30,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:30,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:30,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703272716] [2022-01-18 15:08:30,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703272716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:30,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877508498] [2022-01-18 15:08:30,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:08:30,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:30,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:30,620 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:30,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 15:08:30,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:08:30,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:30,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:30,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:30,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:30,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:30,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:30,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:30,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:30,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:31,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:31,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:31,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:31,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:31,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:31,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:31,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877508498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:31,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:31,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:31,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686458355] [2022-01-18 15:08:31,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:31,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:31,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:31,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:31,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:31,285 INFO L87 Difference]: Start difference. First operand 303 states and 905 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:31,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:31,581 INFO L93 Difference]: Finished difference Result 557 states and 1595 transitions. [2022-01-18 15:08:31,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:08:31,581 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:31,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:31,583 INFO L225 Difference]: With dead ends: 557 [2022-01-18 15:08:31,583 INFO L226 Difference]: Without dead ends: 527 [2022-01-18 15:08:31,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:08:31,583 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:31,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 154 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 357 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-01-18 15:08:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-18 15:08:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 299. [2022-01-18 15:08:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.9832214765100673) internal successors, (889), 298 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 889 transitions. [2022-01-18 15:08:31,590 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 889 transitions. Word has length 20 [2022-01-18 15:08:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:31,590 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 889 transitions. [2022-01-18 15:08:31,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:31,590 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 889 transitions. [2022-01-18 15:08:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:31,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:31,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:31,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:31,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:31,792 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:31,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:31,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1753971719, now seen corresponding path program 23 times [2022-01-18 15:08:31,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:31,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303860602] [2022-01-18 15:08:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:31,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:31,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:31,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303860602] [2022-01-18 15:08:31,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303860602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:31,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400241195] [2022-01-18 15:08:31,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:08:31,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:31,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:31,956 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:31,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 15:08:31,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:08:31,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:31,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:31,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:32,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:32,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:32,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:32,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:32,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:32,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:32,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:32,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:32,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:32,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:32,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:32,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:32,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400241195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:32,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:32,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:32,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440084622] [2022-01-18 15:08:32,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:32,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:32,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:32,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:32,497 INFO L87 Difference]: Start difference. First operand 299 states and 889 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:32,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:32,847 INFO L93 Difference]: Finished difference Result 495 states and 1452 transitions. [2022-01-18 15:08:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:08:32,847 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:32,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:32,849 INFO L225 Difference]: With dead ends: 495 [2022-01-18 15:08:32,849 INFO L226 Difference]: Without dead ends: 480 [2022-01-18 15:08:32,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:08:32,849 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:32,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 194 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:08:32,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-01-18 15:08:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 302. [2022-01-18 15:08:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.993355481727575) internal successors, (901), 301 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 901 transitions. [2022-01-18 15:08:32,856 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 901 transitions. Word has length 20 [2022-01-18 15:08:32,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:32,857 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 901 transitions. [2022-01-18 15:08:32,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:32,857 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 901 transitions. [2022-01-18 15:08:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:32,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:32,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:32,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 15:08:33,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:33,071 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:33,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1944889661, now seen corresponding path program 24 times [2022-01-18 15:08:33,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:33,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366990512] [2022-01-18 15:08:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:33,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:33,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:33,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366990512] [2022-01-18 15:08:33,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366990512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:33,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846987047] [2022-01-18 15:08:33,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:08:33,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:33,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:33,246 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:33,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 15:08:33,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:08:33,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:33,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:33,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:33,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:33,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:33,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:33,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:33,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:33,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:33,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:33,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:33,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:33,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:33,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:33,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:33,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:33,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846987047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:33,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:33,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:33,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480354143] [2022-01-18 15:08:33,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:33,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:33,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:33,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:33,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:33,751 INFO L87 Difference]: Start difference. First operand 302 states and 901 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:34,128 INFO L93 Difference]: Finished difference Result 497 states and 1454 transitions. [2022-01-18 15:08:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:08:34,128 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:34,130 INFO L225 Difference]: With dead ends: 497 [2022-01-18 15:08:34,130 INFO L226 Difference]: Without dead ends: 467 [2022-01-18 15:08:34,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:08:34,131 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:34,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 185 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 624 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-01-18 15:08:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-18 15:08:34,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 298. [2022-01-18 15:08:34,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2022-01-18 15:08:34,141 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2022-01-18 15:08:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:34,141 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2022-01-18 15:08:34,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:34,141 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2022-01-18 15:08:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:34,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:34,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:34,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:34,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 15:08:34,364 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:34,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:34,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1438661017, now seen corresponding path program 25 times [2022-01-18 15:08:34,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:34,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142447430] [2022-01-18 15:08:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:34,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:34,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:34,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142447430] [2022-01-18 15:08:34,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142447430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:34,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657483955] [2022-01-18 15:08:34,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:08:34,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:34,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:34,494 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:34,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 15:08:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:34,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:34,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:34,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:34,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:34,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:34,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:34,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:34,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:34,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:34,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:34,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:35,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:35,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:08:35,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:35,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:35,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657483955] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:35,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:35,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:08:35,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361494251] [2022-01-18 15:08:35,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:35,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:08:35,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:35,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:08:35,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:08:35,119 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:35,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:35,208 INFO L93 Difference]: Finished difference Result 439 states and 1284 transitions. [2022-01-18 15:08:35,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:08:35,209 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:35,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:35,211 INFO L225 Difference]: With dead ends: 439 [2022-01-18 15:08:35,211 INFO L226 Difference]: Without dead ends: 409 [2022-01-18 15:08:35,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:08:35,211 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:35,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 166 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 185 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-01-18 15:08:35,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-18 15:08:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 300. [2022-01-18 15:08:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9899665551839463) internal successors, (894), 299 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 894 transitions. [2022-01-18 15:08:35,218 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 894 transitions. Word has length 20 [2022-01-18 15:08:35,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:35,218 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 894 transitions. [2022-01-18 15:08:35,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 894 transitions. [2022-01-18 15:08:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:35,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:35,219 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:35,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 15:08:35,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 15:08:35,423 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:35,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:35,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1934604139, now seen corresponding path program 26 times [2022-01-18 15:08:35,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:35,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542086626] [2022-01-18 15:08:35,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:35,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:35,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:35,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542086626] [2022-01-18 15:08:35,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542086626] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:35,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416832021] [2022-01-18 15:08:35,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:08:35,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:35,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:35,592 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:35,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 15:08:35,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:08:35,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:35,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:35,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:35,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:35,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:35,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:35,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:35,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:35,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:36,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:36,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:36,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:36,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:08:36,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:36,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:36,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416832021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:36,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:36,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:36,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175653339] [2022-01-18 15:08:36,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:36,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:36,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:36,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:36,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:36,172 INFO L87 Difference]: Start difference. First operand 300 states and 894 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:36,444 INFO L93 Difference]: Finished difference Result 502 states and 1471 transitions. [2022-01-18 15:08:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:08:36,445 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:36,446 INFO L225 Difference]: With dead ends: 502 [2022-01-18 15:08:36,446 INFO L226 Difference]: Without dead ends: 487 [2022-01-18 15:08:36,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:08:36,447 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:36,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 177 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 455 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-01-18 15:08:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-01-18 15:08:36,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 306. [2022-01-18 15:08:36,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9934426229508198) internal successors, (913), 305 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:36,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 913 transitions. [2022-01-18 15:08:36,455 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 913 transitions. Word has length 20 [2022-01-18 15:08:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:36,456 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 913 transitions. [2022-01-18 15:08:36,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:36,456 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 913 transitions. [2022-01-18 15:08:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:36,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:36,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:36,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:36,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 15:08:36,663 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:36,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:36,664 INFO L85 PathProgramCache]: Analyzing trace with hash -608693927, now seen corresponding path program 27 times [2022-01-18 15:08:36,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:36,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132624372] [2022-01-18 15:08:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:36,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:36,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:36,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132624372] [2022-01-18 15:08:36,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132624372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:36,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095236383] [2022-01-18 15:08:36,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:08:36,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:36,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:36,831 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:36,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 15:08:36,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:08:36,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:36,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:36,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:36,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:37,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:37,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:37,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:37,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:37,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:37,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:37,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:37,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:37,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:08:37,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:37,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:37,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095236383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:37,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:37,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:37,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248948057] [2022-01-18 15:08:37,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:37,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:37,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:37,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:37,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:37,370 INFO L87 Difference]: Start difference. First operand 306 states and 913 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:37,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:37,586 INFO L93 Difference]: Finished difference Result 477 states and 1391 transitions. [2022-01-18 15:08:37,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:08:37,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:37,588 INFO L225 Difference]: With dead ends: 477 [2022-01-18 15:08:37,588 INFO L226 Difference]: Without dead ends: 447 [2022-01-18 15:08:37,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:08:37,588 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:37,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 209 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 436 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-01-18 15:08:37,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-18 15:08:37,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 302. [2022-01-18 15:08:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9800664451827243) internal successors, (897), 301 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:37,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 897 transitions. [2022-01-18 15:08:37,594 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 897 transitions. Word has length 20 [2022-01-18 15:08:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:37,595 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 897 transitions. [2022-01-18 15:08:37,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:37,595 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 897 transitions. [2022-01-18 15:08:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:37,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:37,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:37,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:37,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 15:08:37,803 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:37,804 INFO L85 PathProgramCache]: Analyzing trace with hash 106457743, now seen corresponding path program 28 times [2022-01-18 15:08:37,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:37,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890056143] [2022-01-18 15:08:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:37,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:37,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:37,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890056143] [2022-01-18 15:08:37,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890056143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:37,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031461818] [2022-01-18 15:08:37,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:08:37,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:37,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:37,944 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:37,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 15:08:37,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:08:37,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:37,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:37,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:38,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:38,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:38,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:38,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:08:38,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:38,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:38,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:38,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:38,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:08:38,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:38,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:08:38,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:38,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:38,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031461818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:38,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:38,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:08:38,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053470485] [2022-01-18 15:08:38,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:38,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:08:38,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:38,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:08:38,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:08:38,488 INFO L87 Difference]: Start difference. First operand 302 states and 897 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:38,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:38,678 INFO L93 Difference]: Finished difference Result 434 states and 1272 transitions. [2022-01-18 15:08:38,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:08:38,679 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:38,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:38,680 INFO L225 Difference]: With dead ends: 434 [2022-01-18 15:08:38,680 INFO L226 Difference]: Without dead ends: 404 [2022-01-18 15:08:38,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:08:38,680 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:38,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 148 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 474 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-01-18 15:08:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-18 15:08:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 306. [2022-01-18 15:08:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9934426229508198) internal successors, (913), 305 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 913 transitions. [2022-01-18 15:08:38,686 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 913 transitions. Word has length 20 [2022-01-18 15:08:38,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:38,686 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 913 transitions. [2022-01-18 15:08:38,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 913 transitions. [2022-01-18 15:08:38,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:38,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:38,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:38,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:38,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 15:08:38,909 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:38,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:38,910 INFO L85 PathProgramCache]: Analyzing trace with hash 693373345, now seen corresponding path program 29 times [2022-01-18 15:08:38,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:38,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009981870] [2022-01-18 15:08:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:38,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:39,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:39,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009981870] [2022-01-18 15:08:39,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009981870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:39,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425421392] [2022-01-18 15:08:39,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:08:39,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:39,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:39,042 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:39,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 15:08:39,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:08:39,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:39,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:39,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:39,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:39,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:39,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:39,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:08:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:39,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:39,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:39,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:08:39,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:39,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:08:39,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:39,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:39,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425421392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:39,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:39,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:39,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968683521] [2022-01-18 15:08:39,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:39,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:39,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:39,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:39,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:39,517 INFO L87 Difference]: Start difference. First operand 306 states and 913 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:39,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:39,857 INFO L93 Difference]: Finished difference Result 512 states and 1478 transitions. [2022-01-18 15:08:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:08:39,858 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:39,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:39,858 INFO L225 Difference]: With dead ends: 512 [2022-01-18 15:08:39,859 INFO L226 Difference]: Without dead ends: 482 [2022-01-18 15:08:39,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:08:39,859 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:39,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 239 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:08:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-01-18 15:08:39,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 298. [2022-01-18 15:08:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2022-01-18 15:08:39,866 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2022-01-18 15:08:39,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:39,866 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2022-01-18 15:08:39,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:39,866 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2022-01-18 15:08:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:39,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:39,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:39,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:40,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:40,083 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:40,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:40,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1692373105, now seen corresponding path program 30 times [2022-01-18 15:08:40,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:40,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179035671] [2022-01-18 15:08:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:40,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:40,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:40,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179035671] [2022-01-18 15:08:40,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179035671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:40,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417319934] [2022-01-18 15:08:40,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:08:40,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:40,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:40,231 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:40,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 15:08:40,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:08:40,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:40,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:40,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:40,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:40,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:40,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:40,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:40,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:40,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:40,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:40,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:40,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:40,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:40,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:08:40,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:40,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:40,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417319934] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:40,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:40,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:40,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478369447] [2022-01-18 15:08:40,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:40,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:40,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:40,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:40,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:40,753 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:41,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:41,015 INFO L93 Difference]: Finished difference Result 468 states and 1371 transitions. [2022-01-18 15:08:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:08:41,015 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:41,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:41,016 INFO L225 Difference]: With dead ends: 468 [2022-01-18 15:08:41,016 INFO L226 Difference]: Without dead ends: 453 [2022-01-18 15:08:41,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:08:41,017 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:41,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 226 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 495 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-01-18 15:08:41,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-18 15:08:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 306. [2022-01-18 15:08:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9934426229508198) internal successors, (913), 305 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 913 transitions. [2022-01-18 15:08:41,023 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 913 transitions. Word has length 20 [2022-01-18 15:08:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:41,023 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 913 transitions. [2022-01-18 15:08:41,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 913 transitions. [2022-01-18 15:08:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:41,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:41,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:41,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:41,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 15:08:41,235 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:41,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:41,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1825709935, now seen corresponding path program 31 times [2022-01-18 15:08:41,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:41,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110435518] [2022-01-18 15:08:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:41,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:41,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:41,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110435518] [2022-01-18 15:08:41,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110435518] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:41,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196669580] [2022-01-18 15:08:41,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:08:41,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:41,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:41,408 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:41,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 15:08:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:41,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:41,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:41,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:41,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:41,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:41,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:41,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:41,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:41,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:41,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:41,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:41,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:41,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:08:41,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:41,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:41,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196669580] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:41,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:41,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:41,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558509197] [2022-01-18 15:08:41,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:41,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:41,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:41,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:41,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:41,926 INFO L87 Difference]: Start difference. First operand 306 states and 913 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:42,211 INFO L93 Difference]: Finished difference Result 491 states and 1427 transitions. [2022-01-18 15:08:42,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:08:42,211 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:42,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:42,212 INFO L225 Difference]: With dead ends: 491 [2022-01-18 15:08:42,212 INFO L226 Difference]: Without dead ends: 476 [2022-01-18 15:08:42,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:08:42,213 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:42,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 219 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 510 Invalid, 0 Unknown, 179 Unchecked, 0.2s Time] [2022-01-18 15:08:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-18 15:08:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 304. [2022-01-18 15:08:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.99009900990099) internal successors, (906), 303 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:42,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 906 transitions. [2022-01-18 15:08:42,218 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 906 transitions. Word has length 20 [2022-01-18 15:08:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:42,218 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 906 transitions. [2022-01-18 15:08:42,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 906 transitions. [2022-01-18 15:08:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:42,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:42,219 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:42,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 15:08:42,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:42,423 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:42,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:42,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1096267189, now seen corresponding path program 32 times [2022-01-18 15:08:42,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:42,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86385884] [2022-01-18 15:08:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:42,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:42,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:42,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86385884] [2022-01-18 15:08:42,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86385884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:42,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955316320] [2022-01-18 15:08:42,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:08:42,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:42,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:42,574 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:42,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 15:08:42,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:08:42,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:42,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:42,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:42,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:42,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:42,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:42,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:42,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:42,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:42,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:42,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:42,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:43,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:43,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:08:43,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:43,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:43,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955316320] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:43,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:43,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:43,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788627515] [2022-01-18 15:08:43,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:43,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:43,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:43,081 INFO L87 Difference]: Start difference. First operand 304 states and 906 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:43,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:43,479 INFO L93 Difference]: Finished difference Result 462 states and 1356 transitions. [2022-01-18 15:08:43,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:08:43,479 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:43,480 INFO L225 Difference]: With dead ends: 462 [2022-01-18 15:08:43,480 INFO L226 Difference]: Without dead ends: 447 [2022-01-18 15:08:43,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:08:43,481 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:43,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 236 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 747 Invalid, 0 Unknown, 75 Unchecked, 0.3s Time] [2022-01-18 15:08:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-18 15:08:43,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 302. [2022-01-18 15:08:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9867109634551494) internal successors, (899), 301 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:43,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2022-01-18 15:08:43,491 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2022-01-18 15:08:43,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:43,491 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2022-01-18 15:08:43,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:43,491 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2022-01-18 15:08:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:43,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:43,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:43,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 15:08:43,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:43,707 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:43,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:43,708 INFO L85 PathProgramCache]: Analyzing trace with hash -570766549, now seen corresponding path program 33 times [2022-01-18 15:08:43,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:43,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598532905] [2022-01-18 15:08:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:43,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:43,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:43,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598532905] [2022-01-18 15:08:43,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598532905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:43,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663239629] [2022-01-18 15:08:43,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:08:43,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:43,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:43,870 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:43,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 15:08:43,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:08:43,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:43,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:43,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:43,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:43,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:44,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:44,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:44,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:44,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:44,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:44,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:44,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:44,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:44,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:08:44,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:44,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:44,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663239629] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:44,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:44,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:44,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407501077] [2022-01-18 15:08:44,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:44,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:44,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:44,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:44,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:44,432 INFO L87 Difference]: Start difference. First operand 302 states and 899 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:44,760 INFO L93 Difference]: Finished difference Result 510 states and 1479 transitions. [2022-01-18 15:08:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:08:44,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:44,762 INFO L225 Difference]: With dead ends: 510 [2022-01-18 15:08:44,762 INFO L226 Difference]: Without dead ends: 495 [2022-01-18 15:08:44,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:08:44,763 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:44,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 236 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 633 Invalid, 0 Unknown, 106 Unchecked, 0.2s Time] [2022-01-18 15:08:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-01-18 15:08:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 304. [2022-01-18 15:08:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.99009900990099) internal successors, (906), 303 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 906 transitions. [2022-01-18 15:08:44,769 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 906 transitions. Word has length 20 [2022-01-18 15:08:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:44,770 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 906 transitions. [2022-01-18 15:08:44,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 906 transitions. [2022-01-18 15:08:44,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:44,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:44,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:44,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:44,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-18 15:08:44,975 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:44,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:44,976 INFO L85 PathProgramCache]: Analyzing trace with hash 418293999, now seen corresponding path program 34 times [2022-01-18 15:08:44,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:44,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165556632] [2022-01-18 15:08:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:44,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:45,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:45,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165556632] [2022-01-18 15:08:45,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165556632] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:45,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970162347] [2022-01-18 15:08:45,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:08:45,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:45,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:45,148 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:45,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 15:08:45,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:08:45,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:45,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:45,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:45,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:45,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:45,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:45,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:45,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:45,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:45,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:45,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:45,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:45,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:45,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:08:45,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:45,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:45,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970162347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:45,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:45,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:45,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392764833] [2022-01-18 15:08:45,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:45,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:45,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:45,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:45,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:45,651 INFO L87 Difference]: Start difference. First operand 304 states and 906 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:45,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:45,993 INFO L93 Difference]: Finished difference Result 500 states and 1456 transitions. [2022-01-18 15:08:45,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:08:45,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:45,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:45,994 INFO L225 Difference]: With dead ends: 500 [2022-01-18 15:08:45,994 INFO L226 Difference]: Without dead ends: 485 [2022-01-18 15:08:45,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:08:45,995 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:45,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 238 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 661 Invalid, 0 Unknown, 124 Unchecked, 0.3s Time] [2022-01-18 15:08:45,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-18 15:08:46,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 301. [2022-01-18 15:08:46,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.98) internal successors, (894), 300 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:46,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 894 transitions. [2022-01-18 15:08:46,001 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 894 transitions. Word has length 20 [2022-01-18 15:08:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:46,001 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 894 transitions. [2022-01-18 15:08:46,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 894 transitions. [2022-01-18 15:08:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:46,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:46,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:46,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:46,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 15:08:46,224 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:46,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:46,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1588862951, now seen corresponding path program 35 times [2022-01-18 15:08:46,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:46,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342512078] [2022-01-18 15:08:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:46,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:46,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342512078] [2022-01-18 15:08:46,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342512078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:46,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981480786] [2022-01-18 15:08:46,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:08:46,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:46,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:46,370 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:46,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 15:08:46,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:08:46,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:46,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:46,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:46,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:46,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:46,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:46,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:08:46,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:46,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:46,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:46,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:46,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:08:46,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:46,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:08:46,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:46,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:46,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981480786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:46,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:46,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:46,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832058107] [2022-01-18 15:08:46,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:46,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:46,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:46,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:46,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:46,857 INFO L87 Difference]: Start difference. First operand 301 states and 894 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:47,172 INFO L93 Difference]: Finished difference Result 441 states and 1294 transitions. [2022-01-18 15:08:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:08:47,172 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:47,173 INFO L225 Difference]: With dead ends: 441 [2022-01-18 15:08:47,173 INFO L226 Difference]: Without dead ends: 426 [2022-01-18 15:08:47,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:08:47,174 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:47,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 167 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 554 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-18 15:08:47,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-01-18 15:08:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 304. [2022-01-18 15:08:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.99009900990099) internal successors, (906), 303 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 906 transitions. [2022-01-18 15:08:47,180 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 906 transitions. Word has length 20 [2022-01-18 15:08:47,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:47,180 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 906 transitions. [2022-01-18 15:08:47,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:47,180 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 906 transitions. [2022-01-18 15:08:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:47,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:47,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:47,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:47,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 15:08:47,391 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:47,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:47,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1182297261, now seen corresponding path program 36 times [2022-01-18 15:08:47,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:47,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126857036] [2022-01-18 15:08:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:47,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:47,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:47,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126857036] [2022-01-18 15:08:47,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126857036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:47,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955016608] [2022-01-18 15:08:47,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:08:47,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:47,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:47,530 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:47,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 15:08:47,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:08:47,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:47,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:47,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:47,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:47,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:47,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:47,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:08:47,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:47,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:47,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:47,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:47,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:08:47,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:47,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:08:47,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:47,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:48,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955016608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:48,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:48,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:48,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048491307] [2022-01-18 15:08:48,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:48,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:48,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:48,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:48,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:48,036 INFO L87 Difference]: Start difference. First operand 304 states and 906 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:48,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:48,299 INFO L93 Difference]: Finished difference Result 456 states and 1335 transitions. [2022-01-18 15:08:48,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:08:48,299 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:48,300 INFO L225 Difference]: With dead ends: 456 [2022-01-18 15:08:48,300 INFO L226 Difference]: Without dead ends: 441 [2022-01-18 15:08:48,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:08:48,301 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:48,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 203 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 472 Invalid, 0 Unknown, 163 Unchecked, 0.2s Time] [2022-01-18 15:08:48,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-01-18 15:08:48,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 310. [2022-01-18 15:08:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9902912621359223) internal successors, (924), 309 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 924 transitions. [2022-01-18 15:08:48,307 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 924 transitions. Word has length 20 [2022-01-18 15:08:48,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:48,308 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 924 transitions. [2022-01-18 15:08:48,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 924 transitions. [2022-01-18 15:08:48,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:48,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:48,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:48,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:48,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:48,523 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:48,524 INFO L85 PathProgramCache]: Analyzing trace with hash 864256751, now seen corresponding path program 37 times [2022-01-18 15:08:48,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:48,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973201261] [2022-01-18 15:08:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:48,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:48,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:48,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973201261] [2022-01-18 15:08:48,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973201261] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:48,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140557868] [2022-01-18 15:08:48,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:08:48,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:48,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:48,688 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:48,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 15:08:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:48,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:48,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:48,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:48,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:48,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:48,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:08:48,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:48,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:48,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:49,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:49,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:08:49,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:49,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:08:49,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:49,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:49,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140557868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:49,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:49,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:49,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764484570] [2022-01-18 15:08:49,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:49,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:49,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:49,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:49,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:49,216 INFO L87 Difference]: Start difference. First operand 310 states and 924 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:49,419 INFO L93 Difference]: Finished difference Result 457 states and 1330 transitions. [2022-01-18 15:08:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:08:49,419 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:49,420 INFO L225 Difference]: With dead ends: 457 [2022-01-18 15:08:49,420 INFO L226 Difference]: Without dead ends: 450 [2022-01-18 15:08:49,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:08:49,421 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:49,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 188 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 374 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2022-01-18 15:08:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-01-18 15:08:49,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 313. [2022-01-18 15:08:49,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.983974358974359) internal successors, (931), 312 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 931 transitions. [2022-01-18 15:08:49,425 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 931 transitions. Word has length 20 [2022-01-18 15:08:49,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:49,425 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 931 transitions. [2022-01-18 15:08:49,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:49,426 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 931 transitions. [2022-01-18 15:08:49,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:49,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:49,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:49,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 15:08:49,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 15:08:49,627 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:49,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:49,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1451172353, now seen corresponding path program 38 times [2022-01-18 15:08:49,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:49,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124542042] [2022-01-18 15:08:49,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:49,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:49,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:49,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124542042] [2022-01-18 15:08:49,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124542042] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:49,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822399216] [2022-01-18 15:08:49,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:08:49,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:49,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:49,785 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:49,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 15:08:49,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:08:49,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:49,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:49,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:49,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:49,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:50,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:50,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:08:50,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:50,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:50,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:50,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:50,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:50,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:08:50,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:50,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:08:50,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:50,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:08:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:50,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822399216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:50,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:50,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:50,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088315189] [2022-01-18 15:08:50,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:50,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:50,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:50,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:50,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:50,321 INFO L87 Difference]: Start difference. First operand 313 states and 931 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:50,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:50,525 INFO L93 Difference]: Finished difference Result 514 states and 1470 transitions. [2022-01-18 15:08:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:08:50,525 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:50,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:50,526 INFO L225 Difference]: With dead ends: 514 [2022-01-18 15:08:50,526 INFO L226 Difference]: Without dead ends: 484 [2022-01-18 15:08:50,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:08:50,527 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:50,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 173 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 430 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-01-18 15:08:50,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-01-18 15:08:50,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 313. [2022-01-18 15:08:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.983974358974359) internal successors, (931), 312 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 931 transitions. [2022-01-18 15:08:50,532 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 931 transitions. Word has length 20 [2022-01-18 15:08:50,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:50,532 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 931 transitions. [2022-01-18 15:08:50,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:50,532 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 931 transitions. [2022-01-18 15:08:50,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:50,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:50,533 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:50,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 15:08:50,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 15:08:50,736 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:50,736 INFO L85 PathProgramCache]: Analyzing trace with hash 775790425, now seen corresponding path program 39 times [2022-01-18 15:08:50,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:50,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13675730] [2022-01-18 15:08:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:50,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:50,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:50,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13675730] [2022-01-18 15:08:50,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13675730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:50,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343568836] [2022-01-18 15:08:50,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:08:50,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:50,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:50,872 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:50,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 15:08:50,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:08:50,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:50,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:08:50,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:50,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:50,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:51,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:51,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:08:51,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:51,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:51,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:51,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:51,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-18 15:08:51,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:51,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 15:08:51,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:51,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 15:08:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:51,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343568836] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:51,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:51,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:51,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243639665] [2022-01-18 15:08:51,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:51,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:51,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:51,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:51,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:51,526 INFO L87 Difference]: Start difference. First operand 313 states and 931 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:52,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:52,014 INFO L93 Difference]: Finished difference Result 569 states and 1653 transitions. [2022-01-18 15:08:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:08:52,015 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:52,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:52,016 INFO L225 Difference]: With dead ends: 569 [2022-01-18 15:08:52,016 INFO L226 Difference]: Without dead ends: 536 [2022-01-18 15:08:52,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:08:52,017 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 57 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:52,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 318 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 724 Invalid, 0 Unknown, 158 Unchecked, 0.3s Time] [2022-01-18 15:08:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-18 15:08:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 335. [2022-01-18 15:08:52,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.029940119760479) internal successors, (1012), 334 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:52,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1012 transitions. [2022-01-18 15:08:52,023 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1012 transitions. Word has length 20 [2022-01-18 15:08:52,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:52,023 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1012 transitions. [2022-01-18 15:08:52,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:52,023 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1012 transitions. [2022-01-18 15:08:52,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:52,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:52,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:52,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:52,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:52,239 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:52,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2007222891, now seen corresponding path program 40 times [2022-01-18 15:08:52,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:52,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927212291] [2022-01-18 15:08:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:52,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:52,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:52,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927212291] [2022-01-18 15:08:52,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927212291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:52,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777456617] [2022-01-18 15:08:52,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:08:52,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:52,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:52,406 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:52,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 15:08:52,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:08:52,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:52,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:52,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:52,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:52,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:52,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:52,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:52,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:52,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:52,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:52,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:52,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:52,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:52,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:52,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:52,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:52,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777456617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:52,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:52,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:52,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186766952] [2022-01-18 15:08:52,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:52,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:52,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:52,904 INFO L87 Difference]: Start difference. First operand 335 states and 1012 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:53,397 INFO L93 Difference]: Finished difference Result 597 states and 1758 transitions. [2022-01-18 15:08:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:08:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:53,399 INFO L225 Difference]: With dead ends: 597 [2022-01-18 15:08:53,399 INFO L226 Difference]: Without dead ends: 567 [2022-01-18 15:08:53,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:08:53,400 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:53,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 294 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 820 Invalid, 0 Unknown, 130 Unchecked, 0.3s Time] [2022-01-18 15:08:53,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-18 15:08:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 341. [2022-01-18 15:08:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0294117647058822) internal successors, (1030), 340 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1030 transitions. [2022-01-18 15:08:53,406 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1030 transitions. Word has length 20 [2022-01-18 15:08:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:53,406 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1030 transitions. [2022-01-18 15:08:53,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1030 transitions. [2022-01-18 15:08:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:53,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:53,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:53,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:53,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 15:08:53,608 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:53,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:53,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1009159691, now seen corresponding path program 41 times [2022-01-18 15:08:53,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:53,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331441256] [2022-01-18 15:08:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:53,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:53,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:53,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331441256] [2022-01-18 15:08:53,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331441256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:53,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765335958] [2022-01-18 15:08:53,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:08:53,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:53,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:53,782 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:53,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 15:08:53,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:08:53,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:53,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:53,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:53,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:53,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:53,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:53,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:53,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:53,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:54,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:54,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:54,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:54,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:54,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:54,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:54,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:54,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765335958] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:54,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:54,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:54,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370452886] [2022-01-18 15:08:54,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:54,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:54,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:54,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:54,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:54,293 INFO L87 Difference]: Start difference. First operand 341 states and 1030 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:54,614 INFO L93 Difference]: Finished difference Result 511 states and 1545 transitions. [2022-01-18 15:08:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:08:54,614 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:54,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:54,615 INFO L225 Difference]: With dead ends: 511 [2022-01-18 15:08:54,615 INFO L226 Difference]: Without dead ends: 496 [2022-01-18 15:08:54,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:08:54,616 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:54,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 183 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 568 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-01-18 15:08:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-18 15:08:54,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 351. [2022-01-18 15:08:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0314285714285716) internal successors, (1061), 350 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1061 transitions. [2022-01-18 15:08:54,621 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1061 transitions. Word has length 20 [2022-01-18 15:08:54,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:54,621 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1061 transitions. [2022-01-18 15:08:54,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1061 transitions. [2022-01-18 15:08:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:54,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:54,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:54,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 15:08:54,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:54,823 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:54,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:54,823 INFO L85 PathProgramCache]: Analyzing trace with hash 232275435, now seen corresponding path program 42 times [2022-01-18 15:08:54,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:54,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974940939] [2022-01-18 15:08:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:54,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:54,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:54,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974940939] [2022-01-18 15:08:54,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974940939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:54,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291779826] [2022-01-18 15:08:54,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:08:54,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:54,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:54,982 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:54,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 15:08:55,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:08:55,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:55,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:55,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:55,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:55,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:55,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:55,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:55,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:55,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:55,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:55,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:55,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:55,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:55,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:55,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:55,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:55,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291779826] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:55,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:55,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:55,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274402542] [2022-01-18 15:08:55,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:55,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:55,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:55,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:55,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:55,470 INFO L87 Difference]: Start difference. First operand 351 states and 1061 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:55,894 INFO L93 Difference]: Finished difference Result 616 states and 1801 transitions. [2022-01-18 15:08:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:08:55,894 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:55,896 INFO L225 Difference]: With dead ends: 616 [2022-01-18 15:08:55,896 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 15:08:55,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:08:55,896 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 54 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:55,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 209 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 592 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-01-18 15:08:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 15:08:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 339. [2022-01-18 15:08:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.032544378698225) internal successors, (1025), 338 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1025 transitions. [2022-01-18 15:08:55,904 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1025 transitions. Word has length 20 [2022-01-18 15:08:55,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:55,904 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1025 transitions. [2022-01-18 15:08:55,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:55,904 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1025 transitions. [2022-01-18 15:08:55,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:55,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:55,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:55,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:56,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:56,127 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:56,127 INFO L85 PathProgramCache]: Analyzing trace with hash -988330193, now seen corresponding path program 43 times [2022-01-18 15:08:56,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:56,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959940091] [2022-01-18 15:08:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:56,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:56,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:56,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959940091] [2022-01-18 15:08:56,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959940091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:56,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475302083] [2022-01-18 15:08:56,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:08:56,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:56,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:56,264 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:56,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 15:08:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:56,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:56,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:56,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:56,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:56,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:56,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:56,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:56,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:56,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:56,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:56,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:56,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:56,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:56,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:56,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:56,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475302083] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:56,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:56,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:08:56,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019026470] [2022-01-18 15:08:56,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:56,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:08:56,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:56,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:08:56,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:08:56,840 INFO L87 Difference]: Start difference. First operand 339 states and 1025 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:57,359 INFO L93 Difference]: Finished difference Result 571 states and 1672 transitions. [2022-01-18 15:08:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:08:57,359 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:57,360 INFO L225 Difference]: With dead ends: 571 [2022-01-18 15:08:57,361 INFO L226 Difference]: Without dead ends: 541 [2022-01-18 15:08:57,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:08:57,361 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:57,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 256 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 756 Invalid, 0 Unknown, 184 Unchecked, 0.3s Time] [2022-01-18 15:08:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-18 15:08:57,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 343. [2022-01-18 15:08:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.043859649122807) internal successors, (1041), 342 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1041 transitions. [2022-01-18 15:08:57,368 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1041 transitions. Word has length 20 [2022-01-18 15:08:57,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:57,368 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1041 transitions. [2022-01-18 15:08:57,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:57,368 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1041 transitions. [2022-01-18 15:08:57,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:57,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:57,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:57,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:57,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 15:08:57,569 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:57,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:57,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1259282159, now seen corresponding path program 44 times [2022-01-18 15:08:57,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:57,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549209930] [2022-01-18 15:08:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:57,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:57,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:57,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549209930] [2022-01-18 15:08:57,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549209930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:57,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492600019] [2022-01-18 15:08:57,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:08:57,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:57,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:57,730 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:57,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 15:08:57,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:08:57,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:57,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:57,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:57,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:57,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:57,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:57,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:57,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:57,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:58,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:58,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:58,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:58,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:58,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:58,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:58,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492600019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:58,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:58,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:58,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987132993] [2022-01-18 15:08:58,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:58,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:58,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:58,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:58,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:58,295 INFO L87 Difference]: Start difference. First operand 343 states and 1041 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:58,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:08:58,753 INFO L93 Difference]: Finished difference Result 615 states and 1801 transitions. [2022-01-18 15:08:58,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:08:58,753 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:08:58,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:08:58,754 INFO L225 Difference]: With dead ends: 615 [2022-01-18 15:08:58,754 INFO L226 Difference]: Without dead ends: 585 [2022-01-18 15:08:58,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:08:58,755 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:08:58,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 207 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 622 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-01-18 15:08:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-01-18 15:08:58,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 339. [2022-01-18 15:08:58,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.032544378698225) internal successors, (1025), 338 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1025 transitions. [2022-01-18 15:08:58,760 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1025 transitions. Word has length 20 [2022-01-18 15:08:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:08:58,760 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1025 transitions. [2022-01-18 15:08:58,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:08:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1025 transitions. [2022-01-18 15:08:58,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:08:58,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:08:58,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:08:58,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 15:08:58,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 15:08:58,971 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:08:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:08:58,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1236381071, now seen corresponding path program 45 times [2022-01-18 15:08:58,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:08:58,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148239710] [2022-01-18 15:08:58,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:08:58,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:08:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:08:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:59,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:08:59,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148239710] [2022-01-18 15:08:59,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148239710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:08:59,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894581353] [2022-01-18 15:08:59,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:08:59,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:08:59,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:08:59,147 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:08:59,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 15:08:59,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:08:59,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:08:59,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:08:59,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:08:59,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:59,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:08:59,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:59,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:08:59,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:08:59,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:08:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:59,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:08:59,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:59,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:08:59,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:59,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:08:59,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:08:59,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:08:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:08:59,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894581353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:08:59,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:08:59,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:08:59,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758636183] [2022-01-18 15:08:59,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:08:59,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:08:59,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:08:59,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:08:59,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:08:59,693 INFO L87 Difference]: Start difference. First operand 339 states and 1025 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:00,073 INFO L93 Difference]: Finished difference Result 578 states and 1690 transitions. [2022-01-18 15:09:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:09:00,074 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:00,075 INFO L225 Difference]: With dead ends: 578 [2022-01-18 15:09:00,075 INFO L226 Difference]: Without dead ends: 548 [2022-01-18 15:09:00,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:09:00,076 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:00,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 150 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 443 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-01-18 15:09:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-18 15:09:00,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 344. [2022-01-18 15:09:00,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.043731778425656) internal successors, (1044), 343 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1044 transitions. [2022-01-18 15:09:00,091 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1044 transitions. Word has length 20 [2022-01-18 15:09:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:00,091 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1044 transitions. [2022-01-18 15:09:00,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1044 transitions. [2022-01-18 15:09:00,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:00,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:00,092 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:00,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:00,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-01-18 15:09:00,316 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:00,316 INFO L85 PathProgramCache]: Analyzing trace with hash 459496815, now seen corresponding path program 46 times [2022-01-18 15:09:00,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:00,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055374268] [2022-01-18 15:09:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:00,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:00,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:00,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055374268] [2022-01-18 15:09:00,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055374268] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:00,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090051511] [2022-01-18 15:09:00,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:09:00,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:00,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:00,448 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:00,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 15:09:00,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:09:00,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:00,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:00,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:00,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:00,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:00,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:00,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:00,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:00,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:00,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:00,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:00,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:00,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:00,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:09:00,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:00,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:09:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:01,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090051511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:01,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:01,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:09:01,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123532557] [2022-01-18 15:09:01,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:01,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:09:01,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:01,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:09:01,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:09:01,072 INFO L87 Difference]: Start difference. First operand 344 states and 1044 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:01,489 INFO L93 Difference]: Finished difference Result 535 states and 1575 transitions. [2022-01-18 15:09:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:09:01,489 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:01,495 INFO L225 Difference]: With dead ends: 535 [2022-01-18 15:09:01,496 INFO L226 Difference]: Without dead ends: 520 [2022-01-18 15:09:01,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:09:01,496 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:01,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 173 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 532 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2022-01-18 15:09:01,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-01-18 15:09:01,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 342. [2022-01-18 15:09:01,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0410557184750733) internal successors, (1037), 341 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1037 transitions. [2022-01-18 15:09:01,504 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1037 transitions. Word has length 20 [2022-01-18 15:09:01,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:01,504 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1037 transitions. [2022-01-18 15:09:01,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:01,504 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1037 transitions. [2022-01-18 15:09:01,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:01,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:01,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:01,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:01,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:01,706 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:01,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1832486987, now seen corresponding path program 47 times [2022-01-18 15:09:01,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:01,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501062246] [2022-01-18 15:09:01,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:01,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:01,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:01,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501062246] [2022-01-18 15:09:01,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501062246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:01,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796162345] [2022-01-18 15:09:01,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:09:01,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:01,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:01,904 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:01,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 15:09:01,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:09:01,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:01,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:01,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:02,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:02,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:02,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:02,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:02,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:02,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:02,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:02,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:02,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:02,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:02,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:09:02,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:02,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:09:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:02,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796162345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:02,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:02,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:02,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906528334] [2022-01-18 15:09:02,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:02,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:02,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:02,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:02,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:02,558 INFO L87 Difference]: Start difference. First operand 342 states and 1037 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:03,006 INFO L93 Difference]: Finished difference Result 569 states and 1666 transitions. [2022-01-18 15:09:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:09:03,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:03,007 INFO L225 Difference]: With dead ends: 569 [2022-01-18 15:09:03,007 INFO L226 Difference]: Without dead ends: 539 [2022-01-18 15:09:03,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:09:03,008 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:03,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 216 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 746 Invalid, 0 Unknown, 74 Unchecked, 0.3s Time] [2022-01-18 15:09:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-18 15:09:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 338. [2022-01-18 15:09:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.029673590504451) internal successors, (1021), 337 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1021 transitions. [2022-01-18 15:09:03,020 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1021 transitions. Word has length 20 [2022-01-18 15:09:03,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:03,020 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1021 transitions. [2022-01-18 15:09:03,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1021 transitions. [2022-01-18 15:09:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:03,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:03,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:03,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 15:09:03,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 15:09:03,221 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:03,222 INFO L85 PathProgramCache]: Analyzing trace with hash 921070369, now seen corresponding path program 48 times [2022-01-18 15:09:03,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:03,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672548264] [2022-01-18 15:09:03,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:03,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:03,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:03,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672548264] [2022-01-18 15:09:03,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672548264] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:03,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152338248] [2022-01-18 15:09:03,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:09:03,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:03,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:03,401 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:03,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 15:09:03,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:09:03,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:03,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:03,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:03,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:03,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:03,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:03,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:03,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:03,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:03,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:03,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:03,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:03,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:03,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:03,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:03,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:03,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152338248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:03,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:03,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:03,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370130212] [2022-01-18 15:09:03,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:03,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:03,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:03,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:03,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:03,935 INFO L87 Difference]: Start difference. First operand 338 states and 1021 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:04,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:04,265 INFO L93 Difference]: Finished difference Result 555 states and 1634 transitions. [2022-01-18 15:09:04,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:09:04,265 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:04,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:04,266 INFO L225 Difference]: With dead ends: 555 [2022-01-18 15:09:04,266 INFO L226 Difference]: Without dead ends: 525 [2022-01-18 15:09:04,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:09:04,267 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:04,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 202 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 496 Invalid, 0 Unknown, 166 Unchecked, 0.2s Time] [2022-01-18 15:09:04,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-18 15:09:04,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 340. [2022-01-18 15:09:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.03834808259587) internal successors, (1030), 339 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1030 transitions. [2022-01-18 15:09:04,272 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1030 transitions. Word has length 20 [2022-01-18 15:09:04,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:04,272 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1030 transitions. [2022-01-18 15:09:04,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:04,272 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1030 transitions. [2022-01-18 15:09:04,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:04,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:04,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:04,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 15:09:04,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 15:09:04,473 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:04,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:04,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1842772509, now seen corresponding path program 49 times [2022-01-18 15:09:04,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:04,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19774228] [2022-01-18 15:09:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:04,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:04,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:04,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19774228] [2022-01-18 15:09:04,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19774228] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:04,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207048000] [2022-01-18 15:09:04,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:09:04,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:04,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:04,615 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:04,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 15:09:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:04,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:04,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:04,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:04,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:04,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:04,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:04,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:04,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:04,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:05,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:05,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:05,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:05,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:05,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:05,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:05,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207048000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:05,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:05,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:05,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761293703] [2022-01-18 15:09:05,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:05,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:05,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:05,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:05,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:05,123 INFO L87 Difference]: Start difference. First operand 340 states and 1030 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:05,406 INFO L93 Difference]: Finished difference Result 540 states and 1600 transitions. [2022-01-18 15:09:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:09:05,407 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:05,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:05,408 INFO L225 Difference]: With dead ends: 540 [2022-01-18 15:09:05,408 INFO L226 Difference]: Without dead ends: 525 [2022-01-18 15:09:05,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:09:05,409 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:05,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 209 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 440 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-01-18 15:09:05,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-18 15:09:05,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 343. [2022-01-18 15:09:05,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.043859649122807) internal successors, (1041), 342 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:05,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1041 transitions. [2022-01-18 15:09:05,416 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1041 transitions. Word has length 20 [2022-01-18 15:09:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:05,416 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1041 transitions. [2022-01-18 15:09:05,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1041 transitions. [2022-01-18 15:09:05,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:05,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:05,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:05,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:05,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:05,640 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:05,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:05,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1126284575, now seen corresponding path program 50 times [2022-01-18 15:09:05,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:05,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893725458] [2022-01-18 15:09:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:05,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:05,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:05,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893725458] [2022-01-18 15:09:05,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893725458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:05,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829868733] [2022-01-18 15:09:05,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:09:05,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:05,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:05,780 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:05,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 15:09:05,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:09:05,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:05,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:05,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:05,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:05,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:06,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:06,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:06,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:06,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:06,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:06,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:06,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:06,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:06,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:06,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:06,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:06,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829868733] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:06,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:06,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:09:06,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122374817] [2022-01-18 15:09:06,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:06,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:09:06,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:06,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:09:06,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:09:06,376 INFO L87 Difference]: Start difference. First operand 343 states and 1041 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:06,688 INFO L93 Difference]: Finished difference Result 504 states and 1497 transitions. [2022-01-18 15:09:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:09:06,688 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:06,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:06,689 INFO L225 Difference]: With dead ends: 504 [2022-01-18 15:09:06,689 INFO L226 Difference]: Without dead ends: 474 [2022-01-18 15:09:06,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:09:06,689 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:06,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 194 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 502 Invalid, 0 Unknown, 220 Unchecked, 0.2s Time] [2022-01-18 15:09:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-18 15:09:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 339. [2022-01-18 15:09:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.032544378698225) internal successors, (1025), 338 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1025 transitions. [2022-01-18 15:09:06,694 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1025 transitions. Word has length 20 [2022-01-18 15:09:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:06,695 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1025 transitions. [2022-01-18 15:09:06,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:06,695 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1025 transitions. [2022-01-18 15:09:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:06,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:06,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:06,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 15:09:06,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-01-18 15:09:06,896 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:06,896 INFO L85 PathProgramCache]: Analyzing trace with hash 927691021, now seen corresponding path program 51 times [2022-01-18 15:09:06,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:06,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923410804] [2022-01-18 15:09:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:06,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:07,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:07,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923410804] [2022-01-18 15:09:07,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923410804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:07,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263525610] [2022-01-18 15:09:07,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:09:07,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:07,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:07,032 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:07,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 15:09:07,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:09:07,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:07,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:07,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:07,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:07,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:07,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:07,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:07,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:07,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:07,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:07,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:07,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:07,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:07,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:07,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:07,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:07,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263525610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:07,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:07,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:09:07,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544908060] [2022-01-18 15:09:07,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:07,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:09:07,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:07,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:09:07,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:09:07,646 INFO L87 Difference]: Start difference. First operand 339 states and 1025 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:07,896 INFO L93 Difference]: Finished difference Result 493 states and 1469 transitions. [2022-01-18 15:09:07,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:09:07,896 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:07,897 INFO L225 Difference]: With dead ends: 493 [2022-01-18 15:09:07,897 INFO L226 Difference]: Without dead ends: 478 [2022-01-18 15:09:07,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:09:07,898 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:07,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 160 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 413 Invalid, 0 Unknown, 164 Unchecked, 0.2s Time] [2022-01-18 15:09:07,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-01-18 15:09:07,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 345. [2022-01-18 15:09:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0348837209302326) internal successors, (1044), 344 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:07,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1044 transitions. [2022-01-18 15:09:07,904 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1044 transitions. Word has length 20 [2022-01-18 15:09:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:07,904 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1044 transitions. [2022-01-18 15:09:07,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1044 transitions. [2022-01-18 15:09:07,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:07,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:07,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:07,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 15:09:08,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:08,107 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:08,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:08,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2041366063, now seen corresponding path program 52 times [2022-01-18 15:09:08,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:08,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168802726] [2022-01-18 15:09:08,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:08,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:08,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:08,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168802726] [2022-01-18 15:09:08,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168802726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:08,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682305769] [2022-01-18 15:09:08,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:09:08,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:08,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:08,227 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:08,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 15:09:08,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:09:08,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:08,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:08,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:08,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:08,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:08,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:08,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:08,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:08,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:08,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:08,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:08,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:08,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:08,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:08,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:08,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:08,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682305769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:08,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:08,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:09:08,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472178828] [2022-01-18 15:09:08,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:08,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:09:08,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:09:08,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:09:08,694 INFO L87 Difference]: Start difference. First operand 345 states and 1044 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:08,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:08,923 INFO L93 Difference]: Finished difference Result 486 states and 1452 transitions. [2022-01-18 15:09:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:09:08,923 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:08,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:08,924 INFO L225 Difference]: With dead ends: 486 [2022-01-18 15:09:08,924 INFO L226 Difference]: Without dead ends: 471 [2022-01-18 15:09:08,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:09:08,924 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:08,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 210 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 455 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-01-18 15:09:08,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-18 15:09:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 343. [2022-01-18 15:09:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.0292397660818713) internal successors, (1036), 342 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1036 transitions. [2022-01-18 15:09:08,930 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1036 transitions. Word has length 20 [2022-01-18 15:09:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:08,930 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1036 transitions. [2022-01-18 15:09:08,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1036 transitions. [2022-01-18 15:09:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:08,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:08,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:08,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:09,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-01-18 15:09:09,153 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:09,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:09,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1737663631, now seen corresponding path program 53 times [2022-01-18 15:09:09,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:09,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265607429] [2022-01-18 15:09:09,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:09,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:09,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:09,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265607429] [2022-01-18 15:09:09,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265607429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:09,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414305250] [2022-01-18 15:09:09,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:09:09,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:09,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:09,354 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:09,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 15:09:09,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:09:09,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:09,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:09,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:09,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:09,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:09,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:09,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:09,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:09,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:09,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:09,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:09,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:09,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:09,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:09,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:09,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:09,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414305250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:09,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:09,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:09:09,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158040665] [2022-01-18 15:09:09,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:09,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:09:09,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:09,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:09:09,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:09:09,966 INFO L87 Difference]: Start difference. First operand 343 states and 1036 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:10,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:10,311 INFO L93 Difference]: Finished difference Result 483 states and 1437 transitions. [2022-01-18 15:09:10,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:09:10,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:10,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:10,312 INFO L225 Difference]: With dead ends: 483 [2022-01-18 15:09:10,312 INFO L226 Difference]: Without dead ends: 476 [2022-01-18 15:09:10,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:09:10,313 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:10,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 180 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 558 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2022-01-18 15:09:10,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-18 15:09:10,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 342. [2022-01-18 15:09:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.029325513196481) internal successors, (1033), 341 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1033 transitions. [2022-01-18 15:09:10,318 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1033 transitions. Word has length 20 [2022-01-18 15:09:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:10,318 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1033 transitions. [2022-01-18 15:09:10,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1033 transitions. [2022-01-18 15:09:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:10,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:10,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:10,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:10,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:10,519 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:10,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:10,519 INFO L85 PathProgramCache]: Analyzing trace with hash -411132905, now seen corresponding path program 54 times [2022-01-18 15:09:10,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:10,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593303599] [2022-01-18 15:09:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:10,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:10,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:10,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593303599] [2022-01-18 15:09:10,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593303599] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:10,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441395413] [2022-01-18 15:09:10,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:09:10,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:10,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:10,692 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:10,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 15:09:10,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:09:10,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:10,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:10,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:10,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:11,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:11,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:11,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:11,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:11,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:11,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:11,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:11,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:11,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:11,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:11,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:11,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441395413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:11,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:11,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:09:11,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836873886] [2022-01-18 15:09:11,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:11,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:09:11,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:11,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:09:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:09:11,415 INFO L87 Difference]: Start difference. First operand 342 states and 1033 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:11,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:11,686 INFO L93 Difference]: Finished difference Result 475 states and 1411 transitions. [2022-01-18 15:09:11,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:09:11,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:11,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:11,687 INFO L225 Difference]: With dead ends: 475 [2022-01-18 15:09:11,687 INFO L226 Difference]: Without dead ends: 445 [2022-01-18 15:09:11,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:09:11,687 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:11,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 180 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 655 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-18 15:09:11,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-18 15:09:11,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 346. [2022-01-18 15:09:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.0405797101449274) internal successors, (1049), 345 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1049 transitions. [2022-01-18 15:09:11,693 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1049 transitions. Word has length 20 [2022-01-18 15:09:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:11,693 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 1049 transitions. [2022-01-18 15:09:11,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1049 transitions. [2022-01-18 15:09:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:11,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:11,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:11,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:11,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:11,894 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:11,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:11,894 INFO L85 PathProgramCache]: Analyzing trace with hash 175782697, now seen corresponding path program 55 times [2022-01-18 15:09:11,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:11,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210561040] [2022-01-18 15:09:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:11,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:12,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:12,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210561040] [2022-01-18 15:09:12,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210561040] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:12,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67379167] [2022-01-18 15:09:12,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:09:12,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:12,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:12,043 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:12,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 15:09:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:12,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:12,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:12,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:12,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:12,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:12,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:12,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:12,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:12,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:12,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:12,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:12,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:12,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:12,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:12,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:12,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67379167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:12,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:12,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:12,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944170375] [2022-01-18 15:09:12,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:12,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:12,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:12,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:12,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:12,626 INFO L87 Difference]: Start difference. First operand 346 states and 1049 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:12,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:12,901 INFO L93 Difference]: Finished difference Result 530 states and 1546 transitions. [2022-01-18 15:09:12,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:09:12,902 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:12,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:12,903 INFO L225 Difference]: With dead ends: 530 [2022-01-18 15:09:12,903 INFO L226 Difference]: Without dead ends: 500 [2022-01-18 15:09:12,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:09:12,904 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:12,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 202 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 573 Invalid, 0 Unknown, 23 Unchecked, 0.2s Time] [2022-01-18 15:09:12,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-01-18 15:09:12,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 350. [2022-01-18 15:09:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.0401146131805157) internal successors, (1061), 349 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1061 transitions. [2022-01-18 15:09:12,911 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1061 transitions. Word has length 20 [2022-01-18 15:09:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:12,911 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1061 transitions. [2022-01-18 15:09:12,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1061 transitions. [2022-01-18 15:09:12,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:12,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:12,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:12,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:13,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:13,112 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:13,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1614252159, now seen corresponding path program 56 times [2022-01-18 15:09:13,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:13,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598321661] [2022-01-18 15:09:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:13,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:13,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598321661] [2022-01-18 15:09:13,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598321661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726400592] [2022-01-18 15:09:13,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:09:13,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:13,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:13,330 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:13,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 15:09:13,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:09:13,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:13,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:13,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:13,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:13,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:13,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:13,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:13,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:13,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:13,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:13,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:13,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:13,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:13,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:13,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:13,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726400592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:13,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:13,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:09:13,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451936164] [2022-01-18 15:09:13,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:13,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:09:13,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:13,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:09:13,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:09:13,764 INFO L87 Difference]: Start difference. First operand 350 states and 1061 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:14,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:14,081 INFO L93 Difference]: Finished difference Result 458 states and 1363 transitions. [2022-01-18 15:09:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:09:14,081 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:14,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:14,082 INFO L225 Difference]: With dead ends: 458 [2022-01-18 15:09:14,082 INFO L226 Difference]: Without dead ends: 451 [2022-01-18 15:09:14,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:09:14,083 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:14,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 164 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 607 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-01-18 15:09:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-01-18 15:09:14,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 351. [2022-01-18 15:09:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.04) internal successors, (1064), 350 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:14,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1064 transitions. [2022-01-18 15:09:14,087 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1064 transitions. Word has length 20 [2022-01-18 15:09:14,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:14,087 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1064 transitions. [2022-01-18 15:09:14,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:14,087 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1064 transitions. [2022-01-18 15:09:14,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:14,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:14,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:14,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:14,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:14,289 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:14,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2093799535, now seen corresponding path program 57 times [2022-01-18 15:09:14,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:14,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198591463] [2022-01-18 15:09:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:14,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:14,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:14,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198591463] [2022-01-18 15:09:14,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198591463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:14,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953299362] [2022-01-18 15:09:14,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:09:14,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:14,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:14,472 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:14,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 15:09:14,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:09:14,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:14,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:14,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:14,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:14,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:14,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:14,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:14,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:14,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:14,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:15,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:15,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:15,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:15,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:15,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:15,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:15,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953299362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:15,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:15,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:15,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133684460] [2022-01-18 15:09:15,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:15,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:15,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:15,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:15,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:15,181 INFO L87 Difference]: Start difference. First operand 351 states and 1064 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:15,480 INFO L93 Difference]: Finished difference Result 513 states and 1498 transitions. [2022-01-18 15:09:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:09:15,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:15,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:15,482 INFO L225 Difference]: With dead ends: 513 [2022-01-18 15:09:15,482 INFO L226 Difference]: Without dead ends: 499 [2022-01-18 15:09:15,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:09:15,482 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:15,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 199 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 544 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-01-18 15:09:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-18 15:09:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 353. [2022-01-18 15:09:15,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.034090909090909) internal successors, (1068), 352 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1068 transitions. [2022-01-18 15:09:15,490 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1068 transitions. Word has length 20 [2022-01-18 15:09:15,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:15,490 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1068 transitions. [2022-01-18 15:09:15,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:15,490 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1068 transitions. [2022-01-18 15:09:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:15,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:15,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:15,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:15,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 15:09:15,713 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:15,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:15,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1525785833, now seen corresponding path program 58 times [2022-01-18 15:09:15,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:15,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992584565] [2022-01-18 15:09:15,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:15,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:15,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:15,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992584565] [2022-01-18 15:09:15,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992584565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:15,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667531370] [2022-01-18 15:09:15,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:09:15,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:15,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:15,860 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:15,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 15:09:15,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:09:15,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:15,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:16,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:16,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:16,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:16,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:16,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:16,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:16,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:16,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:16,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:16,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:16,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:16,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:16,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:16,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667531370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:16,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:16,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:16,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213488901] [2022-01-18 15:09:16,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:16,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:16,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:16,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:16,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:16,637 INFO L87 Difference]: Start difference. First operand 353 states and 1068 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:16,893 INFO L93 Difference]: Finished difference Result 508 states and 1486 transitions. [2022-01-18 15:09:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:09:16,893 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:16,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:16,894 INFO L225 Difference]: With dead ends: 508 [2022-01-18 15:09:16,894 INFO L226 Difference]: Without dead ends: 502 [2022-01-18 15:09:16,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:09:16,895 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:16,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 216 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 526 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-01-18 15:09:16,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-01-18 15:09:16,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 342. [2022-01-18 15:09:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0410557184750733) internal successors, (1037), 341 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1037 transitions. [2022-01-18 15:09:16,900 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1037 transitions. Word has length 20 [2022-01-18 15:09:16,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:16,900 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1037 transitions. [2022-01-18 15:09:16,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:16,900 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1037 transitions. [2022-01-18 15:09:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:16,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:16,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:16,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:17,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 15:09:17,101 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:17,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1725484703, now seen corresponding path program 59 times [2022-01-18 15:09:17,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:17,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472807620] [2022-01-18 15:09:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:17,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:17,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:17,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472807620] [2022-01-18 15:09:17,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472807620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:17,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741878111] [2022-01-18 15:09:17,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:09:17,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:17,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:17,275 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:17,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 15:09:17,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:09:17,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:17,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:17,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:17,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:17,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:17,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:17,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:17,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:17,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:17,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:17,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:17,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:17,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:17,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:17,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:17,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:18,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741878111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:18,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:18,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:18,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341384108] [2022-01-18 15:09:18,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:18,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:18,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:18,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:18,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:18,017 INFO L87 Difference]: Start difference. First operand 342 states and 1037 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:18,327 INFO L93 Difference]: Finished difference Result 492 states and 1462 transitions. [2022-01-18 15:09:18,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:09:18,327 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:18,328 INFO L225 Difference]: With dead ends: 492 [2022-01-18 15:09:18,328 INFO L226 Difference]: Without dead ends: 477 [2022-01-18 15:09:18,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:09:18,329 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:18,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 200 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 559 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-01-18 15:09:18,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-18 15:09:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 345. [2022-01-18 15:09:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.046511627906977) internal successors, (1048), 344 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1048 transitions. [2022-01-18 15:09:18,337 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1048 transitions. Word has length 20 [2022-01-18 15:09:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:18,337 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1048 transitions. [2022-01-18 15:09:18,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1048 transitions. [2022-01-18 15:09:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:18,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:18,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:18,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-18 15:09:18,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:18,539 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:18,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:18,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1994359795, now seen corresponding path program 60 times [2022-01-18 15:09:18,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:18,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736422274] [2022-01-18 15:09:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:18,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:18,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:18,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736422274] [2022-01-18 15:09:18,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736422274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:18,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173607737] [2022-01-18 15:09:18,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:09:18,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:18,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:18,721 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:18,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 15:09:18,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:09:18,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:18,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:18,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:18,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:18,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:19,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:19,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:19,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:19,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:19,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:19,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:19,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:19,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:19,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:19,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:19,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:19,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173607737] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:19,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:19,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:19,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440040610] [2022-01-18 15:09:19,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:19,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:19,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:19,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:19,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:19,397 INFO L87 Difference]: Start difference. First operand 345 states and 1048 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:19,709 INFO L93 Difference]: Finished difference Result 532 states and 1547 transitions. [2022-01-18 15:09:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:09:19,710 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:19,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:19,711 INFO L225 Difference]: With dead ends: 532 [2022-01-18 15:09:19,711 INFO L226 Difference]: Without dead ends: 502 [2022-01-18 15:09:19,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:09:19,711 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:19,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 213 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 604 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-01-18 15:09:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-01-18 15:09:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 351. [2022-01-18 15:09:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0342857142857143) internal successors, (1062), 350 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1062 transitions. [2022-01-18 15:09:19,718 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1062 transitions. Word has length 20 [2022-01-18 15:09:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:19,718 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1062 transitions. [2022-01-18 15:09:19,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1062 transitions. [2022-01-18 15:09:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:19,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:19,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:19,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:19,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:19,919 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:19,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:19,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1318977867, now seen corresponding path program 61 times [2022-01-18 15:09:19,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:19,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819819797] [2022-01-18 15:09:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:19,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:20,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:20,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819819797] [2022-01-18 15:09:20,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819819797] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:20,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084335961] [2022-01-18 15:09:20,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:09:20,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:20,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:20,054 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:20,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 15:09:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:20,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:20,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:20,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:20,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:20,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:20,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:20,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:20,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:20,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:20,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:20,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:20,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:20,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:20,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:20,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:21,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084335961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:21,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:21,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:21,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649414314] [2022-01-18 15:09:21,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:21,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:21,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:21,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:21,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:21,046 INFO L87 Difference]: Start difference. First operand 351 states and 1062 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:21,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:21,366 INFO L93 Difference]: Finished difference Result 505 states and 1480 transitions. [2022-01-18 15:09:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:09:21,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:21,368 INFO L225 Difference]: With dead ends: 505 [2022-01-18 15:09:21,368 INFO L226 Difference]: Without dead ends: 499 [2022-01-18 15:09:21,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:09:21,369 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:21,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 205 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 531 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-01-18 15:09:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-18 15:09:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 338. [2022-01-18 15:09:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.029673590504451) internal successors, (1021), 337 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1021 transitions. [2022-01-18 15:09:21,387 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1021 transitions. Word has length 20 [2022-01-18 15:09:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:21,387 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1021 transitions. [2022-01-18 15:09:21,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1021 transitions. [2022-01-18 15:09:21,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:21,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:21,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:21,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:21,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:21,615 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2085003543, now seen corresponding path program 62 times [2022-01-18 15:09:21,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:21,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873531467] [2022-01-18 15:09:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:21,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:21,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:21,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873531467] [2022-01-18 15:09:21,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873531467] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:21,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471072644] [2022-01-18 15:09:21,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:09:21,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:21,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:21,800 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:21,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 15:09:21,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:09:21,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:21,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:21,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:21,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:21,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:22,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:22,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:22,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:22,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:22,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:22,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:22,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:22,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:22,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:22,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:22,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:22,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471072644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:22,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:22,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:22,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830085185] [2022-01-18 15:09:22,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:22,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:22,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:22,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:22,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:22,390 INFO L87 Difference]: Start difference. First operand 338 states and 1021 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:22,670 INFO L93 Difference]: Finished difference Result 505 states and 1502 transitions. [2022-01-18 15:09:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:09:22,670 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:22,671 INFO L225 Difference]: With dead ends: 505 [2022-01-18 15:09:22,671 INFO L226 Difference]: Without dead ends: 490 [2022-01-18 15:09:22,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:09:22,671 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:22,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 197 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 478 Invalid, 0 Unknown, 161 Unchecked, 0.2s Time] [2022-01-18 15:09:22,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-18 15:09:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 342. [2022-01-18 15:09:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0410557184750733) internal successors, (1037), 341 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:22,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1037 transitions. [2022-01-18 15:09:22,678 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1037 transitions. Word has length 20 [2022-01-18 15:09:22,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:22,678 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1037 transitions. [2022-01-18 15:09:22,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:22,679 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1037 transitions. [2022-01-18 15:09:22,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:22,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:22,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:22,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 15:09:22,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:22,902 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:22,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:22,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1308119287, now seen corresponding path program 63 times [2022-01-18 15:09:22,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:22,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798180212] [2022-01-18 15:09:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:22,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:23,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:23,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798180212] [2022-01-18 15:09:23,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798180212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:23,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584982294] [2022-01-18 15:09:23,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:09:23,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:23,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:23,043 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:23,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 15:09:23,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:09:23,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:23,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:23,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:23,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:23,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:23,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:23,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:23,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:23,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:23,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:23,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:23,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:23,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:23,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:23,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:23,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:23,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584982294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:23,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:23,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:23,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037794248] [2022-01-18 15:09:23,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:23,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:23,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:23,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:23,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:23,552 INFO L87 Difference]: Start difference. First operand 342 states and 1037 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:23,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:23,808 INFO L93 Difference]: Finished difference Result 524 states and 1550 transitions. [2022-01-18 15:09:23,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:09:23,808 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:23,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:23,809 INFO L225 Difference]: With dead ends: 524 [2022-01-18 15:09:23,809 INFO L226 Difference]: Without dead ends: 509 [2022-01-18 15:09:23,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:09:23,809 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:23,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 172 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 388 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-01-18 15:09:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-18 15:09:23,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 340. [2022-01-18 15:09:23,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.03834808259587) internal successors, (1030), 339 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1030 transitions. [2022-01-18 15:09:23,815 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1030 transitions. Word has length 20 [2022-01-18 15:09:23,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:23,815 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1030 transitions. [2022-01-18 15:09:23,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:23,815 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1030 transitions. [2022-01-18 15:09:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:23,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:23,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:23,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:24,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-01-18 15:09:24,016 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:24,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1613857837, now seen corresponding path program 64 times [2022-01-18 15:09:24,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:24,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846776504] [2022-01-18 15:09:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:24,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:24,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:24,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846776504] [2022-01-18 15:09:24,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846776504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:24,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174841483] [2022-01-18 15:09:24,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:09:24,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:24,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:24,162 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:24,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 15:09:24,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:09:24,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:24,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:24,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:24,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:24,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:24,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:24,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:24,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:24,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:24,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:24,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:24,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:24,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:24,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:24,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:24,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:24,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174841483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:24,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:24,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:24,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205926461] [2022-01-18 15:09:24,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:24,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:24,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:24,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:24,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:24,635 INFO L87 Difference]: Start difference. First operand 340 states and 1030 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:24,961 INFO L93 Difference]: Finished difference Result 503 states and 1495 transitions. [2022-01-18 15:09:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:09:24,961 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:24,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:24,962 INFO L225 Difference]: With dead ends: 503 [2022-01-18 15:09:24,962 INFO L226 Difference]: Without dead ends: 488 [2022-01-18 15:09:24,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:09:24,962 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:24,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 189 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 587 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2022-01-18 15:09:24,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-18 15:09:24,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 340. [2022-01-18 15:09:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.03834808259587) internal successors, (1030), 339 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:24,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1030 transitions. [2022-01-18 15:09:24,967 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1030 transitions. Word has length 20 [2022-01-18 15:09:24,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:24,967 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1030 transitions. [2022-01-18 15:09:24,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1030 transitions. [2022-01-18 15:09:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:24,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:24,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:24,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 15:09:25,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:25,168 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:25,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1088357197, now seen corresponding path program 65 times [2022-01-18 15:09:25,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:25,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996701918] [2022-01-18 15:09:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:25,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:25,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:25,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996701918] [2022-01-18 15:09:25,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996701918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:25,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648342426] [2022-01-18 15:09:25,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:09:25,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:25,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:25,344 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:25,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 15:09:25,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:09:25,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:25,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:25,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:25,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:25,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:25,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:25,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:25,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:25,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:25,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:25,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:25,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:25,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:25,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:25,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:25,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:26,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648342426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:26,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:26,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:26,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422746642] [2022-01-18 15:09:26,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:26,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:26,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:26,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:26,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:26,007 INFO L87 Difference]: Start difference. First operand 340 states and 1030 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:26,472 INFO L93 Difference]: Finished difference Result 534 states and 1578 transitions. [2022-01-18 15:09:26,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:09:26,472 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:26,473 INFO L225 Difference]: With dead ends: 534 [2022-01-18 15:09:26,474 INFO L226 Difference]: Without dead ends: 519 [2022-01-18 15:09:26,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:09:26,474 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:26,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 208 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 549 Invalid, 0 Unknown, 156 Unchecked, 0.3s Time] [2022-01-18 15:09:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-18 15:09:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 342. [2022-01-18 15:09:26,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0410557184750733) internal successors, (1037), 341 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1037 transitions. [2022-01-18 15:09:26,480 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1037 transitions. Word has length 20 [2022-01-18 15:09:26,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:26,480 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1037 transitions. [2022-01-18 15:09:26,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:26,480 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1037 transitions. [2022-01-18 15:09:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:26,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:26,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:26,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 15:09:26,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-01-18 15:09:26,687 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:26,688 INFO L85 PathProgramCache]: Analyzing trace with hash -99296649, now seen corresponding path program 66 times [2022-01-18 15:09:26,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:26,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289059571] [2022-01-18 15:09:26,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:26,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:26,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:26,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289059571] [2022-01-18 15:09:26,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289059571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:26,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94354747] [2022-01-18 15:09:26,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:09:26,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:26,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:26,880 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:26,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 15:09:26,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:09:26,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:26,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:26,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:26,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:26,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:27,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:27,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:27,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:27,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:27,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:27,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:27,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:27,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:27,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:27,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:27,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:27,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94354747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:27,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:27,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:27,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165344742] [2022-01-18 15:09:27,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:27,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:27,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:27,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:27,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:27,447 INFO L87 Difference]: Start difference. First operand 342 states and 1037 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:27,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:27,879 INFO L93 Difference]: Finished difference Result 528 states and 1563 transitions. [2022-01-18 15:09:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:09:27,879 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:27,880 INFO L225 Difference]: With dead ends: 528 [2022-01-18 15:09:27,880 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 15:09:27,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:09:27,880 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:27,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 191 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 521 Invalid, 0 Unknown, 157 Unchecked, 0.2s Time] [2022-01-18 15:09:27,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 15:09:27,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 339. [2022-01-18 15:09:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.032544378698225) internal successors, (1025), 338 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1025 transitions. [2022-01-18 15:09:27,887 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1025 transitions. Word has length 20 [2022-01-18 15:09:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:27,887 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1025 transitions. [2022-01-18 15:09:27,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1025 transitions. [2022-01-18 15:09:27,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:27,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:27,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:27,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:28,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-18 15:09:28,103 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2106453599, now seen corresponding path program 67 times [2022-01-18 15:09:28,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:28,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747486514] [2022-01-18 15:09:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:28,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:28,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:28,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747486514] [2022-01-18 15:09:28,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747486514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:28,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029949612] [2022-01-18 15:09:28,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:09:28,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:28,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:28,255 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:28,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 15:09:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:28,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:28,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:28,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:28,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:28,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:28,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:28,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:28,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:28,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:28,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:28,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:28,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:28,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:28,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:28,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029949612] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:28,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:28,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:28,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199596743] [2022-01-18 15:09:28,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:28,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:28,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:28,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:28,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:28,697 INFO L87 Difference]: Start difference. First operand 339 states and 1025 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:28,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:28,997 INFO L93 Difference]: Finished difference Result 482 states and 1433 transitions. [2022-01-18 15:09:28,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:09:28,997 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:28,998 INFO L225 Difference]: With dead ends: 482 [2022-01-18 15:09:28,998 INFO L226 Difference]: Without dead ends: 467 [2022-01-18 15:09:28,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:09:28,999 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:28,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 195 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 606 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-18 15:09:28,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-18 15:09:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 344. [2022-01-18 15:09:29,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.0379008746355685) internal successors, (1042), 343 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1042 transitions. [2022-01-18 15:09:29,003 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1042 transitions. Word has length 20 [2022-01-18 15:09:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:29,003 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1042 transitions. [2022-01-18 15:09:29,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:29,004 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1042 transitions. [2022-01-18 15:09:29,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:29,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:29,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:29,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 15:09:29,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-18 15:09:29,205 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:29,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:29,206 INFO L85 PathProgramCache]: Analyzing trace with hash 664706613, now seen corresponding path program 68 times [2022-01-18 15:09:29,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:29,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458318263] [2022-01-18 15:09:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:29,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:29,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:29,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458318263] [2022-01-18 15:09:29,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458318263] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:29,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32750651] [2022-01-18 15:09:29,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:09:29,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:29,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:29,340 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:29,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 15:09:29,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:09:29,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:29,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:29,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:29,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:29,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:29,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:29,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:29,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:29,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:29,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:29,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:29,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:29,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:29,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:29,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:29,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:29,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32750651] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:29,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:29,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:29,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965742785] [2022-01-18 15:09:29,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:29,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:29,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:29,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:29,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:29,893 INFO L87 Difference]: Start difference. First operand 344 states and 1042 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:30,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:30,194 INFO L93 Difference]: Finished difference Result 494 states and 1467 transitions. [2022-01-18 15:09:30,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:09:30,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:30,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:30,195 INFO L225 Difference]: With dead ends: 494 [2022-01-18 15:09:30,195 INFO L226 Difference]: Without dead ends: 479 [2022-01-18 15:09:30,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:09:30,196 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:30,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 176 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 520 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-01-18 15:09:30,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-18 15:09:30,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 347. [2022-01-18 15:09:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0433526011560694) internal successors, (1053), 346 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1053 transitions. [2022-01-18 15:09:30,200 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1053 transitions. Word has length 20 [2022-01-18 15:09:30,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:30,200 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1053 transitions. [2022-01-18 15:09:30,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:30,200 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1053 transitions. [2022-01-18 15:09:30,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:30,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:30,201 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:30,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 15:09:30,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-18 15:09:30,401 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:30,402 INFO L85 PathProgramCache]: Analyzing trace with hash 933581705, now seen corresponding path program 69 times [2022-01-18 15:09:30,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:30,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079979070] [2022-01-18 15:09:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:30,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:30,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:30,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079979070] [2022-01-18 15:09:30,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079979070] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:30,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385752910] [2022-01-18 15:09:30,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:09:30,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:30,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:30,564 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:30,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 15:09:30,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:09:30,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:09:30,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:30,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:30,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:30,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:30,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:30,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:30,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:31,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:31,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:31,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-18 15:09:31,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:31,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-01-18 15:09:31,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:31,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 15:09:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:31,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385752910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:31,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:31,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:31,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603323413] [2022-01-18 15:09:31,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:31,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:31,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:31,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:31,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:31,326 INFO L87 Difference]: Start difference. First operand 347 states and 1053 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:31,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:31,852 INFO L93 Difference]: Finished difference Result 613 states and 1814 transitions. [2022-01-18 15:09:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:09:31,853 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:31,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:31,853 INFO L225 Difference]: With dead ends: 613 [2022-01-18 15:09:31,853 INFO L226 Difference]: Without dead ends: 568 [2022-01-18 15:09:31,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:09:31,854 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 52 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:31,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 276 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 767 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-01-18 15:09:31,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-18 15:09:31,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 361. [2022-01-18 15:09:31,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.022222222222222) internal successors, (1088), 360 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1088 transitions. [2022-01-18 15:09:31,859 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1088 transitions. Word has length 20 [2022-01-18 15:09:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:31,859 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 1088 transitions. [2022-01-18 15:09:31,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1088 transitions. [2022-01-18 15:09:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:31,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:31,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:31,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-18 15:09:32,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:32,060 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:32,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:32,060 INFO L85 PathProgramCache]: Analyzing trace with hash 258199777, now seen corresponding path program 70 times [2022-01-18 15:09:32,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:32,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457971322] [2022-01-18 15:09:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:32,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:32,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:32,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457971322] [2022-01-18 15:09:32,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457971322] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:32,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323267494] [2022-01-18 15:09:32,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:09:32,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:32,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:32,197 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:32,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 15:09:32,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:09:32,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:32,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:32,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:32,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:32,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:32,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:32,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:32,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:32,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:32,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:32,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:32,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:32,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:32,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:32,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:32,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323267494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:32,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:32,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:32,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440365464] [2022-01-18 15:09:32,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:32,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:32,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:32,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:32,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:32,892 INFO L87 Difference]: Start difference. First operand 361 states and 1088 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:33,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:33,193 INFO L93 Difference]: Finished difference Result 541 states and 1567 transitions. [2022-01-18 15:09:33,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:09:33,193 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:33,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:33,194 INFO L225 Difference]: With dead ends: 541 [2022-01-18 15:09:33,194 INFO L226 Difference]: Without dead ends: 523 [2022-01-18 15:09:33,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:09:33,194 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:33,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 197 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 576 Invalid, 0 Unknown, 131 Unchecked, 0.2s Time] [2022-01-18 15:09:33,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-18 15:09:33,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 351. [2022-01-18 15:09:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0285714285714285) internal successors, (1060), 350 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:33,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1060 transitions. [2022-01-18 15:09:33,199 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1060 transitions. Word has length 20 [2022-01-18 15:09:33,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:33,200 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1060 transitions. [2022-01-18 15:09:33,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1060 transitions. [2022-01-18 15:09:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:33,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:33,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:33,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 15:09:33,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:33,401 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:33,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:33,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1024071433, now seen corresponding path program 71 times [2022-01-18 15:09:33,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:33,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918257018] [2022-01-18 15:09:33,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:33,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:33,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:33,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918257018] [2022-01-18 15:09:33,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918257018] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:33,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275480700] [2022-01-18 15:09:33,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:09:33,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:33,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:33,524 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:33,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 15:09:33,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:09:33,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:33,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:33,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:33,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:33,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:33,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:33,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:33,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:33,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:33,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:33,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:33,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:33,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:33,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:33,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:33,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:34,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275480700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:34,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:34,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:09:34,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897804683] [2022-01-18 15:09:34,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:34,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:09:34,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:34,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:09:34,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:09:34,041 INFO L87 Difference]: Start difference. First operand 351 states and 1060 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:34,255 INFO L93 Difference]: Finished difference Result 515 states and 1537 transitions. [2022-01-18 15:09:34,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:09:34,256 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:34,256 INFO L225 Difference]: With dead ends: 515 [2022-01-18 15:09:34,256 INFO L226 Difference]: Without dead ends: 500 [2022-01-18 15:09:34,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:34,257 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:34,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 174 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 383 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2022-01-18 15:09:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-01-18 15:09:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 353. [2022-01-18 15:09:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.03125) internal successors, (1067), 352 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1067 transitions. [2022-01-18 15:09:34,261 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1067 transitions. Word has length 20 [2022-01-18 15:09:34,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:34,261 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1067 transitions. [2022-01-18 15:09:34,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1067 transitions. [2022-01-18 15:09:34,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:34,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:34,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:34,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:34,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:34,463 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:34,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:34,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2013131981, now seen corresponding path program 72 times [2022-01-18 15:09:34,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:34,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229668026] [2022-01-18 15:09:34,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:34,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:34,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:34,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229668026] [2022-01-18 15:09:34,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229668026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:34,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389677411] [2022-01-18 15:09:34,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:09:34,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:34,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:34,664 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:34,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 15:09:34,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:09:34,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:34,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:34,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:34,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:34,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:34,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:34,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:34,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:34,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:34,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:35,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:35,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:35,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:35,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:09:35,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:35,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:35,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389677411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:35,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:35,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:09:35,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121725927] [2022-01-18 15:09:35,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:35,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:09:35,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:35,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:09:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:09:35,240 INFO L87 Difference]: Start difference. First operand 353 states and 1067 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:35,404 INFO L93 Difference]: Finished difference Result 516 states and 1544 transitions. [2022-01-18 15:09:35,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:09:35,405 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:35,405 INFO L225 Difference]: With dead ends: 516 [2022-01-18 15:09:35,405 INFO L226 Difference]: Without dead ends: 501 [2022-01-18 15:09:35,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:09:35,406 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:35,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 151 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 322 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-01-18 15:09:35,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-18 15:09:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 361. [2022-01-18 15:09:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.0305555555555554) internal successors, (1091), 360 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1091 transitions. [2022-01-18 15:09:35,412 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1091 transitions. Word has length 20 [2022-01-18 15:09:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:35,412 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 1091 transitions. [2022-01-18 15:09:35,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1091 transitions. [2022-01-18 15:09:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:35,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:35,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:35,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-18 15:09:35,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-01-18 15:09:35,614 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:35,614 INFO L85 PathProgramCache]: Analyzing trace with hash -285800781, now seen corresponding path program 73 times [2022-01-18 15:09:35,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:35,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11993398] [2022-01-18 15:09:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:35,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:35,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:35,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11993398] [2022-01-18 15:09:35,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11993398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:35,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870080740] [2022-01-18 15:09:35,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:09:35,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:35,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:35,800 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:35,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 15:09:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:35,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:35,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:35,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:35,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:35,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:36,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:36,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:36,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:36,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:36,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:36,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:36,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870080740] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:36,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:36,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:09:36,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337345388] [2022-01-18 15:09:36,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:36,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:09:36,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:36,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:09:36,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:09:36,239 INFO L87 Difference]: Start difference. First operand 361 states and 1091 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:36,708 INFO L93 Difference]: Finished difference Result 630 states and 1858 transitions. [2022-01-18 15:09:36,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:09:36,709 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:36,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:36,709 INFO L225 Difference]: With dead ends: 630 [2022-01-18 15:09:36,710 INFO L226 Difference]: Without dead ends: 600 [2022-01-18 15:09:36,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:09:36,710 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:36,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 234 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:09:36,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-18 15:09:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 376. [2022-01-18 15:09:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.04) internal successors, (1140), 375 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1140 transitions. [2022-01-18 15:09:36,716 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1140 transitions. Word has length 20 [2022-01-18 15:09:36,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:36,716 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1140 transitions. [2022-01-18 15:09:36,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:36,717 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1140 transitions. [2022-01-18 15:09:36,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:36,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:36,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:36,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:36,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:36,938 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:36,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:36,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1961811571, now seen corresponding path program 74 times [2022-01-18 15:09:36,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:36,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198523685] [2022-01-18 15:09:36,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:36,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:37,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:37,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198523685] [2022-01-18 15:09:37,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198523685] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:37,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182883312] [2022-01-18 15:09:37,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:09:37,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:37,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:37,206 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:37,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 15:09:37,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:09:37,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:37,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:37,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:37,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:37,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:37,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:37,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:37,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:37,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:37,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:37,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:37,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:37,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182883312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:37,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:37,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:09:37,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20304850] [2022-01-18 15:09:37,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:37,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:09:37,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:37,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:09:37,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:09:37,689 INFO L87 Difference]: Start difference. First operand 376 states and 1140 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:38,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:38,237 INFO L93 Difference]: Finished difference Result 648 states and 1901 transitions. [2022-01-18 15:09:38,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:09:38,238 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:38,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:38,238 INFO L225 Difference]: With dead ends: 648 [2022-01-18 15:09:38,238 INFO L226 Difference]: Without dead ends: 618 [2022-01-18 15:09:38,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:09:38,239 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:38,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 294 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:09:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-18 15:09:38,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 372. [2022-01-18 15:09:38,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.0296495956873315) internal successors, (1124), 371 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1124 transitions. [2022-01-18 15:09:38,244 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1124 transitions. Word has length 20 [2022-01-18 15:09:38,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:38,244 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1124 transitions. [2022-01-18 15:09:38,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1124 transitions. [2022-01-18 15:09:38,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:38,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:38,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:38,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:38,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:38,446 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:38,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:38,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1618004055, now seen corresponding path program 75 times [2022-01-18 15:09:38,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:38,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915760702] [2022-01-18 15:09:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:38,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:38,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:38,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915760702] [2022-01-18 15:09:38,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915760702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:38,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894089802] [2022-01-18 15:09:38,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:09:38,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:38,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:38,676 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:38,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 15:09:38,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:09:38,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:38,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:38,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:38,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:38,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:38,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:38,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:38,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:39,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:39,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:39,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:39,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:39,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894089802] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:39,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:39,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:09:39,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268205245] [2022-01-18 15:09:39,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:39,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:09:39,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:39,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:09:39,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:09:39,141 INFO L87 Difference]: Start difference. First operand 372 states and 1124 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:39,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:39,698 INFO L93 Difference]: Finished difference Result 556 states and 1646 transitions. [2022-01-18 15:09:39,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:09:39,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:39,699 INFO L225 Difference]: With dead ends: 556 [2022-01-18 15:09:39,699 INFO L226 Difference]: Without dead ends: 526 [2022-01-18 15:09:39,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:09:39,700 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:39,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 222 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:09:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-18 15:09:39,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 368. [2022-01-18 15:09:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0299727520435966) internal successors, (1112), 367 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1112 transitions. [2022-01-18 15:09:39,706 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1112 transitions. Word has length 20 [2022-01-18 15:09:39,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:39,706 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1112 transitions. [2022-01-18 15:09:39,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1112 transitions. [2022-01-18 15:09:39,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:39,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:39,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:39,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 15:09:39,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-01-18 15:09:39,931 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:39,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1541229005, now seen corresponding path program 76 times [2022-01-18 15:09:39,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:39,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137951783] [2022-01-18 15:09:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:39,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:40,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:40,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137951783] [2022-01-18 15:09:40,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137951783] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:40,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984347018] [2022-01-18 15:09:40,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:09:40,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:40,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:40,057 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:40,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 15:09:40,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:09:40,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:40,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:40,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:40,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:40,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:40,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:40,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:40,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:40,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:40,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:40,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:40,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:40,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984347018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:40,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:40,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:09:40,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364135130] [2022-01-18 15:09:40,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:40,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:09:40,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:40,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:09:40,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:09:40,471 INFO L87 Difference]: Start difference. First operand 368 states and 1112 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:41,007 INFO L93 Difference]: Finished difference Result 792 states and 2298 transitions. [2022-01-18 15:09:41,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:09:41,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:41,009 INFO L225 Difference]: With dead ends: 792 [2022-01-18 15:09:41,009 INFO L226 Difference]: Without dead ends: 762 [2022-01-18 15:09:41,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:09:41,009 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 107 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:41,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 221 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:09:41,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-18 15:09:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 361. [2022-01-18 15:09:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.0305555555555554) internal successors, (1091), 360 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1091 transitions. [2022-01-18 15:09:41,016 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1091 transitions. Word has length 20 [2022-01-18 15:09:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:41,016 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 1091 transitions. [2022-01-18 15:09:41,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1091 transitions. [2022-01-18 15:09:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:41,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:41,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:41,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-18 15:09:41,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-01-18 15:09:41,218 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:41,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:41,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1941217325, now seen corresponding path program 77 times [2022-01-18 15:09:41,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:41,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122946774] [2022-01-18 15:09:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:41,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:41,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:41,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122946774] [2022-01-18 15:09:41,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122946774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:41,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456448234] [2022-01-18 15:09:41,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:09:41,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:41,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:41,350 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:41,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 15:09:41,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:09:41,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:41,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:09:41,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:41,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:41,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-01-18 15:09:41,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 15:09:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:41,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:41,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:41,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:42,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:42,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:09:42,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:42,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:09:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:42,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456448234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:42,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:42,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:09:42,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569762026] [2022-01-18 15:09:42,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:42,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:09:42,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:42,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:09:42,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:09:42,175 INFO L87 Difference]: Start difference. First operand 361 states and 1091 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:42,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:42,926 INFO L93 Difference]: Finished difference Result 603 states and 1775 transitions. [2022-01-18 15:09:42,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:09:42,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:42,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:42,927 INFO L225 Difference]: With dead ends: 603 [2022-01-18 15:09:42,927 INFO L226 Difference]: Without dead ends: 573 [2022-01-18 15:09:42,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:09:42,927 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:42,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 233 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:09:42,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-18 15:09:42,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 374. [2022-01-18 15:09:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.0428954423592494) internal successors, (1135), 373 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1135 transitions. [2022-01-18 15:09:42,932 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1135 transitions. Word has length 20 [2022-01-18 15:09:42,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:42,932 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1135 transitions. [2022-01-18 15:09:42,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1135 transitions. [2022-01-18 15:09:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:42,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:42,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:42,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-18 15:09:43,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:43,134 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:43,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:43,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1345111409, now seen corresponding path program 78 times [2022-01-18 15:09:43,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:43,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657617553] [2022-01-18 15:09:43,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:43,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:43,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:43,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657617553] [2022-01-18 15:09:43,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657617553] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:43,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610084650] [2022-01-18 15:09:43,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:09:43,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:43,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:43,262 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:43,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 15:09:43,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:09:43,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:43,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:43,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:43,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:43,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:43,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:43,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:43,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:09:43,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:43,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:43,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:43,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:43,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610084650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:43,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:43,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:09:43,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643577697] [2022-01-18 15:09:43,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:43,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:09:43,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:43,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:09:43,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:09:43,693 INFO L87 Difference]: Start difference. First operand 374 states and 1135 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:44,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:44,129 INFO L93 Difference]: Finished difference Result 580 states and 1719 transitions. [2022-01-18 15:09:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:09:44,130 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:44,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:44,130 INFO L225 Difference]: With dead ends: 580 [2022-01-18 15:09:44,131 INFO L226 Difference]: Without dead ends: 565 [2022-01-18 15:09:44,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:09:44,131 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:44,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 210 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:09:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-18 15:09:44,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 374. [2022-01-18 15:09:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.0428954423592494) internal successors, (1135), 373 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:44,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1135 transitions. [2022-01-18 15:09:44,136 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1135 transitions. Word has length 20 [2022-01-18 15:09:44,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:44,136 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1135 transitions. [2022-01-18 15:09:44,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:44,136 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1135 transitions. [2022-01-18 15:09:44,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:44,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:44,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:44,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-18 15:09:44,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:44,337 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:44,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:44,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1837707171, now seen corresponding path program 79 times [2022-01-18 15:09:44,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:44,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787036770] [2022-01-18 15:09:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:44,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:44,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:44,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787036770] [2022-01-18 15:09:44,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787036770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:44,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773455784] [2022-01-18 15:09:44,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:09:44,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:44,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:44,608 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:44,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 15:09:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:44,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:44,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:44,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:44,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:44,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:44,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:44,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:45,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:45,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:45,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:45,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:45,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773455784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:45,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:45,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:09:45,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165976173] [2022-01-18 15:09:45,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:45,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:09:45,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:45,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:09:45,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:09:45,097 INFO L87 Difference]: Start difference. First operand 374 states and 1135 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:45,470 INFO L93 Difference]: Finished difference Result 537 states and 1600 transitions. [2022-01-18 15:09:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:09:45,471 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:45,472 INFO L225 Difference]: With dead ends: 537 [2022-01-18 15:09:45,472 INFO L226 Difference]: Without dead ends: 522 [2022-01-18 15:09:45,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:09:45,472 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:45,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 199 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:09:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-01-18 15:09:45,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 374. [2022-01-18 15:09:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.0428954423592494) internal successors, (1135), 373 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1135 transitions. [2022-01-18 15:09:45,477 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1135 transitions. Word has length 20 [2022-01-18 15:09:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:45,477 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1135 transitions. [2022-01-18 15:09:45,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1135 transitions. [2022-01-18 15:09:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:45,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:45,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:45,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-01-18 15:09:45,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:45,678 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:45,678 INFO L85 PathProgramCache]: Analyzing trace with hash -352617845, now seen corresponding path program 80 times [2022-01-18 15:09:45,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:45,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356363099] [2022-01-18 15:09:45,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:45,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:45,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:45,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356363099] [2022-01-18 15:09:45,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356363099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:45,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924255025] [2022-01-18 15:09:45,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:09:45,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:45,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:45,795 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:45,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 15:09:45,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:09:45,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:45,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:45,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:45,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:45,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:09:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:45,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:46,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:46,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:46,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:46,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:09:46,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:46,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:46,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924255025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:46,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:46,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:09:46,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944360582] [2022-01-18 15:09:46,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:46,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:09:46,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:46,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:09:46,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:09:46,184 INFO L87 Difference]: Start difference. First operand 374 states and 1135 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:46,601 INFO L93 Difference]: Finished difference Result 645 states and 1917 transitions. [2022-01-18 15:09:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:09:46,601 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:46,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:46,602 INFO L225 Difference]: With dead ends: 645 [2022-01-18 15:09:46,602 INFO L226 Difference]: Without dead ends: 630 [2022-01-18 15:09:46,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:09:46,602 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:46,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 182 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:09:46,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-01-18 15:09:46,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 374. [2022-01-18 15:09:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.0428954423592494) internal successors, (1135), 373 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1135 transitions. [2022-01-18 15:09:46,610 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1135 transitions. Word has length 20 [2022-01-18 15:09:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:46,610 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1135 transitions. [2022-01-18 15:09:46,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:46,610 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1135 transitions. [2022-01-18 15:09:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:46,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:46,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:46,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-18 15:09:46,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:46,815 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:46,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:46,816 INFO L85 PathProgramCache]: Analyzing trace with hash 265545737, now seen corresponding path program 81 times [2022-01-18 15:09:46,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:46,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94427878] [2022-01-18 15:09:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:46,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:46,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:46,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94427878] [2022-01-18 15:09:46,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94427878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:46,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263511287] [2022-01-18 15:09:46,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:09:46,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:46,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:46,932 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:46,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 15:09:46,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:09:46,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:46,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:46,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:47,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:47,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:47,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:47,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:47,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:47,359 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:09:47,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 15:09:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:47,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263511287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:47,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:47,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-01-18 15:09:47,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861658374] [2022-01-18 15:09:47,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:47,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:09:47,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:47,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:09:47,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:09:47,369 INFO L87 Difference]: Start difference. First operand 374 states and 1135 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:48,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:48,369 INFO L93 Difference]: Finished difference Result 860 states and 2541 transitions. [2022-01-18 15:09:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:09:48,369 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:48,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:48,371 INFO L225 Difference]: With dead ends: 860 [2022-01-18 15:09:48,371 INFO L226 Difference]: Without dead ends: 845 [2022-01-18 15:09:48,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=451, Invalid=1805, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:09:48,371 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 303 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:48,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 267 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:09:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-01-18 15:09:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 380. [2022-01-18 15:09:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.0422163588390503) internal successors, (1153), 379 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1153 transitions. [2022-01-18 15:09:48,377 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1153 transitions. Word has length 20 [2022-01-18 15:09:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:48,377 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1153 transitions. [2022-01-18 15:09:48,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:48,377 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1153 transitions. [2022-01-18 15:09:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:48,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:48,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:48,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-18 15:09:48,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:48,578 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:48,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:48,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1677154455, now seen corresponding path program 82 times [2022-01-18 15:09:48,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:48,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873593089] [2022-01-18 15:09:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:48,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:48,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:48,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873593089] [2022-01-18 15:09:48,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873593089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:48,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032565437] [2022-01-18 15:09:48,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:09:48,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:48,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:48,672 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:48,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 15:09:48,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:09:48,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:48,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:48,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:48,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:48,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:48,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:48,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:48,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:49,000 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:09:49,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 15:09:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:49,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032565437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:49,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:49,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:49,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35459568] [2022-01-18 15:09:49,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:49,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:49,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:49,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:49,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:49,015 INFO L87 Difference]: Start difference. First operand 380 states and 1153 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:49,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:49,562 INFO L93 Difference]: Finished difference Result 778 states and 2304 transitions. [2022-01-18 15:09:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:09:49,562 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:49,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:49,563 INFO L225 Difference]: With dead ends: 778 [2022-01-18 15:09:49,563 INFO L226 Difference]: Without dead ends: 748 [2022-01-18 15:09:49,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:09:49,563 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 149 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:49,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 178 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:09:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-01-18 15:09:49,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 386. [2022-01-18 15:09:49,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.0415584415584416) internal successors, (1171), 385 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1171 transitions. [2022-01-18 15:09:49,569 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1171 transitions. Word has length 20 [2022-01-18 15:09:49,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:49,569 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1171 transitions. [2022-01-18 15:09:49,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:49,569 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1171 transitions. [2022-01-18 15:09:49,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:49,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:49,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:49,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-18 15:09:49,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-01-18 15:09:49,771 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:49,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:49,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1619749641, now seen corresponding path program 83 times [2022-01-18 15:09:49,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:49,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513507974] [2022-01-18 15:09:49,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:49,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:49,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:49,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513507974] [2022-01-18 15:09:49,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513507974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:49,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208103224] [2022-01-18 15:09:49,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:09:49,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:49,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:49,901 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:49,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 15:09:49,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:09:49,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:49,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:49,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:49,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:50,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:50,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:50,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:50,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:50,262 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:09:50,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 15:09:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:50,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208103224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:50,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:50,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-01-18 15:09:50,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651706952] [2022-01-18 15:09:50,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:50,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:09:50,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:50,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:09:50,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:09:50,271 INFO L87 Difference]: Start difference. First operand 386 states and 1171 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:50,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:50,945 INFO L93 Difference]: Finished difference Result 744 states and 2217 transitions. [2022-01-18 15:09:50,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:09:50,946 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:50,947 INFO L225 Difference]: With dead ends: 744 [2022-01-18 15:09:50,947 INFO L226 Difference]: Without dead ends: 729 [2022-01-18 15:09:50,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:09:50,947 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 224 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:50,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 210 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:09:50,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-01-18 15:09:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 383. [2022-01-18 15:09:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.0418848167539267) internal successors, (1162), 382 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1162 transitions. [2022-01-18 15:09:50,953 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1162 transitions. Word has length 20 [2022-01-18 15:09:50,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:50,953 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 1162 transitions. [2022-01-18 15:09:50,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1162 transitions. [2022-01-18 15:09:50,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:50,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:50,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:50,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 15:09:51,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:51,154 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:51,155 INFO L85 PathProgramCache]: Analyzing trace with hash 927869937, now seen corresponding path program 84 times [2022-01-18 15:09:51,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:51,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825411158] [2022-01-18 15:09:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:51,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:51,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:51,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825411158] [2022-01-18 15:09:51,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825411158] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:51,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109375505] [2022-01-18 15:09:51,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:09:51,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:51,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:51,284 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:51,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 15:09:51,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:09:51,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:51,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:51,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:51,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:51,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:51,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:51,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:51,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:51,651 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:09:51,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 15:09:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:51,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109375505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:51,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:51,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-01-18 15:09:51,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256744255] [2022-01-18 15:09:51,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:51,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:09:51,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:51,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:09:51,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:09:51,665 INFO L87 Difference]: Start difference. First operand 383 states and 1162 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:52,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:52,436 INFO L93 Difference]: Finished difference Result 812 states and 2402 transitions. [2022-01-18 15:09:52,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:09:52,436 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:52,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:52,437 INFO L225 Difference]: With dead ends: 812 [2022-01-18 15:09:52,437 INFO L226 Difference]: Without dead ends: 782 [2022-01-18 15:09:52,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:09:52,438 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 172 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:52,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 265 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:09:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-01-18 15:09:52,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 390. [2022-01-18 15:09:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0411311053984575) internal successors, (1183), 389 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:52,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1183 transitions. [2022-01-18 15:09:52,443 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1183 transitions. Word has length 20 [2022-01-18 15:09:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:52,444 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1183 transitions. [2022-01-18 15:09:52,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:52,444 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1183 transitions. [2022-01-18 15:09:52,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:52,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:52,444 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:52,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-01-18 15:09:52,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:52,645 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:52,645 INFO L85 PathProgramCache]: Analyzing trace with hash -70193263, now seen corresponding path program 85 times [2022-01-18 15:09:52,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:52,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800791588] [2022-01-18 15:09:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:52,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:52,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800791588] [2022-01-18 15:09:52,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800791588] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:52,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420961991] [2022-01-18 15:09:52,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:09:52,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:52,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:52,768 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:52,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 15:09:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:52,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:52,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:52,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:52,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:52,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:53,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:53,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:53,130 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:09:53,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 15:09:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:53,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420961991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:53,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:53,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-01-18 15:09:53,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64278594] [2022-01-18 15:09:53,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:53,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:09:53,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:53,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:09:53,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:09:53,144 INFO L87 Difference]: Start difference. First operand 390 states and 1183 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:53,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:53,796 INFO L93 Difference]: Finished difference Result 820 states and 2432 transitions. [2022-01-18 15:09:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:09:53,796 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:53,797 INFO L225 Difference]: With dead ends: 820 [2022-01-18 15:09:53,797 INFO L226 Difference]: Without dead ends: 805 [2022-01-18 15:09:53,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:09:53,798 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 239 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:53,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 205 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:09:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-18 15:09:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 387. [2022-01-18 15:09:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.0414507772020727) internal successors, (1174), 386 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1174 transitions. [2022-01-18 15:09:53,803 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1174 transitions. Word has length 20 [2022-01-18 15:09:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:53,804 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1174 transitions. [2022-01-18 15:09:53,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:53,804 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1174 transitions. [2022-01-18 15:09:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:53,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:53,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:53,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:54,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:54,005 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:54,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:54,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1398890683, now seen corresponding path program 86 times [2022-01-18 15:09:54,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:54,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928816185] [2022-01-18 15:09:54,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:54,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:54,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928816185] [2022-01-18 15:09:54,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928816185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266435729] [2022-01-18 15:09:54,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:09:54,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:54,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:54,125 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:54,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 15:09:54,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:09:54,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:54,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:54,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:54,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:54,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:54,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:54,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:54,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:54,510 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:09:54,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-01-18 15:09:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:54,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266435729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:54,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:54,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-01-18 15:09:54,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815071763] [2022-01-18 15:09:54,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:54,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:09:54,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:54,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:09:54,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:09:54,519 INFO L87 Difference]: Start difference. First operand 387 states and 1174 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:55,228 INFO L93 Difference]: Finished difference Result 876 states and 2606 transitions. [2022-01-18 15:09:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:09:55,229 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:55,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:55,230 INFO L225 Difference]: With dead ends: 876 [2022-01-18 15:09:55,230 INFO L226 Difference]: Without dead ends: 861 [2022-01-18 15:09:55,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:09:55,231 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 251 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:55,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 182 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:09:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-18 15:09:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 396. [2022-01-18 15:09:55,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.0405063291139243) internal successors, (1201), 395 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1201 transitions. [2022-01-18 15:09:55,238 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1201 transitions. Word has length 20 [2022-01-18 15:09:55,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:55,238 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1201 transitions. [2022-01-18 15:09:55,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:55,238 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1201 transitions. [2022-01-18 15:09:55,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:55,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:55,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:55,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:55,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:55,447 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:55,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:55,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1575543999, now seen corresponding path program 87 times [2022-01-18 15:09:55,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:55,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512059044] [2022-01-18 15:09:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:55,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:55,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:55,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512059044] [2022-01-18 15:09:55,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512059044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:55,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201356114] [2022-01-18 15:09:55,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:09:55,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:55,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:55,561 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:55,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 15:09:55,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:09:55,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:55,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:55,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:55,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:55,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:55,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:55,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:55,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:55,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:55,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:55,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:55,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:09:55,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:55,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:09:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:56,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201356114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:56,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:56,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:56,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881322003] [2022-01-18 15:09:56,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:56,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:56,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:56,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:56,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:56,000 INFO L87 Difference]: Start difference. First operand 396 states and 1201 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:56,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:56,395 INFO L93 Difference]: Finished difference Result 703 states and 2085 transitions. [2022-01-18 15:09:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:09:56,395 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:56,396 INFO L225 Difference]: With dead ends: 703 [2022-01-18 15:09:56,396 INFO L226 Difference]: Without dead ends: 673 [2022-01-18 15:09:56,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:09:56,397 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 163 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:56,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 185 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 384 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-01-18 15:09:56,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-18 15:09:56,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 396. [2022-01-18 15:09:56,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.0455696202531644) internal successors, (1203), 395 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:56,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1203 transitions. [2022-01-18 15:09:56,402 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1203 transitions. Word has length 20 [2022-01-18 15:09:56,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:56,402 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1203 transitions. [2022-01-18 15:09:56,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:56,403 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1203 transitions. [2022-01-18 15:09:56,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:56,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:56,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:56,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 15:09:56,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:56,605 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:56,605 INFO L85 PathProgramCache]: Analyzing trace with hash -552918911, now seen corresponding path program 88 times [2022-01-18 15:09:56,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:56,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516468600] [2022-01-18 15:09:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:56,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:56,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:56,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516468600] [2022-01-18 15:09:56,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516468600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:56,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779092108] [2022-01-18 15:09:56,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:09:56,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:56,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:56,822 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:56,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 15:09:56,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:09:56,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:56,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:56,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:56,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:56,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:57,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:57,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:57,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:57,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:57,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:57,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:57,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:57,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:57,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:09:57,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:57,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:09:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:57,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779092108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:57,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:57,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:57,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499752896] [2022-01-18 15:09:57,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:57,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:57,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:57,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:57,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:57,479 INFO L87 Difference]: Start difference. First operand 396 states and 1203 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:57,978 INFO L93 Difference]: Finished difference Result 703 states and 2086 transitions. [2022-01-18 15:09:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:09:57,978 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:57,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:57,979 INFO L225 Difference]: With dead ends: 703 [2022-01-18 15:09:57,979 INFO L226 Difference]: Without dead ends: 673 [2022-01-18 15:09:57,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:09:57,980 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 128 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:57,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 161 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 466 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-01-18 15:09:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-18 15:09:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 397. [2022-01-18 15:09:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0505050505050506) internal successors, (1208), 396 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1208 transitions. [2022-01-18 15:09:57,986 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1208 transitions. Word has length 20 [2022-01-18 15:09:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:57,986 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1208 transitions. [2022-01-18 15:09:57,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:57,986 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1208 transitions. [2022-01-18 15:09:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:57,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:57,987 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:58,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:58,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-01-18 15:09:58,188 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash 368783229, now seen corresponding path program 89 times [2022-01-18 15:09:58,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:58,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680420492] [2022-01-18 15:09:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:58,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:58,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:58,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680420492] [2022-01-18 15:09:58,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680420492] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:58,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485971374] [2022-01-18 15:09:58,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:09:58,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:58,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:58,338 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:58,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 15:09:58,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:09:58,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:58,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:58,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:58,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:58,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:58,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:58,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:58,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:58,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:58,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:09:58,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:58,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:09:58,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:58,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:09:58,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:09:58,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:09:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:58,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485971374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:09:58,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:09:58,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:09:58,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504876774] [2022-01-18 15:09:58,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:09:58,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:09:58,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:09:58,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:09:58,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:09:58,940 INFO L87 Difference]: Start difference. First operand 397 states and 1208 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:59,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:09:59,137 INFO L93 Difference]: Finished difference Result 608 states and 1806 transitions. [2022-01-18 15:09:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:09:59,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:09:59,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:09:59,138 INFO L225 Difference]: With dead ends: 608 [2022-01-18 15:09:59,138 INFO L226 Difference]: Without dead ends: 593 [2022-01-18 15:09:59,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:09:59,139 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:09:59,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 201 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 364 Invalid, 0 Unknown, 170 Unchecked, 0.1s Time] [2022-01-18 15:09:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-01-18 15:09:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 400. [2022-01-18 15:09:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.055137844611529) internal successors, (1219), 399 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1219 transitions. [2022-01-18 15:09:59,144 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1219 transitions. Word has length 20 [2022-01-18 15:09:59,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:09:59,144 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1219 transitions. [2022-01-18 15:09:59,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:09:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1219 transitions. [2022-01-18 15:09:59,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:09:59,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:09:59,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:09:59,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 15:09:59,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-18 15:09:59,346 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:09:59,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:09:59,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1694693441, now seen corresponding path program 90 times [2022-01-18 15:09:59,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:09:59,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200458093] [2022-01-18 15:09:59,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:09:59,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:09:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:09:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:59,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:09:59,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200458093] [2022-01-18 15:09:59,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200458093] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:09:59,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072965522] [2022-01-18 15:09:59,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:09:59,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:09:59,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:09:59,520 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:09:59,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 15:09:59,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:09:59,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:09:59,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:09:59,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:09:59,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:59,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:09:59,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:59,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:09:59,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:09:59,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:09:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:09:59,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:00,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:00,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:00,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:00,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:00,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:00,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:00,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072965522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:00,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:00,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:00,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731340926] [2022-01-18 15:10:00,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:00,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:00,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:00,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:00,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:00,117 INFO L87 Difference]: Start difference. First operand 400 states and 1219 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:00,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:00,507 INFO L93 Difference]: Finished difference Result 661 states and 1966 transitions. [2022-01-18 15:10:00,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:10:00,508 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:00,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:00,508 INFO L225 Difference]: With dead ends: 661 [2022-01-18 15:10:00,508 INFO L226 Difference]: Without dead ends: 631 [2022-01-18 15:10:00,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:10:00,509 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:00,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 163 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 418 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-01-18 15:10:00,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-18 15:10:00,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 394. [2022-01-18 15:10:00,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.040712468193384) internal successors, (1195), 393 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1195 transitions. [2022-01-18 15:10:00,515 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1195 transitions. Word has length 20 [2022-01-18 15:10:00,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:00,515 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1195 transitions. [2022-01-18 15:10:00,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1195 transitions. [2022-01-18 15:10:00,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:00,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:00,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:00,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 15:10:00,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-01-18 15:10:00,716 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:00,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:00,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1056166379, now seen corresponding path program 91 times [2022-01-18 15:10:00,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:00,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541569508] [2022-01-18 15:10:00,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:00,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:00,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:00,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541569508] [2022-01-18 15:10:00,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541569508] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:00,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749389607] [2022-01-18 15:10:00,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:10:00,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:00,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:00,821 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:00,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 15:10:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:00,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:00,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:00,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:00,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:01,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:01,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:01,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:01,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:01,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:01,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:01,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749389607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:01,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:01,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:10:01,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149546562] [2022-01-18 15:10:01,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:01,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:10:01,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:01,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:10:01,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:10:01,242 INFO L87 Difference]: Start difference. First operand 394 states and 1195 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:01,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:01,784 INFO L93 Difference]: Finished difference Result 720 states and 2115 transitions. [2022-01-18 15:10:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:10:01,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:01,785 INFO L225 Difference]: With dead ends: 720 [2022-01-18 15:10:01,785 INFO L226 Difference]: Without dead ends: 705 [2022-01-18 15:10:01,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:10:01,786 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 154 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:01,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 165 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:10:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-01-18 15:10:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 398. [2022-01-18 15:10:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 3.040302267002519) internal successors, (1207), 397 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1207 transitions. [2022-01-18 15:10:01,791 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1207 transitions. Word has length 20 [2022-01-18 15:10:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:01,791 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1207 transitions. [2022-01-18 15:10:01,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:01,792 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1207 transitions. [2022-01-18 15:10:01,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:01,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:01,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:01,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-18 15:10:01,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 15:10:01,995 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:01,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:01,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1197126641, now seen corresponding path program 92 times [2022-01-18 15:10:01,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:01,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188797226] [2022-01-18 15:10:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:01,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:02,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:02,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188797226] [2022-01-18 15:10:02,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188797226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:02,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326005629] [2022-01-18 15:10:02,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:10:02,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:02,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:02,112 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:02,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 15:10:02,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:10:02,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:02,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:02,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:02,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:02,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:02,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:02,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:02,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:02,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:02,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:02,601 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:02,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:02,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326005629] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:02,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:02,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:10:02,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137725280] [2022-01-18 15:10:02,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:02,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:10:02,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:02,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:10:02,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:10:02,636 INFO L87 Difference]: Start difference. First operand 398 states and 1207 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:03,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:03,101 INFO L93 Difference]: Finished difference Result 675 states and 1977 transitions. [2022-01-18 15:10:03,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:10:03,102 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:03,103 INFO L225 Difference]: With dead ends: 675 [2022-01-18 15:10:03,103 INFO L226 Difference]: Without dead ends: 645 [2022-01-18 15:10:03,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:03,103 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 88 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:03,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 171 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:10:03,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-18 15:10:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 406. [2022-01-18 15:10:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.049382716049383) internal successors, (1235), 405 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1235 transitions. [2022-01-18 15:10:03,109 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1235 transitions. Word has length 20 [2022-01-18 15:10:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:03,109 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1235 transitions. [2022-01-18 15:10:03,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1235 transitions. [2022-01-18 15:10:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:03,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:03,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:03,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:03,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:03,311 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:03,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1018546827, now seen corresponding path program 93 times [2022-01-18 15:10:03,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:03,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56404999] [2022-01-18 15:10:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:03,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:03,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:03,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56404999] [2022-01-18 15:10:03,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56404999] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:03,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912882932] [2022-01-18 15:10:03,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:10:03,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:03,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:03,662 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:03,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 15:10:03,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:10:03,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:03,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:03,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:03,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:03,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:03,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:03,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:03,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:04,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:04,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:04,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:04,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:04,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912882932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:04,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:04,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:10:04,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241895952] [2022-01-18 15:10:04,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:04,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:10:04,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:04,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:10:04,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:10:04,056 INFO L87 Difference]: Start difference. First operand 406 states and 1235 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:04,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:04,449 INFO L93 Difference]: Finished difference Result 693 states and 2020 transitions. [2022-01-18 15:10:04,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:10:04,450 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:04,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:04,451 INFO L225 Difference]: With dead ends: 693 [2022-01-18 15:10:04,451 INFO L226 Difference]: Without dead ends: 663 [2022-01-18 15:10:04,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:04,451 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 106 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:04,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 145 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:10:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-18 15:10:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 402. [2022-01-18 15:10:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.039900249376559) internal successors, (1219), 401 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:04,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1219 transitions. [2022-01-18 15:10:04,458 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1219 transitions. Word has length 20 [2022-01-18 15:10:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:04,458 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1219 transitions. [2022-01-18 15:10:04,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1219 transitions. [2022-01-18 15:10:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:04,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:04,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:04,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 15:10:04,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:04,659 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:04,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:04,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1127623933, now seen corresponding path program 94 times [2022-01-18 15:10:04,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:04,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684149622] [2022-01-18 15:10:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:04,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:04,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:04,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684149622] [2022-01-18 15:10:04,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684149622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:04,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390817544] [2022-01-18 15:10:04,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:10:04,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:04,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:04,772 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:04,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 15:10:04,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:10:04,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:04,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:04,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:04,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:04,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:04,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:05,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:05,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:05,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:05,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:05,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:05,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:05,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390817544] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:05,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:05,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:10:05,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809267041] [2022-01-18 15:10:05,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:05,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:10:05,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:05,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:10:05,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:10:05,130 INFO L87 Difference]: Start difference. First operand 402 states and 1219 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:05,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:05,372 INFO L93 Difference]: Finished difference Result 611 states and 1798 transitions. [2022-01-18 15:10:05,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:10:05,372 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:05,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:05,373 INFO L225 Difference]: With dead ends: 611 [2022-01-18 15:10:05,373 INFO L226 Difference]: Without dead ends: 581 [2022-01-18 15:10:05,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:10:05,373 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 85 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:05,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 133 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:10:05,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-18 15:10:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 394. [2022-01-18 15:10:05,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.040712468193384) internal successors, (1195), 393 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1195 transitions. [2022-01-18 15:10:05,378 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1195 transitions. Word has length 20 [2022-01-18 15:10:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:05,379 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1195 transitions. [2022-01-18 15:10:05,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1195 transitions. [2022-01-18 15:10:05,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:05,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:05,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:05,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-01-18 15:10:05,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-01-18 15:10:05,580 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:05,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:05,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2044157039, now seen corresponding path program 95 times [2022-01-18 15:10:05,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:05,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495511146] [2022-01-18 15:10:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:05,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:05,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:05,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495511146] [2022-01-18 15:10:05,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495511146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:05,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024689918] [2022-01-18 15:10:05,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:10:05,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:05,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:05,723 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:05,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 15:10:05,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:10:05,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:05,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:05,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:05,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:05,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:05,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:05,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:05,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:05,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:06,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:06,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:06,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:06,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:06,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:06,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:06,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:06,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024689918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:06,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:06,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:06,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000101425] [2022-01-18 15:10:06,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:06,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:06,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:06,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:06,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:06,295 INFO L87 Difference]: Start difference. First operand 394 states and 1195 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:06,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:06,522 INFO L93 Difference]: Finished difference Result 583 states and 1743 transitions. [2022-01-18 15:10:06,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:10:06,522 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:06,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:06,523 INFO L225 Difference]: With dead ends: 583 [2022-01-18 15:10:06,523 INFO L226 Difference]: Without dead ends: 568 [2022-01-18 15:10:06,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:06,523 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:06,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 158 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 448 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-01-18 15:10:06,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-18 15:10:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 400. [2022-01-18 15:10:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0426065162907268) internal successors, (1214), 399 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1214 transitions. [2022-01-18 15:10:06,534 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1214 transitions. Word has length 20 [2022-01-18 15:10:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:06,534 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1214 transitions. [2022-01-18 15:10:06,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1214 transitions. [2022-01-18 15:10:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:06,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:06,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:06,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:06,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-01-18 15:10:06,739 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:06,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:06,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1473926001, now seen corresponding path program 96 times [2022-01-18 15:10:06,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:06,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793794038] [2022-01-18 15:10:06,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:06,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:06,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:06,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793794038] [2022-01-18 15:10:06,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793794038] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:06,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143561873] [2022-01-18 15:10:06,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:10:06,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:06,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:06,878 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:06,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 15:10:06,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:10:06,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:06,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:06,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:07,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:07,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:07,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:07,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:07,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:07,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:07,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:07,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:07,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:07,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:07,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:07,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:07,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:07,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143561873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:07,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:07,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:07,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902620525] [2022-01-18 15:10:07,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:07,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:07,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:07,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:07,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:07,391 INFO L87 Difference]: Start difference. First operand 400 states and 1214 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:07,636 INFO L93 Difference]: Finished difference Result 644 states and 1904 transitions. [2022-01-18 15:10:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:10:07,636 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:07,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:07,637 INFO L225 Difference]: With dead ends: 644 [2022-01-18 15:10:07,637 INFO L226 Difference]: Without dead ends: 629 [2022-01-18 15:10:07,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:07,638 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:07,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 170 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 397 Invalid, 0 Unknown, 139 Unchecked, 0.2s Time] [2022-01-18 15:10:07,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-18 15:10:07,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 396. [2022-01-18 15:10:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.043037974683544) internal successors, (1202), 395 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1202 transitions. [2022-01-18 15:10:07,645 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1202 transitions. Word has length 20 [2022-01-18 15:10:07,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:07,645 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1202 transitions. [2022-01-18 15:10:07,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:07,645 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1202 transitions. [2022-01-18 15:10:07,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:07,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:07,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:07,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:07,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-01-18 15:10:07,867 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:07,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:07,867 INFO L85 PathProgramCache]: Analyzing trace with hash 253320373, now seen corresponding path program 97 times [2022-01-18 15:10:07,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:07,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170902997] [2022-01-18 15:10:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:07,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:08,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:08,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170902997] [2022-01-18 15:10:08,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170902997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:08,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925877252] [2022-01-18 15:10:08,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:10:08,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:08,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:08,040 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:08,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 15:10:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:08,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:08,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:08,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:08,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:08,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:08,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:08,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:08,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:08,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:08,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:08,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:08,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:08,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:08,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:08,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925877252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:08,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:08,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:08,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304208465] [2022-01-18 15:10:08,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:08,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:08,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:08,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:08,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:08,708 INFO L87 Difference]: Start difference. First operand 396 states and 1202 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:09,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:09,012 INFO L93 Difference]: Finished difference Result 661 states and 1947 transitions. [2022-01-18 15:10:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:10:09,013 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:09,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:09,014 INFO L225 Difference]: With dead ends: 661 [2022-01-18 15:10:09,014 INFO L226 Difference]: Without dead ends: 631 [2022-01-18 15:10:09,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:09,014 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:09,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 187 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 496 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-01-18 15:10:09,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-18 15:10:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 397. [2022-01-18 15:10:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.047979797979798) internal successors, (1207), 396 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1207 transitions. [2022-01-18 15:10:09,022 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1207 transitions. Word has length 20 [2022-01-18 15:10:09,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:09,022 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1207 transitions. [2022-01-18 15:10:09,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:09,022 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1207 transitions. [2022-01-18 15:10:09,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:09,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:09,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:09,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:09,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:09,242 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:09,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:09,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1175022513, now seen corresponding path program 98 times [2022-01-18 15:10:09,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:09,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313806064] [2022-01-18 15:10:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:09,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:09,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:09,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313806064] [2022-01-18 15:10:09,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313806064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:09,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705501072] [2022-01-18 15:10:09,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:10:09,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:09,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:09,407 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:09,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 15:10:09,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:10:09,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:09,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:09,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:09,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:09,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:09,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:09,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:09,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:09,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:09,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:09,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:09,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:09,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:09,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:09,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:09,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:10,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705501072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:10,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:10,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:10,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454515190] [2022-01-18 15:10:10,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:10,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:10,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:10,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:10,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:10,027 INFO L87 Difference]: Start difference. First operand 397 states and 1207 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:10,284 INFO L93 Difference]: Finished difference Result 646 states and 1913 transitions. [2022-01-18 15:10:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:10:10,284 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:10,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:10,285 INFO L225 Difference]: With dead ends: 646 [2022-01-18 15:10:10,285 INFO L226 Difference]: Without dead ends: 631 [2022-01-18 15:10:10,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:10,285 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:10,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 155 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 401 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-01-18 15:10:10,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-18 15:10:10,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 399. [2022-01-18 15:10:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0527638190954773) internal successors, (1215), 398 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1215 transitions. [2022-01-18 15:10:10,290 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1215 transitions. Word has length 20 [2022-01-18 15:10:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:10,290 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1215 transitions. [2022-01-18 15:10:10,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:10,291 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1215 transitions. [2022-01-18 15:10:10,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:10,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:10,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:10,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 15:10:10,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:10,492 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:10,492 INFO L85 PathProgramCache]: Analyzing trace with hash 421638897, now seen corresponding path program 99 times [2022-01-18 15:10:10,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:10,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803573830] [2022-01-18 15:10:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:10,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:10,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:10,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803573830] [2022-01-18 15:10:10,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803573830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:10,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710753177] [2022-01-18 15:10:10,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:10:10,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:10,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:10,702 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:10,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 15:10:10,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:10:10,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:10,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:10:10,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:10,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:10,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:11,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:11,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-01-18 15:10:11,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:11,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 15:10:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:11,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:11,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:11,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:11,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:11,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:11,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:11,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:11,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710753177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:11,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:11,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:11,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980241003] [2022-01-18 15:10:11,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:11,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:11,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:11,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:11,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:11,847 INFO L87 Difference]: Start difference. First operand 399 states and 1215 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:12,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:12,215 INFO L93 Difference]: Finished difference Result 640 states and 1896 transitions. [2022-01-18 15:10:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:10:12,215 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:12,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:12,216 INFO L225 Difference]: With dead ends: 640 [2022-01-18 15:10:12,216 INFO L226 Difference]: Without dead ends: 633 [2022-01-18 15:10:12,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:12,216 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:12,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 244 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 638 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-01-18 15:10:12,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-18 15:10:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 400. [2022-01-18 15:10:12,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0526315789473686) internal successors, (1218), 399 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1218 transitions. [2022-01-18 15:10:12,221 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1218 transitions. Word has length 20 [2022-01-18 15:10:12,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:12,222 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1218 transitions. [2022-01-18 15:10:12,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:12,222 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1218 transitions. [2022-01-18 15:10:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:12,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:12,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:12,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:12,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:12,423 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:12,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1794034571, now seen corresponding path program 100 times [2022-01-18 15:10:12,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:12,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235937122] [2022-01-18 15:10:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:12,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:12,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:12,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235937122] [2022-01-18 15:10:12,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235937122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:12,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121787891] [2022-01-18 15:10:12,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:10:12,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:12,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:12,577 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:12,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 15:10:12,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:10:12,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:12,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:12,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:12,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:12,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:12,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:12,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:12,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:12,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:12,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:13,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:13,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:13,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:13,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:13,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:13,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:13,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121787891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:13,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:13,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:13,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887369441] [2022-01-18 15:10:13,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:13,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:13,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:13,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:13,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:13,154 INFO L87 Difference]: Start difference. First operand 400 states and 1218 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:13,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:13,463 INFO L93 Difference]: Finished difference Result 653 states and 1927 transitions. [2022-01-18 15:10:13,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:10:13,463 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:13,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:13,464 INFO L225 Difference]: With dead ends: 653 [2022-01-18 15:10:13,464 INFO L226 Difference]: Without dead ends: 623 [2022-01-18 15:10:13,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:13,465 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:13,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 189 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 512 Invalid, 0 Unknown, 160 Unchecked, 0.2s Time] [2022-01-18 15:10:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-18 15:10:13,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 396. [2022-01-18 15:10:13,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.043037974683544) internal successors, (1202), 395 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1202 transitions. [2022-01-18 15:10:13,470 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1202 transitions. Word has length 20 [2022-01-18 15:10:13,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:13,470 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1202 transitions. [2022-01-18 15:10:13,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1202 transitions. [2022-01-18 15:10:13,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:13,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:13,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:13,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 15:10:13,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:13,671 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:13,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1816935659, now seen corresponding path program 101 times [2022-01-18 15:10:13,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:13,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571074476] [2022-01-18 15:10:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:13,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:13,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:13,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571074476] [2022-01-18 15:10:13,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571074476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:13,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292441729] [2022-01-18 15:10:13,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:10:13,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:13,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:13,848 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:13,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 15:10:13,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:10:13,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:13,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:13,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:13,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:13,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:14,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:14,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:14,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:14,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:14,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:14,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:14,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:14,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:14,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:14,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:14,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:14,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292441729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:14,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:14,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:14,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474719019] [2022-01-18 15:10:14,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:14,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:14,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:14,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:14,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:14,459 INFO L87 Difference]: Start difference. First operand 396 states and 1202 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:14,671 INFO L93 Difference]: Finished difference Result 581 states and 1738 transitions. [2022-01-18 15:10:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:10:14,671 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:14,672 INFO L225 Difference]: With dead ends: 581 [2022-01-18 15:10:14,672 INFO L226 Difference]: Without dead ends: 566 [2022-01-18 15:10:14,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:14,672 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:14,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 119 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 353 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-01-18 15:10:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-18 15:10:14,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 399. [2022-01-18 15:10:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.050251256281407) internal successors, (1214), 398 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1214 transitions. [2022-01-18 15:10:14,677 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1214 transitions. Word has length 20 [2022-01-18 15:10:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:14,677 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1214 transitions. [2022-01-18 15:10:14,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:14,677 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1214 transitions. [2022-01-18 15:10:14,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:14,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:14,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:14,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-01-18 15:10:14,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 15:10:14,878 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:14,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:14,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1701147381, now seen corresponding path program 102 times [2022-01-18 15:10:14,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:14,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549321765] [2022-01-18 15:10:14,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:14,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:15,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:15,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549321765] [2022-01-18 15:10:15,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549321765] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:15,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91057783] [2022-01-18 15:10:15,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:10:15,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:15,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:15,018 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:15,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 15:10:15,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:10:15,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:15,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:15,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:15,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:15,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:15,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:15,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:15,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:15,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:15,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:15,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:15,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:15,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:15,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:15,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:15,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:15,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91057783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:15,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:15,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:15,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221236838] [2022-01-18 15:10:15,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:15,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:15,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:15,549 INFO L87 Difference]: Start difference. First operand 399 states and 1214 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:15,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:15,824 INFO L93 Difference]: Finished difference Result 642 states and 1899 transitions. [2022-01-18 15:10:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:10:15,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:15,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:15,825 INFO L225 Difference]: With dead ends: 642 [2022-01-18 15:10:15,825 INFO L226 Difference]: Without dead ends: 627 [2022-01-18 15:10:15,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:15,825 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:15,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 206 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 525 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-01-18 15:10:15,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-01-18 15:10:15,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 397. [2022-01-18 15:10:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.047979797979798) internal successors, (1207), 396 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:15,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1207 transitions. [2022-01-18 15:10:15,831 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1207 transitions. Word has length 20 [2022-01-18 15:10:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:15,832 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1207 transitions. [2022-01-18 15:10:15,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:15,832 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1207 transitions. [2022-01-18 15:10:15,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:15,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:15,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:15,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:16,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 15:10:16,054 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1220829743, now seen corresponding path program 103 times [2022-01-18 15:10:16,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:16,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762898612] [2022-01-18 15:10:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:16,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:16,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:16,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762898612] [2022-01-18 15:10:16,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762898612] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:16,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395953649] [2022-01-18 15:10:16,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:10:16,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:16,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:16,170 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:16,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 15:10:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:16,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:16,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:16,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:16,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:16,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:16,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:16,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:16,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:16,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:16,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:16,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:16,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:16,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:16,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:16,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:16,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395953649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:16,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:16,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:10:16,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042354357] [2022-01-18 15:10:16,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:16,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:10:16,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:16,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:10:16,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:10:16,599 INFO L87 Difference]: Start difference. First operand 397 states and 1207 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:16,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:16,807 INFO L93 Difference]: Finished difference Result 579 states and 1731 transitions. [2022-01-18 15:10:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:10:16,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:16,808 INFO L225 Difference]: With dead ends: 579 [2022-01-18 15:10:16,808 INFO L226 Difference]: Without dead ends: 564 [2022-01-18 15:10:16,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:10:16,808 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:16,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 119 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 386 Invalid, 0 Unknown, 131 Unchecked, 0.1s Time] [2022-01-18 15:10:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-18 15:10:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 397. [2022-01-18 15:10:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.047979797979798) internal successors, (1207), 396 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1207 transitions. [2022-01-18 15:10:16,813 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1207 transitions. Word has length 20 [2022-01-18 15:10:16,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:16,813 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1207 transitions. [2022-01-18 15:10:16,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:16,813 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1207 transitions. [2022-01-18 15:10:16,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:16,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:16,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:16,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-18 15:10:17,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 15:10:17,014 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:17,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:17,015 INFO L85 PathProgramCache]: Analyzing trace with hash -695329103, now seen corresponding path program 104 times [2022-01-18 15:10:17,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:17,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375652012] [2022-01-18 15:10:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:17,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:17,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:17,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375652012] [2022-01-18 15:10:17,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375652012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:17,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631987526] [2022-01-18 15:10:17,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:10:17,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:17,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:17,184 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:17,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 15:10:17,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:10:17,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:17,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:17,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:17,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:17,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:17,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:17,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:17,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:17,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:17,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:17,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:17,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:17,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:17,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:17,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:17,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:17,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631987526] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:17,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:17,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:17,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356228280] [2022-01-18 15:10:17,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:17,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:17,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:17,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:17,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:17,815 INFO L87 Difference]: Start difference. First operand 397 states and 1207 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:18,111 INFO L93 Difference]: Finished difference Result 642 states and 1892 transitions. [2022-01-18 15:10:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:10:18,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:18,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:18,112 INFO L225 Difference]: With dead ends: 642 [2022-01-18 15:10:18,112 INFO L226 Difference]: Without dead ends: 627 [2022-01-18 15:10:18,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:18,113 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:18,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 221 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 587 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-01-18 15:10:18,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-01-18 15:10:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 397. [2022-01-18 15:10:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.047979797979798) internal successors, (1207), 396 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1207 transitions. [2022-01-18 15:10:18,118 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1207 transitions. Word has length 20 [2022-01-18 15:10:18,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:18,118 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1207 transitions. [2022-01-18 15:10:18,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:18,118 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1207 transitions. [2022-01-18 15:10:18,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:18,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:18,119 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:18,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 15:10:18,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:18,319 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:18,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:18,319 INFO L85 PathProgramCache]: Analyzing trace with hash 293731445, now seen corresponding path program 105 times [2022-01-18 15:10:18,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:18,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939886887] [2022-01-18 15:10:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:18,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:18,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:18,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939886887] [2022-01-18 15:10:18,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939886887] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:18,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964110484] [2022-01-18 15:10:18,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:10:18,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:18,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:18,448 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:18,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 15:10:18,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:10:18,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:18,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:10:18,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:18,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:18,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:18,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:18,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:18,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:18,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:18,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:19,033 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:19,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:19,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:19,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:19,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:19,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:19,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964110484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:19,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:19,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:19,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998441733] [2022-01-18 15:10:19,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:19,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:19,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:19,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:19,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:19,150 INFO L87 Difference]: Start difference. First operand 397 states and 1207 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:19,437 INFO L93 Difference]: Finished difference Result 600 states and 1778 transitions. [2022-01-18 15:10:19,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:10:19,437 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:19,438 INFO L225 Difference]: With dead ends: 600 [2022-01-18 15:10:19,438 INFO L226 Difference]: Without dead ends: 570 [2022-01-18 15:10:19,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:19,439 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 67 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:19,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 152 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 412 Invalid, 0 Unknown, 123 Unchecked, 0.2s Time] [2022-01-18 15:10:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-18 15:10:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 403. [2022-01-18 15:10:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.0696517412935322) internal successors, (1234), 402 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1234 transitions. [2022-01-18 15:10:19,444 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1234 transitions. Word has length 20 [2022-01-18 15:10:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:19,444 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1234 transitions. [2022-01-18 15:10:19,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:19,444 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1234 transitions. [2022-01-18 15:10:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:19,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:19,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:19,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-01-18 15:10:19,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-01-18 15:10:19,645 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:19,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:19,645 INFO L85 PathProgramCache]: Analyzing trace with hash -2132246361, now seen corresponding path program 106 times [2022-01-18 15:10:19,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:19,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129197130] [2022-01-18 15:10:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:19,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:19,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:19,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129197130] [2022-01-18 15:10:19,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129197130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:19,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445752054] [2022-01-18 15:10:19,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:10:19,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:19,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:19,752 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:19,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 15:10:19,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:10:19,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:19,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:19,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:19,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:19,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:19,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:19,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:19,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:19,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:20,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:20,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:20,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:20,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:20,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:20,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:20,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445752054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:20,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:20,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:10:20,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171246614] [2022-01-18 15:10:20,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:20,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:10:20,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:10:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:10:20,242 INFO L87 Difference]: Start difference. First operand 403 states and 1234 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:20,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:20,376 INFO L93 Difference]: Finished difference Result 565 states and 1684 transitions. [2022-01-18 15:10:20,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:10:20,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:20,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:20,377 INFO L225 Difference]: With dead ends: 565 [2022-01-18 15:10:20,377 INFO L226 Difference]: Without dead ends: 535 [2022-01-18 15:10:20,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:10:20,377 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:20,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 148 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 312 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-01-18 15:10:20,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-18 15:10:20,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 411. [2022-01-18 15:10:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.078048780487805) internal successors, (1262), 410 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:20,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1262 transitions. [2022-01-18 15:10:20,382 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1262 transitions. Word has length 20 [2022-01-18 15:10:20,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:20,382 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1262 transitions. [2022-01-18 15:10:20,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1262 transitions. [2022-01-18 15:10:20,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:20,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:20,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:20,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 15:10:20,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-01-18 15:10:20,583 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:20,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1210544221, now seen corresponding path program 107 times [2022-01-18 15:10:20,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:20,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268262455] [2022-01-18 15:10:20,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:20,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:20,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:20,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268262455] [2022-01-18 15:10:20,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268262455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:20,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644872263] [2022-01-18 15:10:20,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:10:20,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:20,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:20,741 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:20,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 15:10:20,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:10:20,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:20,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:20,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:20,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:20,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:21,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:21,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:21,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:21,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:21,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:21,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:21,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:21,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:21,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:21,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:21,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:21,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644872263] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:21,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:21,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:21,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642042915] [2022-01-18 15:10:21,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:21,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:21,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:21,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:21,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:21,342 INFO L87 Difference]: Start difference. First operand 411 states and 1262 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:21,587 INFO L93 Difference]: Finished difference Result 618 states and 1844 transitions. [2022-01-18 15:10:21,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:10:21,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:21,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:21,588 INFO L225 Difference]: With dead ends: 618 [2022-01-18 15:10:21,588 INFO L226 Difference]: Without dead ends: 603 [2022-01-18 15:10:21,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:21,588 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:21,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 174 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 513 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-01-18 15:10:21,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-18 15:10:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 411. [2022-01-18 15:10:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.078048780487805) internal successors, (1262), 410 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1262 transitions. [2022-01-18 15:10:21,593 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1262 transitions. Word has length 20 [2022-01-18 15:10:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:21,594 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1262 transitions. [2022-01-18 15:10:21,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1262 transitions. [2022-01-18 15:10:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:21,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:21,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:21,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-01-18 15:10:21,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:21,795 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:21,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:21,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1963927837, now seen corresponding path program 108 times [2022-01-18 15:10:21,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:21,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832856926] [2022-01-18 15:10:21,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:21,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:21,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:21,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832856926] [2022-01-18 15:10:21,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832856926] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:21,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051590117] [2022-01-18 15:10:21,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:10:21,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:21,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:21,932 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:21,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 15:10:21,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:10:21,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:21,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:21,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:22,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:22,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:22,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:22,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:22,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:22,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:22,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:22,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:22,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:22,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:22,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:22,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:22,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:22,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051590117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:22,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:22,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:22,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120056090] [2022-01-18 15:10:22,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:22,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:22,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:22,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:22,550 INFO L87 Difference]: Start difference. First operand 411 states and 1262 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:22,780 INFO L93 Difference]: Finished difference Result 612 states and 1827 transitions. [2022-01-18 15:10:22,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:10:22,781 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:22,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:22,782 INFO L225 Difference]: With dead ends: 612 [2022-01-18 15:10:22,782 INFO L226 Difference]: Without dead ends: 605 [2022-01-18 15:10:22,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:22,782 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:22,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 200 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 470 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-01-18 15:10:22,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-18 15:10:22,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 413. [2022-01-18 15:10:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.0825242718446604) internal successors, (1270), 412 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1270 transitions. [2022-01-18 15:10:22,787 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1270 transitions. Word has length 20 [2022-01-18 15:10:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:22,787 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1270 transitions. [2022-01-18 15:10:22,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:22,787 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1270 transitions. [2022-01-18 15:10:22,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:22,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:22,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:22,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-01-18 15:10:22,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:22,988 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:22,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:22,989 INFO L85 PathProgramCache]: Analyzing trace with hash 115365991, now seen corresponding path program 109 times [2022-01-18 15:10:22,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:22,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082671644] [2022-01-18 15:10:22,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:22,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:23,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:23,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082671644] [2022-01-18 15:10:23,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082671644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:23,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696811957] [2022-01-18 15:10:23,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:10:23,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:23,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:23,164 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:23,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 15:10:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:23,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:23,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:23,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:23,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:23,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:23,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:23,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:23,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:23,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:23,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:23,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:23,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:23,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:23,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:23,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:23,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696811957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:23,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:23,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:23,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111022044] [2022-01-18 15:10:23,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:23,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:23,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:23,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:23,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:23,748 INFO L87 Difference]: Start difference. First operand 413 states and 1270 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:24,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:24,023 INFO L93 Difference]: Finished difference Result 625 states and 1858 transitions. [2022-01-18 15:10:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:10:24,023 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:24,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:24,024 INFO L225 Difference]: With dead ends: 625 [2022-01-18 15:10:24,024 INFO L226 Difference]: Without dead ends: 595 [2022-01-18 15:10:24,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:24,024 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:24,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 173 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 543 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-01-18 15:10:24,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-18 15:10:24,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 410. [2022-01-18 15:10:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.0733496332518335) internal successors, (1257), 409 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:24,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1257 transitions. [2022-01-18 15:10:24,029 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1257 transitions. Word has length 20 [2022-01-18 15:10:24,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:24,029 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1257 transitions. [2022-01-18 15:10:24,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:24,029 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1257 transitions. [2022-01-18 15:10:24,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:24,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:24,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:24,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:24,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2022-01-18 15:10:24,230 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:24,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:24,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1415957971, now seen corresponding path program 110 times [2022-01-18 15:10:24,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:24,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880655275] [2022-01-18 15:10:24,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:24,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:24,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:24,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880655275] [2022-01-18 15:10:24,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880655275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:24,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708421672] [2022-01-18 15:10:24,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:10:24,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:24,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:24,344 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:24,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 15:10:24,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:10:24,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:24,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:24,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:24,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:24,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:24,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:24,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:24,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:24,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:24,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:24,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:24,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:24,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:24,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:24,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:24,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708421672] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:24,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:24,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:10:24,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714180097] [2022-01-18 15:10:24,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:24,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:10:24,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:24,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:10:24,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:10:24,808 INFO L87 Difference]: Start difference. First operand 410 states and 1257 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:25,058 INFO L93 Difference]: Finished difference Result 570 states and 1702 transitions. [2022-01-18 15:10:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:10:25,058 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:25,059 INFO L225 Difference]: With dead ends: 570 [2022-01-18 15:10:25,059 INFO L226 Difference]: Without dead ends: 563 [2022-01-18 15:10:25,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:25,059 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:25,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 180 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 579 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 15:10:25,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-18 15:10:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 410. [2022-01-18 15:10:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.0733496332518335) internal successors, (1257), 409 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1257 transitions. [2022-01-18 15:10:25,064 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1257 transitions. Word has length 20 [2022-01-18 15:10:25,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:25,064 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1257 transitions. [2022-01-18 15:10:25,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:25,065 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1257 transitions. [2022-01-18 15:10:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:25,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:25,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:25,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-01-18 15:10:25,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:25,266 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:25,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:25,266 INFO L85 PathProgramCache]: Analyzing trace with hash -799715497, now seen corresponding path program 111 times [2022-01-18 15:10:25,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:25,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132904640] [2022-01-18 15:10:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:25,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:25,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:25,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132904640] [2022-01-18 15:10:25,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132904640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:25,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585812347] [2022-01-18 15:10:25,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:10:25,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:25,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:25,383 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:25,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 15:10:25,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:10:25,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:25,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:25,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:25,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:25,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:25,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:25,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:25,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:25,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:25,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:25,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:25,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:25,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:25,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:25,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:25,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585812347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:25,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:25,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:10:25,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727720017] [2022-01-18 15:10:25,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:25,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:10:25,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:25,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:10:25,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:10:25,845 INFO L87 Difference]: Start difference. First operand 410 states and 1257 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:26,072 INFO L93 Difference]: Finished difference Result 565 states and 1693 transitions. [2022-01-18 15:10:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:10:26,073 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:26,073 INFO L225 Difference]: With dead ends: 565 [2022-01-18 15:10:26,073 INFO L226 Difference]: Without dead ends: 550 [2022-01-18 15:10:26,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:10:26,074 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:26,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 133 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 463 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-18 15:10:26,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-01-18 15:10:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 407. [2022-01-18 15:10:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0689655172413794) internal successors, (1246), 406 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:26,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1246 transitions. [2022-01-18 15:10:26,078 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1246 transitions. Word has length 20 [2022-01-18 15:10:26,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:26,079 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1246 transitions. [2022-01-18 15:10:26,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:26,079 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1246 transitions. [2022-01-18 15:10:26,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:26,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:26,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:26,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-01-18 15:10:26,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 15:10:26,280 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:26,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:26,280 INFO L85 PathProgramCache]: Analyzing trace with hash 830517661, now seen corresponding path program 112 times [2022-01-18 15:10:26,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:26,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88979338] [2022-01-18 15:10:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:26,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:26,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:26,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88979338] [2022-01-18 15:10:26,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88979338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:26,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435455906] [2022-01-18 15:10:26,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:10:26,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:26,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:26,408 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:26,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 15:10:26,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:10:26,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:26,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:26,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:26,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:26,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:26,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:26,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:26,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:26,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:26,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:26,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:26,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:26,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:26,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:26,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:26,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:26,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435455906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:26,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:26,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:10:26,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773934423] [2022-01-18 15:10:26,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:26,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:10:26,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:26,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:10:26,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:10:26,887 INFO L87 Difference]: Start difference. First operand 407 states and 1246 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:27,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:27,070 INFO L93 Difference]: Finished difference Result 548 states and 1640 transitions. [2022-01-18 15:10:27,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:10:27,070 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:27,071 INFO L225 Difference]: With dead ends: 548 [2022-01-18 15:10:27,071 INFO L226 Difference]: Without dead ends: 518 [2022-01-18 15:10:27,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:10:27,071 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:27,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 151 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 439 Invalid, 0 Unknown, 168 Unchecked, 0.2s Time] [2022-01-18 15:10:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-18 15:10:27,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 411. [2022-01-18 15:10:27,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.078048780487805) internal successors, (1262), 410 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:27,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1262 transitions. [2022-01-18 15:10:27,076 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1262 transitions. Word has length 20 [2022-01-18 15:10:27,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:27,076 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1262 transitions. [2022-01-18 15:10:27,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:27,076 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1262 transitions. [2022-01-18 15:10:27,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:27,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:27,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:27,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:27,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-18 15:10:27,277 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:27,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:27,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1417433263, now seen corresponding path program 113 times [2022-01-18 15:10:27,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:27,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758263996] [2022-01-18 15:10:27,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:27,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:27,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:27,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758263996] [2022-01-18 15:10:27,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758263996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:27,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602043456] [2022-01-18 15:10:27,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:10:27,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:27,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:27,406 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:27,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 15:10:27,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:10:27,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:27,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:27,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:27,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:27,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:27,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:27,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:27,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:27,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:27,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:27,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:27,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:27,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:27,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:27,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:27,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:27,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602043456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:27,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:27,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:27,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108713594] [2022-01-18 15:10:27,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:27,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:27,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:27,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:27,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:27,900 INFO L87 Difference]: Start difference. First operand 411 states and 1262 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:28,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:28,098 INFO L93 Difference]: Finished difference Result 613 states and 1798 transitions. [2022-01-18 15:10:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:10:28,099 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:28,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:28,100 INFO L225 Difference]: With dead ends: 613 [2022-01-18 15:10:28,100 INFO L226 Difference]: Without dead ends: 583 [2022-01-18 15:10:28,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:10:28,100 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:28,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 165 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 426 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-01-18 15:10:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-18 15:10:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 416. [2022-01-18 15:10:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.07710843373494) internal successors, (1277), 415 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1277 transitions. [2022-01-18 15:10:28,105 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1277 transitions. Word has length 20 [2022-01-18 15:10:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:28,105 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1277 transitions. [2022-01-18 15:10:28,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1277 transitions. [2022-01-18 15:10:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:28,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:28,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:28,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-01-18 15:10:28,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:28,306 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:28,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:28,306 INFO L85 PathProgramCache]: Analyzing trace with hash -852148969, now seen corresponding path program 114 times [2022-01-18 15:10:28,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:28,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622652371] [2022-01-18 15:10:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:28,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:28,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:28,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622652371] [2022-01-18 15:10:28,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622652371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:28,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404661957] [2022-01-18 15:10:28,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:10:28,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:28,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:28,445 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:28,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 15:10:28,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:10:28,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:28,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:28,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:28,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:28,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:28,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:28,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:28,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:28,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:28,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:28,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:28,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:28,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:28,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:28,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:28,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:28,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404661957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:28,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:28,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:28,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135904839] [2022-01-18 15:10:28,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:28,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:28,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:28,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:28,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:28,930 INFO L87 Difference]: Start difference. First operand 416 states and 1277 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:29,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:29,146 INFO L93 Difference]: Finished difference Result 599 states and 1756 transitions. [2022-01-18 15:10:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:10:29,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:29,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:29,148 INFO L225 Difference]: With dead ends: 599 [2022-01-18 15:10:29,148 INFO L226 Difference]: Without dead ends: 585 [2022-01-18 15:10:29,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:29,148 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:29,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 164 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 449 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-01-18 15:10:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-01-18 15:10:29,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 418. [2022-01-18 15:10:29,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.0719424460431655) internal successors, (1281), 417 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1281 transitions. [2022-01-18 15:10:29,153 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1281 transitions. Word has length 20 [2022-01-18 15:10:29,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:29,153 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1281 transitions. [2022-01-18 15:10:29,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:29,153 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1281 transitions. [2022-01-18 15:10:29,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:29,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:29,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:29,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-01-18 15:10:29,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 15:10:29,354 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:29,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:29,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1527530897, now seen corresponding path program 115 times [2022-01-18 15:10:29,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:29,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070111980] [2022-01-18 15:10:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:29,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:29,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:29,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070111980] [2022-01-18 15:10:29,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070111980] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:29,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130898126] [2022-01-18 15:10:29,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:10:29,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:29,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:29,500 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:29,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 15:10:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:29,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:29,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:29,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:29,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:29,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:29,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:29,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:29,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:29,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:29,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:29,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:30,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:30,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:30,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:30,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:30,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130898126] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:30,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:30,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:30,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481241135] [2022-01-18 15:10:30,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:30,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:30,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:30,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:30,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:30,067 INFO L87 Difference]: Start difference. First operand 418 states and 1281 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:30,252 INFO L93 Difference]: Finished difference Result 578 states and 1716 transitions. [2022-01-18 15:10:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:10:30,253 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:30,253 INFO L225 Difference]: With dead ends: 578 [2022-01-18 15:10:30,253 INFO L226 Difference]: Without dead ends: 575 [2022-01-18 15:10:30,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:10:30,254 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:30,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 178 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 404 Invalid, 0 Unknown, 212 Unchecked, 0.1s Time] [2022-01-18 15:10:30,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-01-18 15:10:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 407. [2022-01-18 15:10:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0788177339901477) internal successors, (1250), 406 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1250 transitions. [2022-01-18 15:10:30,259 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1250 transitions. Word has length 20 [2022-01-18 15:10:30,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:30,259 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1250 transitions. [2022-01-18 15:10:30,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:30,259 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1250 transitions. [2022-01-18 15:10:30,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:30,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:30,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:30,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:30,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-01-18 15:10:30,462 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:30,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:30,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1327832027, now seen corresponding path program 116 times [2022-01-18 15:10:30,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:30,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842521527] [2022-01-18 15:10:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:30,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:30,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:30,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842521527] [2022-01-18 15:10:30,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842521527] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:30,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158219396] [2022-01-18 15:10:30,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:10:30,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:30,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:30,581 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:30,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 15:10:30,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:10:30,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:30,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:30,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:30,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:30,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:30,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:30,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:30,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:30,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:30,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:30,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:30,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:31,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:31,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:31,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:31,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:31,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158219396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:31,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:31,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:31,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118195895] [2022-01-18 15:10:31,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:31,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:31,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:31,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:31,061 INFO L87 Difference]: Start difference. First operand 407 states and 1250 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:31,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:31,279 INFO L93 Difference]: Finished difference Result 573 states and 1708 transitions. [2022-01-18 15:10:31,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:10:31,280 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:31,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:31,281 INFO L225 Difference]: With dead ends: 573 [2022-01-18 15:10:31,281 INFO L226 Difference]: Without dead ends: 558 [2022-01-18 15:10:31,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:10:31,281 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:31,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 160 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 506 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-01-18 15:10:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-01-18 15:10:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 409. [2022-01-18 15:10:31,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.0833333333333335) internal successors, (1258), 408 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1258 transitions. [2022-01-18 15:10:31,287 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1258 transitions. Word has length 20 [2022-01-18 15:10:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:31,288 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1258 transitions. [2022-01-18 15:10:31,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1258 transitions. [2022-01-18 15:10:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:31,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:31,288 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:31,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-18 15:10:31,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:31,491 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:31,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1645872537, now seen corresponding path program 117 times [2022-01-18 15:10:31,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:31,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408688532] [2022-01-18 15:10:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:31,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:31,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:31,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408688532] [2022-01-18 15:10:31,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408688532] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:31,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129086844] [2022-01-18 15:10:31,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:10:31,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:31,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:31,617 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:31,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 15:10:31,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:10:31,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:31,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:31,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:31,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:31,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:31,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:31,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:31,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:31,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:31,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:32,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:32,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:32,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:32,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:32,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:32,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:32,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129086844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:32,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:32,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:32,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385427975] [2022-01-18 15:10:32,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:32,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:32,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:32,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:32,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:32,115 INFO L87 Difference]: Start difference. First operand 409 states and 1258 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:32,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:32,294 INFO L93 Difference]: Finished difference Result 563 states and 1678 transitions. [2022-01-18 15:10:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:10:32,294 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:32,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:32,295 INFO L225 Difference]: With dead ends: 563 [2022-01-18 15:10:32,295 INFO L226 Difference]: Without dead ends: 556 [2022-01-18 15:10:32,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:10:32,295 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:32,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 151 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 341 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-01-18 15:10:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-01-18 15:10:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 410. [2022-01-18 15:10:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.0831295843520783) internal successors, (1261), 409 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1261 transitions. [2022-01-18 15:10:32,300 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1261 transitions. Word has length 20 [2022-01-18 15:10:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:32,301 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1261 transitions. [2022-01-18 15:10:32,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1261 transitions. [2022-01-18 15:10:32,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:32,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:32,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:32,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-18 15:10:32,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:32,502 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:32,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:32,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1058956935, now seen corresponding path program 118 times [2022-01-18 15:10:32,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:32,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050713525] [2022-01-18 15:10:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:32,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:32,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:32,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050713525] [2022-01-18 15:10:32,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050713525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:32,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136036501] [2022-01-18 15:10:32,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:10:32,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:32,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:32,636 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:32,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 15:10:32,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:10:32,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:32,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:32,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:32,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:32,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:32,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:32,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:32,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:32,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:32,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:33,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:33,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:33,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:33,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:33,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:33,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:33,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136036501] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:33,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:33,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:33,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317556939] [2022-01-18 15:10:33,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:33,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:33,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:33,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:33,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:33,144 INFO L87 Difference]: Start difference. First operand 410 states and 1261 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:33,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:33,388 INFO L93 Difference]: Finished difference Result 614 states and 1796 transitions. [2022-01-18 15:10:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:10:33,389 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:33,390 INFO L225 Difference]: With dead ends: 614 [2022-01-18 15:10:33,390 INFO L226 Difference]: Without dead ends: 584 [2022-01-18 15:10:33,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:33,390 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:33,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 180 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 514 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-01-18 15:10:33,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-18 15:10:33,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 416. [2022-01-18 15:10:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.072289156626506) internal successors, (1275), 415 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1275 transitions. [2022-01-18 15:10:33,395 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1275 transitions. Word has length 20 [2022-01-18 15:10:33,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:33,395 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1275 transitions. [2022-01-18 15:10:33,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:33,395 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1275 transitions. [2022-01-18 15:10:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:33,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:33,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:33,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:33,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-01-18 15:10:33,596 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:33,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:33,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1734338863, now seen corresponding path program 119 times [2022-01-18 15:10:33,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:33,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807847760] [2022-01-18 15:10:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:33,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:33,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:33,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807847760] [2022-01-18 15:10:33,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807847760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:33,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435108034] [2022-01-18 15:10:33,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:10:33,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:33,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:33,720 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:33,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 15:10:33,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:10:33,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:33,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:33,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:33,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:33,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:33,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:33,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:33,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:33,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:33,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:34,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:34,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:34,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:34,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:34,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:34,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:34,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435108034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:34,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:34,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:34,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510631105] [2022-01-18 15:10:34,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:34,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:34,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:34,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:34,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:34,259 INFO L87 Difference]: Start difference. First operand 416 states and 1275 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:34,464 INFO L93 Difference]: Finished difference Result 587 states and 1729 transitions. [2022-01-18 15:10:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:10:34,464 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:34,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:34,465 INFO L225 Difference]: With dead ends: 587 [2022-01-18 15:10:34,465 INFO L226 Difference]: Without dead ends: 581 [2022-01-18 15:10:34,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:34,465 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:34,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 140 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 394 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-01-18 15:10:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-18 15:10:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 403. [2022-01-18 15:10:34,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.0696517412935322) internal successors, (1234), 402 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:34,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1234 transitions. [2022-01-18 15:10:34,470 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1234 transitions. Word has length 20 [2022-01-18 15:10:34,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:34,470 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1234 transitions. [2022-01-18 15:10:34,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:34,471 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1234 transitions. [2022-01-18 15:10:34,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:34,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:34,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:34,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:34,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:34,672 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:34,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:34,672 INFO L85 PathProgramCache]: Analyzing trace with hash -968313187, now seen corresponding path program 120 times [2022-01-18 15:10:34,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:34,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408279879] [2022-01-18 15:10:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:34,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:34,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:34,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408279879] [2022-01-18 15:10:34,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408279879] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:34,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008506307] [2022-01-18 15:10:34,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:10:34,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:34,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:34,824 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:34,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 15:10:34,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:10:34,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:34,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:34,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:34,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:34,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:35,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:35,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:35,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:35,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:35,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:35,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:35,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:35,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:35,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:35,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:35,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:35,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008506307] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:35,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:35,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:35,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863488001] [2022-01-18 15:10:35,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:35,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:35,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:35,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:35,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:35,310 INFO L87 Difference]: Start difference. First operand 403 states and 1234 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:35,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:35,556 INFO L93 Difference]: Finished difference Result 605 states and 1806 transitions. [2022-01-18 15:10:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:10:35,556 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:35,557 INFO L225 Difference]: With dead ends: 605 [2022-01-18 15:10:35,557 INFO L226 Difference]: Without dead ends: 590 [2022-01-18 15:10:35,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:35,558 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:35,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 204 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 514 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-01-18 15:10:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-01-18 15:10:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 409. [2022-01-18 15:10:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.075980392156863) internal successors, (1255), 408 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1255 transitions. [2022-01-18 15:10:35,562 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1255 transitions. Word has length 20 [2022-01-18 15:10:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:35,563 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1255 transitions. [2022-01-18 15:10:35,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1255 transitions. [2022-01-18 15:10:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:35,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:35,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:35,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-01-18 15:10:35,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:35,764 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:35,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1745197443, now seen corresponding path program 121 times [2022-01-18 15:10:35,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:35,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421235078] [2022-01-18 15:10:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:35,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:35,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:35,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421235078] [2022-01-18 15:10:35,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421235078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:35,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032629921] [2022-01-18 15:10:35,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:10:35,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:35,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:35,916 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:35,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 15:10:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:35,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:35,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:36,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:36,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:36,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:36,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:36,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:36,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:36,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:36,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:36,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:36,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:36,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:36,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:36,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:36,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032629921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:36,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:36,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:36,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117431953] [2022-01-18 15:10:36,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:36,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:36,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:36,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:36,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:36,447 INFO L87 Difference]: Start difference. First operand 409 states and 1255 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:36,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:36,702 INFO L93 Difference]: Finished difference Result 628 states and 1862 transitions. [2022-01-18 15:10:36,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:10:36,702 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:36,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:36,703 INFO L225 Difference]: With dead ends: 628 [2022-01-18 15:10:36,703 INFO L226 Difference]: Without dead ends: 613 [2022-01-18 15:10:36,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:36,703 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:36,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 215 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 526 Invalid, 0 Unknown, 167 Unchecked, 0.2s Time] [2022-01-18 15:10:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-18 15:10:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 407. [2022-01-18 15:10:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0738916256157633) internal successors, (1248), 406 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1248 transitions. [2022-01-18 15:10:36,708 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1248 transitions. Word has length 20 [2022-01-18 15:10:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:36,708 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1248 transitions. [2022-01-18 15:10:36,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:36,708 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1248 transitions. [2022-01-18 15:10:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:36,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:36,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:36,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-18 15:10:36,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:36,909 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:36,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:36,910 INFO L85 PathProgramCache]: Analyzing trace with hash -372207271, now seen corresponding path program 122 times [2022-01-18 15:10:36,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:36,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103307377] [2022-01-18 15:10:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:36,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:37,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:37,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103307377] [2022-01-18 15:10:37,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103307377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:37,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931645664] [2022-01-18 15:10:37,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:10:37,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:37,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:37,056 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:37,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 15:10:37,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:10:37,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:37,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:37,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:37,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:37,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:37,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:37,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:37,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:37,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:37,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:37,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:37,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:37,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:37,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:37,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:37,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:37,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931645664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:37,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:37,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:37,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991055920] [2022-01-18 15:10:37,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:37,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:37,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:37,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:37,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:37,508 INFO L87 Difference]: Start difference. First operand 407 states and 1248 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:37,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:37,745 INFO L93 Difference]: Finished difference Result 599 states and 1791 transitions. [2022-01-18 15:10:37,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:10:37,746 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:37,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:37,747 INFO L225 Difference]: With dead ends: 599 [2022-01-18 15:10:37,747 INFO L226 Difference]: Without dead ends: 584 [2022-01-18 15:10:37,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:37,747 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:37,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 136 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 437 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-01-18 15:10:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-18 15:10:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 407. [2022-01-18 15:10:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0738916256157633) internal successors, (1248), 406 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1248 transitions. [2022-01-18 15:10:37,752 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1248 transitions. Word has length 20 [2022-01-18 15:10:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:37,752 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1248 transitions. [2022-01-18 15:10:37,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1248 transitions. [2022-01-18 15:10:37,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:37,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:37,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:37,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:37,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:37,953 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:37,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:37,954 INFO L85 PathProgramCache]: Analyzing trace with hash 153293369, now seen corresponding path program 123 times [2022-01-18 15:10:37,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:37,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212156706] [2022-01-18 15:10:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:37,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:38,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:38,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212156706] [2022-01-18 15:10:38,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212156706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:38,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330894769] [2022-01-18 15:10:38,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:10:38,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:38,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:38,092 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:38,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 15:10:38,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:10:38,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:38,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:38,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:38,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:38,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:38,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:38,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:38,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:38,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:38,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:38,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:38,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:38,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:38,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:38,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:38,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:38,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330894769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:38,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:38,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:38,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650884758] [2022-01-18 15:10:38,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:38,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:38,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:38,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:38,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:38,582 INFO L87 Difference]: Start difference. First operand 407 states and 1248 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:38,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:38,871 INFO L93 Difference]: Finished difference Result 637 states and 1879 transitions. [2022-01-18 15:10:38,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:10:38,871 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:38,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:38,872 INFO L225 Difference]: With dead ends: 637 [2022-01-18 15:10:38,872 INFO L226 Difference]: Without dead ends: 622 [2022-01-18 15:10:38,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:38,872 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:38,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 216 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 595 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-01-18 15:10:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-18 15:10:38,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 407. [2022-01-18 15:10:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0738916256157633) internal successors, (1248), 406 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1248 transitions. [2022-01-18 15:10:38,877 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1248 transitions. Word has length 20 [2022-01-18 15:10:38,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:38,878 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1248 transitions. [2022-01-18 15:10:38,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1248 transitions. [2022-01-18 15:10:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:38,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:38,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:38,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-01-18 15:10:39,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 15:10:39,079 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:39,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1142353917, now seen corresponding path program 124 times [2022-01-18 15:10:39,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:39,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360900181] [2022-01-18 15:10:39,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:39,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:39,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:39,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360900181] [2022-01-18 15:10:39,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360900181] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:39,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980546139] [2022-01-18 15:10:39,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:10:39,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:39,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:39,244 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:39,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 15:10:39,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:10:39,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:39,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:39,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:39,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:39,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:39,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:39,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:39,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:39,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:39,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:39,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:39,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:39,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:39,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:39,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:39,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:39,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980546139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:39,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:39,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:39,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458324683] [2022-01-18 15:10:39,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:39,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:39,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:39,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:39,703 INFO L87 Difference]: Start difference. First operand 407 states and 1248 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:39,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:39,881 INFO L93 Difference]: Finished difference Result 585 states and 1732 transitions. [2022-01-18 15:10:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:10:39,882 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:39,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:39,883 INFO L225 Difference]: With dead ends: 585 [2022-01-18 15:10:39,883 INFO L226 Difference]: Without dead ends: 570 [2022-01-18 15:10:39,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:10:39,883 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:39,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 176 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 376 Invalid, 0 Unknown, 155 Unchecked, 0.1s Time] [2022-01-18 15:10:39,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-18 15:10:39,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 406. [2022-01-18 15:10:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.0691358024691358) internal successors, (1243), 405 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1243 transitions. [2022-01-18 15:10:39,888 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1243 transitions. Word has length 20 [2022-01-18 15:10:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:39,888 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1243 transitions. [2022-01-18 15:10:39,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1243 transitions. [2022-01-18 15:10:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:39,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:39,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:39,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:40,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 15:10:40,089 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:40,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:40,089 INFO L85 PathProgramCache]: Analyzing trace with hash -864803033, now seen corresponding path program 125 times [2022-01-18 15:10:40,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:40,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719542107] [2022-01-18 15:10:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:40,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:40,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:40,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719542107] [2022-01-18 15:10:40,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719542107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:40,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972017190] [2022-01-18 15:10:40,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:10:40,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:40,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:40,214 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:40,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 15:10:40,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:10:40,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:40,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:40,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:40,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:40,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:40,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:40,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:40,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:40,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:40,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:40,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:40,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:40,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:40,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:40,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:40,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:40,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972017190] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:40,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:40,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:40,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783839404] [2022-01-18 15:10:40,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:40,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:40,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:40,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:40,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:40,652 INFO L87 Difference]: Start difference. First operand 406 states and 1243 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:40,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:40,859 INFO L93 Difference]: Finished difference Result 557 states and 1667 transitions. [2022-01-18 15:10:40,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:10:40,859 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:40,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:40,860 INFO L225 Difference]: With dead ends: 557 [2022-01-18 15:10:40,860 INFO L226 Difference]: Without dead ends: 542 [2022-01-18 15:10:40,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:10:40,861 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:40,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 149 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 476 Invalid, 0 Unknown, 106 Unchecked, 0.2s Time] [2022-01-18 15:10:40,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-01-18 15:10:40,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 409. [2022-01-18 15:10:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.075980392156863) internal successors, (1255), 408 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1255 transitions. [2022-01-18 15:10:40,865 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1255 transitions. Word has length 20 [2022-01-18 15:10:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:40,866 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1255 transitions. [2022-01-18 15:10:40,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1255 transitions. [2022-01-18 15:10:40,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:40,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:40,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:40,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-01-18 15:10:41,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 15:10:41,067 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:41,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:41,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1906357179, now seen corresponding path program 126 times [2022-01-18 15:10:41,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:41,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338417460] [2022-01-18 15:10:41,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:41,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:41,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:41,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338417460] [2022-01-18 15:10:41,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338417460] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:41,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768554266] [2022-01-18 15:10:41,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:10:41,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:41,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:41,192 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:41,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 15:10:41,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:10:41,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:41,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:41,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:41,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:41,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:41,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:41,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:41,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:41,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:41,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:41,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:41,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:41,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:41,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:41,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:41,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:41,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768554266] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:41,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:41,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:41,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290568206] [2022-01-18 15:10:41,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:41,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:41,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:41,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:41,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:41,679 INFO L87 Difference]: Start difference. First operand 409 states and 1255 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:41,904 INFO L93 Difference]: Finished difference Result 583 states and 1731 transitions. [2022-01-18 15:10:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:10:41,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:41,905 INFO L225 Difference]: With dead ends: 583 [2022-01-18 15:10:41,905 INFO L226 Difference]: Without dead ends: 568 [2022-01-18 15:10:41,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:10:41,906 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:41,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 174 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 525 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-01-18 15:10:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-18 15:10:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 408. [2022-01-18 15:10:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.081081081081081) internal successors, (1254), 407 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1254 transitions. [2022-01-18 15:10:41,911 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1254 transitions. Word has length 20 [2022-01-18 15:10:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:41,911 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1254 transitions. [2022-01-18 15:10:41,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:41,911 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1254 transitions. [2022-01-18 15:10:41,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:41,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:41,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:41,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-01-18 15:10:42,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:42,112 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:42,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:42,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2119735025, now seen corresponding path program 127 times [2022-01-18 15:10:42,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:42,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380427745] [2022-01-18 15:10:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:42,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:42,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:42,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380427745] [2022-01-18 15:10:42,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380427745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:42,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634515235] [2022-01-18 15:10:42,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:10:42,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:42,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:42,228 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:42,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 15:10:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:42,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:42,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:42,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:42,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:42,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:42,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:42,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:42,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:42,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:42,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:42,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:42,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:42,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:42,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:42,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:42,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634515235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:42,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:42,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:42,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906135088] [2022-01-18 15:10:42,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:42,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:42,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:42,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:42,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:42,740 INFO L87 Difference]: Start difference. First operand 408 states and 1254 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:42,934 INFO L93 Difference]: Finished difference Result 628 states and 1837 transitions. [2022-01-18 15:10:42,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:10:42,934 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:42,935 INFO L225 Difference]: With dead ends: 628 [2022-01-18 15:10:42,935 INFO L226 Difference]: Without dead ends: 598 [2022-01-18 15:10:42,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:10:42,936 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:42,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 211 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 479 Invalid, 0 Unknown, 171 Unchecked, 0.2s Time] [2022-01-18 15:10:42,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-01-18 15:10:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 416. [2022-01-18 15:10:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 3.072289156626506) internal successors, (1275), 415 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1275 transitions. [2022-01-18 15:10:42,941 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1275 transitions. Word has length 20 [2022-01-18 15:10:42,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:42,941 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1275 transitions. [2022-01-18 15:10:42,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:42,941 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1275 transitions. [2022-01-18 15:10:42,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:42,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:42,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:42,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-01-18 15:10:43,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:43,143 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:43,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:43,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1499850343, now seen corresponding path program 128 times [2022-01-18 15:10:43,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:43,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798636632] [2022-01-18 15:10:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:43,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:43,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:43,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798636632] [2022-01-18 15:10:43,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798636632] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:43,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171084088] [2022-01-18 15:10:43,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:10:43,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:43,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:43,258 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:43,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 15:10:43,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:10:43,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:43,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:43,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:43,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:43,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:43,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:43,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:43,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:43,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:43,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:43,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:43,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:43,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:43,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:43,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:43,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171084088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:43,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:43,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:43,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766239299] [2022-01-18 15:10:43,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:43,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:43,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:43,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:43,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:43,787 INFO L87 Difference]: Start difference. First operand 416 states and 1275 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:44,045 INFO L93 Difference]: Finished difference Result 598 states and 1756 transitions. [2022-01-18 15:10:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:10:44,045 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:44,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:44,046 INFO L225 Difference]: With dead ends: 598 [2022-01-18 15:10:44,046 INFO L226 Difference]: Without dead ends: 592 [2022-01-18 15:10:44,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:44,046 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:44,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 172 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 501 Invalid, 0 Unknown, 144 Unchecked, 0.2s Time] [2022-01-18 15:10:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-18 15:10:44,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 404. [2022-01-18 15:10:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.0719602977667493) internal successors, (1238), 403 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1238 transitions. [2022-01-18 15:10:44,051 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1238 transitions. Word has length 20 [2022-01-18 15:10:44,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:44,051 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1238 transitions. [2022-01-18 15:10:44,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:44,051 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1238 transitions. [2022-01-18 15:10:44,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:44,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:44,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:44,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-01-18 15:10:44,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-01-18 15:10:44,252 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:44,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:44,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1526566391, now seen corresponding path program 129 times [2022-01-18 15:10:44,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:44,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292170709] [2022-01-18 15:10:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:44,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:44,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:44,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292170709] [2022-01-18 15:10:44,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292170709] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:44,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365250656] [2022-01-18 15:10:44,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:10:44,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:44,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:44,380 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:44,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 15:10:44,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:10:44,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:44,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:10:44,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:44,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 15:10:44,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:44,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-01-18 15:10:44,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:44,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 15:10:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:44,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:44,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:44,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:44,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:44,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:44,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:44,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:45,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365250656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:45,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:45,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:45,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438177152] [2022-01-18 15:10:45,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:45,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:45,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:45,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:45,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:45,004 INFO L87 Difference]: Start difference. First operand 404 states and 1238 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:45,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:45,425 INFO L93 Difference]: Finished difference Result 582 states and 1744 transitions. [2022-01-18 15:10:45,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:10:45,425 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:45,426 INFO L225 Difference]: With dead ends: 582 [2022-01-18 15:10:45,426 INFO L226 Difference]: Without dead ends: 552 [2022-01-18 15:10:45,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:10:45,426 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:45,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 221 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 699 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-01-18 15:10:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-18 15:10:45,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 409. [2022-01-18 15:10:45,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.073529411764706) internal successors, (1254), 408 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:45,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1254 transitions. [2022-01-18 15:10:45,431 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1254 transitions. Word has length 20 [2022-01-18 15:10:45,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:45,431 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1254 transitions. [2022-01-18 15:10:45,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1254 transitions. [2022-01-18 15:10:45,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:45,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:45,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:45,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:45,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:45,632 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:45,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1991516649, now seen corresponding path program 130 times [2022-01-18 15:10:45,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:45,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134041843] [2022-01-18 15:10:45,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:45,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:45,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:45,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134041843] [2022-01-18 15:10:45,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134041843] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:45,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722276074] [2022-01-18 15:10:45,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:10:45,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:45,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:45,786 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:45,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 15:10:45,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:10:45,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:45,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:45,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:45,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:45,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:45,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:45,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:45,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:46,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:46,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:46,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:46,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:46,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:46,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:46,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:46,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722276074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:46,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:46,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:46,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696082280] [2022-01-18 15:10:46,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:46,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:46,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:46,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:46,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:46,271 INFO L87 Difference]: Start difference. First operand 409 states and 1254 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:46,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:46,621 INFO L93 Difference]: Finished difference Result 658 states and 1959 transitions. [2022-01-18 15:10:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:10:46,621 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:46,622 INFO L225 Difference]: With dead ends: 658 [2022-01-18 15:10:46,622 INFO L226 Difference]: Without dead ends: 643 [2022-01-18 15:10:46,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:46,622 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 54 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:46,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 254 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 706 Invalid, 0 Unknown, 129 Unchecked, 0.2s Time] [2022-01-18 15:10:46,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-18 15:10:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 407. [2022-01-18 15:10:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0763546798029555) internal successors, (1249), 406 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:46,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1249 transitions. [2022-01-18 15:10:46,627 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1249 transitions. Word has length 20 [2022-01-18 15:10:46,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:46,628 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1249 transitions. [2022-01-18 15:10:46,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:46,628 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1249 transitions. [2022-01-18 15:10:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:46,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:46,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:46,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-01-18 15:10:46,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:46,829 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash 770911021, now seen corresponding path program 131 times [2022-01-18 15:10:46,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:46,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225653848] [2022-01-18 15:10:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:46,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:46,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:46,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225653848] [2022-01-18 15:10:46,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225653848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:46,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565068956] [2022-01-18 15:10:46,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:10:46,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:46,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:46,967 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:46,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 15:10:46,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:10:46,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:46,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:46,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:47,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:47,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:47,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:47,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:47,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:47,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:47,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:47,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:47,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:47,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:47,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:47,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:47,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565068956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:47,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:47,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:47,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070389930] [2022-01-18 15:10:47,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:47,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:47,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:47,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:47,428 INFO L87 Difference]: Start difference. First operand 407 states and 1249 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:47,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:47,796 INFO L93 Difference]: Finished difference Result 703 states and 2070 transitions. [2022-01-18 15:10:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:10:47,797 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:47,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:47,797 INFO L225 Difference]: With dead ends: 703 [2022-01-18 15:10:47,798 INFO L226 Difference]: Without dead ends: 673 [2022-01-18 15:10:47,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:47,798 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 64 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:47,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 211 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:10:47,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-18 15:10:47,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 411. [2022-01-18 15:10:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.0853658536585367) internal successors, (1265), 410 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:47,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1265 transitions. [2022-01-18 15:10:47,803 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1265 transitions. Word has length 20 [2022-01-18 15:10:47,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:47,803 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1265 transitions. [2022-01-18 15:10:47,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1265 transitions. [2022-01-18 15:10:47,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:47,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:47,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:47,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-18 15:10:48,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:48,004 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:48,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:48,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1276443923, now seen corresponding path program 132 times [2022-01-18 15:10:48,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:48,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484783052] [2022-01-18 15:10:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:48,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:48,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:48,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484783052] [2022-01-18 15:10:48,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484783052] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:48,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428401354] [2022-01-18 15:10:48,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:10:48,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:48,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:48,171 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:48,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 15:10:48,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:10:48,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:48,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:48,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:48,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:48,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:48,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:48,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:48,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:48,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:48,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:48,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:48,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:48,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:48,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:48,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:48,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428401354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:48,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:48,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:48,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853106814] [2022-01-18 15:10:48,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:48,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:48,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:48,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:48,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:48,628 INFO L87 Difference]: Start difference. First operand 411 states and 1265 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:48,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:48,994 INFO L93 Difference]: Finished difference Result 695 states and 2050 transitions. [2022-01-18 15:10:48,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:10:48,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:48,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:48,995 INFO L225 Difference]: With dead ends: 695 [2022-01-18 15:10:48,995 INFO L226 Difference]: Without dead ends: 665 [2022-01-18 15:10:48,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:48,996 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:48,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 207 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:10:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-18 15:10:49,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 407. [2022-01-18 15:10:49,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0763546798029555) internal successors, (1249), 406 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1249 transitions. [2022-01-18 15:10:49,001 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1249 transitions. Word has length 20 [2022-01-18 15:10:49,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:49,001 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1249 transitions. [2022-01-18 15:10:49,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1249 transitions. [2022-01-18 15:10:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:49,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:49,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:49,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-18 15:10:49,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-01-18 15:10:49,202 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:49,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1299345011, now seen corresponding path program 133 times [2022-01-18 15:10:49,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:49,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005188471] [2022-01-18 15:10:49,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:49,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:49,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:49,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005188471] [2022-01-18 15:10:49,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005188471] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:49,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390889382] [2022-01-18 15:10:49,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:10:49,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:49,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:49,350 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:49,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 15:10:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:49,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:49,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:49,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:49,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:49,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:49,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:49,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:49,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:49,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:49,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:49,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:49,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:49,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:49,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:49,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390889382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:49,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:49,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:49,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022344770] [2022-01-18 15:10:49,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:49,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:49,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:49,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:49,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:49,839 INFO L87 Difference]: Start difference. First operand 407 states and 1249 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:50,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:50,074 INFO L93 Difference]: Finished difference Result 611 states and 1835 transitions. [2022-01-18 15:10:50,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:10:50,074 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:50,075 INFO L225 Difference]: With dead ends: 611 [2022-01-18 15:10:50,075 INFO L226 Difference]: Without dead ends: 596 [2022-01-18 15:10:50,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:50,075 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:50,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 134 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 461 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-18 15:10:50,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-01-18 15:10:50,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 408. [2022-01-18 15:10:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.081081081081081) internal successors, (1254), 407 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1254 transitions. [2022-01-18 15:10:50,080 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1254 transitions. Word has length 20 [2022-01-18 15:10:50,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:50,080 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1254 transitions. [2022-01-18 15:10:50,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:50,080 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1254 transitions. [2022-01-18 15:10:50,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:50,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:50,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:50,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-01-18 15:10:50,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 15:10:50,281 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:50,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2076229267, now seen corresponding path program 134 times [2022-01-18 15:10:50,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:50,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169700976] [2022-01-18 15:10:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:50,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:50,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:50,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169700976] [2022-01-18 15:10:50,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169700976] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:50,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243624874] [2022-01-18 15:10:50,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:10:50,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:50,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:50,427 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:50,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 15:10:50,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:10:50,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:50,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:50,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:50,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:50,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:50,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:50,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:50,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:50,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:50,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:50,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:50,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:50,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:50,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:50,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:50,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243624874] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:50,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:50,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:50,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126302723] [2022-01-18 15:10:50,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:50,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:50,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:50,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:50,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:50,933 INFO L87 Difference]: Start difference. First operand 408 states and 1254 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:51,205 INFO L93 Difference]: Finished difference Result 668 states and 1982 transitions. [2022-01-18 15:10:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:10:51,206 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:51,207 INFO L225 Difference]: With dead ends: 668 [2022-01-18 15:10:51,207 INFO L226 Difference]: Without dead ends: 653 [2022-01-18 15:10:51,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:51,207 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:51,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 180 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 520 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2022-01-18 15:10:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-18 15:10:51,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 408. [2022-01-18 15:10:51,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.081081081081081) internal successors, (1254), 407 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1254 transitions. [2022-01-18 15:10:51,212 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1254 transitions. Word has length 20 [2022-01-18 15:10:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:51,212 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1254 transitions. [2022-01-18 15:10:51,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1254 transitions. [2022-01-18 15:10:51,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:51,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:51,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:51,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-18 15:10:51,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 15:10:51,414 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:51,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:51,414 INFO L85 PathProgramCache]: Analyzing trace with hash -703239095, now seen corresponding path program 135 times [2022-01-18 15:10:51,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:51,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961208880] [2022-01-18 15:10:51,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:51,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:51,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:51,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961208880] [2022-01-18 15:10:51,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961208880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:51,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365216144] [2022-01-18 15:10:51,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:10:51,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:51,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:51,526 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:51,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 15:10:51,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:10:51,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:51,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:51,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:51,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:51,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:51,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:51,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:51,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:51,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:51,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:51,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:51,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:51,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:51,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:51,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:51,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365216144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:51,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:51,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:10:51,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495591177] [2022-01-18 15:10:51,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:51,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:10:51,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:10:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:10:51,940 INFO L87 Difference]: Start difference. First operand 408 states and 1254 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:52,190 INFO L93 Difference]: Finished difference Result 609 states and 1828 transitions. [2022-01-18 15:10:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:10:52,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:52,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:52,192 INFO L225 Difference]: With dead ends: 609 [2022-01-18 15:10:52,192 INFO L226 Difference]: Without dead ends: 594 [2022-01-18 15:10:52,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:10:52,192 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:52,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 147 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 502 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-18 15:10:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-18 15:10:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 408. [2022-01-18 15:10:52,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.081081081081081) internal successors, (1254), 407 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1254 transitions. [2022-01-18 15:10:52,197 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1254 transitions. Word has length 20 [2022-01-18 15:10:52,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:52,197 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1254 transitions. [2022-01-18 15:10:52,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1254 transitions. [2022-01-18 15:10:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:52,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:52,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:52,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-01-18 15:10:52,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-18 15:10:52,398 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:52,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:52,398 INFO L85 PathProgramCache]: Analyzing trace with hash -177738455, now seen corresponding path program 136 times [2022-01-18 15:10:52,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:52,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581350861] [2022-01-18 15:10:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:52,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:52,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:52,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581350861] [2022-01-18 15:10:52,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581350861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:52,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847709177] [2022-01-18 15:10:52,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:10:52,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:52,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:52,559 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:52,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 15:10:52,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:10:52,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:52,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:52,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:52,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:52,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:52,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:52,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:52,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:52,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:52,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:52,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:52,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:52,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:52,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:52,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:53,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847709177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:53,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:53,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:53,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559360073] [2022-01-18 15:10:53,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:53,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:53,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:53,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:53,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:53,050 INFO L87 Difference]: Start difference. First operand 408 states and 1254 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:53,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:53,333 INFO L93 Difference]: Finished difference Result 668 states and 1975 transitions. [2022-01-18 15:10:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:10:53,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:53,334 INFO L225 Difference]: With dead ends: 668 [2022-01-18 15:10:53,334 INFO L226 Difference]: Without dead ends: 653 [2022-01-18 15:10:53,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:10:53,335 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 60 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:53,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 203 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 541 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-01-18 15:10:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-18 15:10:53,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 408. [2022-01-18 15:10:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.081081081081081) internal successors, (1254), 407 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1254 transitions. [2022-01-18 15:10:53,340 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1254 transitions. Word has length 20 [2022-01-18 15:10:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:53,340 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1254 transitions. [2022-01-18 15:10:53,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1254 transitions. [2022-01-18 15:10:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:53,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:53,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:53,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-01-18 15:10:53,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-18 15:10:53,541 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:53,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:53,541 INFO L85 PathProgramCache]: Analyzing trace with hash 811322093, now seen corresponding path program 137 times [2022-01-18 15:10:53,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:53,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089847825] [2022-01-18 15:10:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:53,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:53,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:53,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089847825] [2022-01-18 15:10:53,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089847825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:53,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669416866] [2022-01-18 15:10:53,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:10:53,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:53,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:53,672 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:53,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 15:10:53,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:10:53,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:53,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:53,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:53,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:53,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:53,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:53,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:53,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:53,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:54,033 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:54,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:10:54,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:54,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:10:54,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:54,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:10:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:54,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669416866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:54,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:54,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:10:54,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042588665] [2022-01-18 15:10:54,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:54,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:10:54,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:54,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:10:54,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:10:54,166 INFO L87 Difference]: Start difference. First operand 408 states and 1254 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:54,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:54,422 INFO L93 Difference]: Finished difference Result 620 states and 1847 transitions. [2022-01-18 15:10:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:10:54,422 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:54,423 INFO L225 Difference]: With dead ends: 620 [2022-01-18 15:10:54,423 INFO L226 Difference]: Without dead ends: 605 [2022-01-18 15:10:54,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:54,424 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:54,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 170 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 508 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-01-18 15:10:54,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-18 15:10:54,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 407. [2022-01-18 15:10:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0763546798029555) internal successors, (1249), 406 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:54,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1249 transitions. [2022-01-18 15:10:54,429 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1249 transitions. Word has length 20 [2022-01-18 15:10:54,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:54,429 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1249 transitions. [2022-01-18 15:10:54,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:54,429 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1249 transitions. [2022-01-18 15:10:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:54,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:54,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:54,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:54,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-01-18 15:10:54,630 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:54,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:54,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1614655713, now seen corresponding path program 138 times [2022-01-18 15:10:54,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:54,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335809830] [2022-01-18 15:10:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:54,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:54,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:54,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335809830] [2022-01-18 15:10:54,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335809830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:54,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254022778] [2022-01-18 15:10:54,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:10:54,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:54,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:54,756 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:54,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 15:10:54,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:10:54,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:54,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:54,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:54,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:54,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:54,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:54,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:54,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:54,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:55,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:55,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:55,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:55,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:55,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:55,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:55,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:55,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254022778] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:55,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:55,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:55,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141377372] [2022-01-18 15:10:55,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:55,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:55,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:55,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:55,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:55,270 INFO L87 Difference]: Start difference. First operand 407 states and 1249 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:55,451 INFO L93 Difference]: Finished difference Result 616 states and 1827 transitions. [2022-01-18 15:10:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:10:55,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:55,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:55,452 INFO L225 Difference]: With dead ends: 616 [2022-01-18 15:10:55,452 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 15:10:55,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:10:55,452 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:55,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 216 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 436 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2022-01-18 15:10:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 15:10:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 415. [2022-01-18 15:10:55,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.0845410628019323) internal successors, (1277), 414 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1277 transitions. [2022-01-18 15:10:55,457 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1277 transitions. Word has length 20 [2022-01-18 15:10:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:55,457 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1277 transitions. [2022-01-18 15:10:55,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1277 transitions. [2022-01-18 15:10:55,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:55,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:55,458 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:55,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:55,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-01-18 15:10:55,658 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:55,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:55,659 INFO L85 PathProgramCache]: Analyzing trace with hash -692953573, now seen corresponding path program 139 times [2022-01-18 15:10:55,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:55,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943970323] [2022-01-18 15:10:55,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:55,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:55,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:55,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943970323] [2022-01-18 15:10:55,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943970323] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:55,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998431542] [2022-01-18 15:10:55,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:10:55,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:55,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:55,789 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:55,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 15:10:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:55,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:55,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:55,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:55,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:56,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:56,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:56,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:56,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:56,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:56,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:56,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:56,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:56,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:56,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:56,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:56,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998431542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:56,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:56,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:56,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580509442] [2022-01-18 15:10:56,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:56,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:56,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:56,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:56,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:56,296 INFO L87 Difference]: Start difference. First operand 415 states and 1277 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:56,586 INFO L93 Difference]: Finished difference Result 641 states and 1905 transitions. [2022-01-18 15:10:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:10:56,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:56,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:56,587 INFO L225 Difference]: With dead ends: 641 [2022-01-18 15:10:56,587 INFO L226 Difference]: Without dead ends: 626 [2022-01-18 15:10:56,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:56,588 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:56,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 231 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 627 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-18 15:10:56,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-18 15:10:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 415. [2022-01-18 15:10:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.0845410628019323) internal successors, (1277), 414 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1277 transitions. [2022-01-18 15:10:56,593 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1277 transitions. Word has length 20 [2022-01-18 15:10:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:56,593 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1277 transitions. [2022-01-18 15:10:56,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1277 transitions. [2022-01-18 15:10:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:56,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:56,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:56,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-01-18 15:10:56,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-01-18 15:10:56,796 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash 632956639, now seen corresponding path program 140 times [2022-01-18 15:10:56,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:56,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462434086] [2022-01-18 15:10:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:56,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:56,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:56,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462434086] [2022-01-18 15:10:56,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462434086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:56,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154290811] [2022-01-18 15:10:56,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:10:56,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:56,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:56,947 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:56,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 15:10:56,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:10:56,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:56,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:56,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:57,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:57,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:57,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:57,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:10:57,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:57,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:57,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:57,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:57,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:57,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:57,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:57,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:57,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:57,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154290811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:57,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:57,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:57,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276939898] [2022-01-18 15:10:57,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:57,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:57,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:57,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:57,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:57,425 INFO L87 Difference]: Start difference. First operand 415 states and 1277 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:57,689 INFO L93 Difference]: Finished difference Result 636 states and 1893 transitions. [2022-01-18 15:10:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:10:57,689 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:57,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:57,690 INFO L225 Difference]: With dead ends: 636 [2022-01-18 15:10:57,690 INFO L226 Difference]: Without dead ends: 606 [2022-01-18 15:10:57,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:10:57,691 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:57,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 174 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 517 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 15:10:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-01-18 15:10:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 411. [2022-01-18 15:10:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.075609756097561) internal successors, (1261), 410 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1261 transitions. [2022-01-18 15:10:57,696 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1261 transitions. Word has length 20 [2022-01-18 15:10:57,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:57,696 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1261 transitions. [2022-01-18 15:10:57,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:57,696 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1261 transitions. [2022-01-18 15:10:57,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:57,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:57,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:57,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-18 15:10:57,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:57,897 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:57,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:57,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1348108309, now seen corresponding path program 141 times [2022-01-18 15:10:57,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:57,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72896806] [2022-01-18 15:10:57,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:57,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:58,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:58,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72896806] [2022-01-18 15:10:58,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72896806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:58,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514553166] [2022-01-18 15:10:58,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:10:58,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:58,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:58,004 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:58,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 15:10:58,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:10:58,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:58,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:58,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:58,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:58,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:58,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:58,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:58,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:58,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:58,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:58,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:58,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:58,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:58,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:58,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:58,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:58,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514553166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:58,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:58,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:10:58,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073381524] [2022-01-18 15:10:58,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:58,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:10:58,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:58,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:10:58,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:10:58,432 INFO L87 Difference]: Start difference. First operand 411 states and 1261 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:58,637 INFO L93 Difference]: Finished difference Result 557 states and 1670 transitions. [2022-01-18 15:10:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:10:58,637 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:58,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:58,638 INFO L225 Difference]: With dead ends: 557 [2022-01-18 15:10:58,638 INFO L226 Difference]: Without dead ends: 527 [2022-01-18 15:10:58,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:10:58,638 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:58,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 137 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 509 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-01-18 15:10:58,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-18 15:10:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 415. [2022-01-18 15:10:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.0845410628019323) internal successors, (1277), 414 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:58,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1277 transitions. [2022-01-18 15:10:58,643 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1277 transitions. Word has length 20 [2022-01-18 15:10:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:58,643 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1277 transitions. [2022-01-18 15:10:58,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1277 transitions. [2022-01-18 15:10:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:58,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:58,643 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:58,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-01-18 15:10:58,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:58,844 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:58,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1935023911, now seen corresponding path program 142 times [2022-01-18 15:10:58,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:58,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409154973] [2022-01-18 15:10:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:58,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:58,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:58,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409154973] [2022-01-18 15:10:58,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409154973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:58,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675785310] [2022-01-18 15:10:58,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:10:58,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:58,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:10:58,963 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:10:58,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 15:10:58,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:10:58,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:10:58,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:10:58,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:10:59,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:59,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:10:59,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:59,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:10:59,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:10:59,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:10:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:59,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:10:59,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:59,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:10:59,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:59,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:10:59,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:10:59,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:10:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:59,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675785310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:10:59,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:10:59,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:10:59,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721953148] [2022-01-18 15:10:59,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:10:59,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:10:59,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:10:59,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:10:59,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:10:59,464 INFO L87 Difference]: Start difference. First operand 415 states and 1277 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:59,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:10:59,663 INFO L93 Difference]: Finished difference Result 621 states and 1825 transitions. [2022-01-18 15:10:59,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:10:59,664 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:10:59,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:10:59,665 INFO L225 Difference]: With dead ends: 621 [2022-01-18 15:10:59,665 INFO L226 Difference]: Without dead ends: 591 [2022-01-18 15:10:59,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:10:59,665 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:10:59,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 140 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 445 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-01-18 15:10:59,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-01-18 15:10:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 411. [2022-01-18 15:10:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.0853658536585367) internal successors, (1265), 410 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1265 transitions. [2022-01-18 15:10:59,670 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1265 transitions. Word has length 20 [2022-01-18 15:10:59,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:10:59,670 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1265 transitions. [2022-01-18 15:10:59,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:10:59,670 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1265 transitions. [2022-01-18 15:10:59,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:10:59,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:10:59,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:10:59,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-01-18 15:10:59,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:10:59,871 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:10:59,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:10:59,871 INFO L85 PathProgramCache]: Analyzing trace with hash -810241379, now seen corresponding path program 143 times [2022-01-18 15:10:59,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:10:59,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314131129] [2022-01-18 15:10:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:10:59,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:10:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:10:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:10:59,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:10:59,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314131129] [2022-01-18 15:10:59,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314131129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:10:59,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076576152] [2022-01-18 15:11:00,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:11:00,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:00,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:00,001 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:00,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 15:11:00,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:11:00,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:00,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:00,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:00,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:00,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:00,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:00,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:00,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:00,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:00,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:00,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:00,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:00,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:00,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:00,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:00,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:00,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076576152] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:00,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:00,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:00,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107624129] [2022-01-18 15:11:00,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:00,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:00,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:00,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:00,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:00,475 INFO L87 Difference]: Start difference. First operand 411 states and 1265 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:00,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:00,712 INFO L93 Difference]: Finished difference Result 604 states and 1799 transitions. [2022-01-18 15:11:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:11:00,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:00,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:00,714 INFO L225 Difference]: With dead ends: 604 [2022-01-18 15:11:00,714 INFO L226 Difference]: Without dead ends: 589 [2022-01-18 15:11:00,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:00,714 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:00,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 166 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 547 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 15:11:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-18 15:11:00,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 413. [2022-01-18 15:11:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.0898058252427183) internal successors, (1273), 412 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1273 transitions. [2022-01-18 15:11:00,719 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1273 transitions. Word has length 20 [2022-01-18 15:11:00,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:00,719 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1273 transitions. [2022-01-18 15:11:00,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1273 transitions. [2022-01-18 15:11:00,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:00,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:00,720 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:00,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-18 15:11:00,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:00,920 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:00,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:00,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1128281889, now seen corresponding path program 144 times [2022-01-18 15:11:00,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:00,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15087974] [2022-01-18 15:11:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:00,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:01,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:01,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15087974] [2022-01-18 15:11:01,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15087974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:01,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124088669] [2022-01-18 15:11:01,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:11:01,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:01,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:01,056 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:01,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 15:11:01,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:11:01,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:01,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:01,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:01,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:01,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:01,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:01,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:01,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:01,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:01,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:01,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:01,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:01,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:01,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:01,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:01,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:01,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124088669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:01,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:01,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:01,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025399800] [2022-01-18 15:11:01,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:01,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:01,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:01,551 INFO L87 Difference]: Start difference. First operand 413 states and 1273 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:01,729 INFO L93 Difference]: Finished difference Result 587 states and 1748 transitions. [2022-01-18 15:11:01,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:11:01,730 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:01,731 INFO L225 Difference]: With dead ends: 587 [2022-01-18 15:11:01,731 INFO L226 Difference]: Without dead ends: 580 [2022-01-18 15:11:01,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:01,731 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:01,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 162 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 372 Invalid, 0 Unknown, 181 Unchecked, 0.1s Time] [2022-01-18 15:11:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-18 15:11:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 414. [2022-01-18 15:11:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.0895883777239708) internal successors, (1276), 413 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1276 transitions. [2022-01-18 15:11:01,736 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1276 transitions. Word has length 20 [2022-01-18 15:11:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:01,736 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1276 transitions. [2022-01-18 15:11:01,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1276 transitions. [2022-01-18 15:11:01,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:01,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:01,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:01,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-01-18 15:11:01,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-01-18 15:11:01,937 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:01,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:01,937 INFO L85 PathProgramCache]: Analyzing trace with hash -541366287, now seen corresponding path program 145 times [2022-01-18 15:11:01,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:01,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949571525] [2022-01-18 15:11:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:01,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:02,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:02,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949571525] [2022-01-18 15:11:02,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949571525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:02,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912741331] [2022-01-18 15:11:02,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:11:02,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:02,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:02,059 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:02,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 15:11:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:02,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:02,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:02,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:02,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:02,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:02,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:02,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:02,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:02,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:02,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:02,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:02,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:02,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:02,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:02,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:02,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912741331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:02,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:02,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:02,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228260855] [2022-01-18 15:11:02,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:02,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:02,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:02,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:02,564 INFO L87 Difference]: Start difference. First operand 414 states and 1276 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:02,662 INFO L93 Difference]: Finished difference Result 614 states and 1805 transitions. [2022-01-18 15:11:02,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:11:02,662 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:02,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:02,663 INFO L225 Difference]: With dead ends: 614 [2022-01-18 15:11:02,663 INFO L226 Difference]: Without dead ends: 584 [2022-01-18 15:11:02,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:11:02,664 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:02,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 134 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 187 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-01-18 15:11:02,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-18 15:11:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 420. [2022-01-18 15:11:02,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 3.0787589498806684) internal successors, (1290), 419 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1290 transitions. [2022-01-18 15:11:02,669 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1290 transitions. Word has length 20 [2022-01-18 15:11:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:02,669 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1290 transitions. [2022-01-18 15:11:02,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:02,669 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1290 transitions. [2022-01-18 15:11:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:02,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:02,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:02,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:02,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:02,870 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:02,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:02,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1216748215, now seen corresponding path program 146 times [2022-01-18 15:11:02,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:02,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101826144] [2022-01-18 15:11:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:02,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:02,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:02,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101826144] [2022-01-18 15:11:02,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101826144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:02,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379803005] [2022-01-18 15:11:02,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:11:02,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:02,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:02,994 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:02,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 15:11:03,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:11:03,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:03,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:03,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:03,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:03,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:03,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:03,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:03,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:03,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:03,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:03,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:03,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:03,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:03,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:03,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:03,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:03,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379803005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:03,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:03,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:03,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960856835] [2022-01-18 15:11:03,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:03,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:03,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:03,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:03,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:03,517 INFO L87 Difference]: Start difference. First operand 420 states and 1290 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:03,763 INFO L93 Difference]: Finished difference Result 609 states and 1793 transitions. [2022-01-18 15:11:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:11:03,764 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:03,765 INFO L225 Difference]: With dead ends: 609 [2022-01-18 15:11:03,765 INFO L226 Difference]: Without dead ends: 603 [2022-01-18 15:11:03,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:11:03,765 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:03,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 167 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 504 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2022-01-18 15:11:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-18 15:11:03,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 407. [2022-01-18 15:11:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0763546798029555) internal successors, (1249), 406 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1249 transitions. [2022-01-18 15:11:03,772 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1249 transitions. Word has length 20 [2022-01-18 15:11:03,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:03,772 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1249 transitions. [2022-01-18 15:11:03,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:03,772 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1249 transitions. [2022-01-18 15:11:03,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:03,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:03,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:03,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:03,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-01-18 15:11:03,995 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:03,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:03,995 INFO L85 PathProgramCache]: Analyzing trace with hash -450722539, now seen corresponding path program 147 times [2022-01-18 15:11:03,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:03,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165653581] [2022-01-18 15:11:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:03,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:04,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:04,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165653581] [2022-01-18 15:11:04,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165653581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:04,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994509322] [2022-01-18 15:11:04,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:11:04,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:04,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:04,126 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:04,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 15:11:04,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:11:04,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:04,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:04,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:04,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:04,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:04,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:04,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:04,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:04,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:04,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:04,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:04,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:04,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:04,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:04,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:04,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994509322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:04,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:04,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:04,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726175856] [2022-01-18 15:11:04,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:04,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:04,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:04,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:04,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:04,616 INFO L87 Difference]: Start difference. First operand 407 states and 1249 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:04,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:04,875 INFO L93 Difference]: Finished difference Result 610 states and 1824 transitions. [2022-01-18 15:11:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:11:04,875 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:04,876 INFO L225 Difference]: With dead ends: 610 [2022-01-18 15:11:04,876 INFO L226 Difference]: Without dead ends: 595 [2022-01-18 15:11:04,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:11:04,877 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:04,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 174 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 546 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-18 15:11:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-18 15:11:04,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 411. [2022-01-18 15:11:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.080487804878049) internal successors, (1263), 410 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1263 transitions. [2022-01-18 15:11:04,882 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1263 transitions. Word has length 20 [2022-01-18 15:11:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:04,882 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1263 transitions. [2022-01-18 15:11:04,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1263 transitions. [2022-01-18 15:11:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:04,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:04,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:04,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:05,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-01-18 15:11:05,083 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:05,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:05,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1227606795, now seen corresponding path program 148 times [2022-01-18 15:11:05,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:05,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644321260] [2022-01-18 15:11:05,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:05,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:05,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:05,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644321260] [2022-01-18 15:11:05,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644321260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:05,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058803368] [2022-01-18 15:11:05,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:11:05,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:05,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:05,246 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:05,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 15:11:05,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:11:05,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:05,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:05,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:05,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:05,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:05,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:05,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:05,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:05,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:05,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:05,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:05,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:05,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:05,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:05,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:05,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058803368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:05,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:05,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:05,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861576481] [2022-01-18 15:11:05,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:05,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:05,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:05,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:05,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:05,756 INFO L87 Difference]: Start difference. First operand 411 states and 1263 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:05,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:05,951 INFO L93 Difference]: Finished difference Result 633 states and 1880 transitions. [2022-01-18 15:11:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:11:05,951 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:05,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:05,952 INFO L225 Difference]: With dead ends: 633 [2022-01-18 15:11:05,952 INFO L226 Difference]: Without dead ends: 618 [2022-01-18 15:11:05,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:11:05,952 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:05,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 133 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 334 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-01-18 15:11:05,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-18 15:11:05,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 411. [2022-01-18 15:11:05,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.080487804878049) internal successors, (1263), 410 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1263 transitions. [2022-01-18 15:11:05,957 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1263 transitions. Word has length 20 [2022-01-18 15:11:05,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:05,958 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1263 transitions. [2022-01-18 15:11:05,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:05,958 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1263 transitions. [2022-01-18 15:11:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:05,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:05,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:05,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-01-18 15:11:06,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:06,159 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:06,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:06,159 INFO L85 PathProgramCache]: Analyzing trace with hash 145383377, now seen corresponding path program 149 times [2022-01-18 15:11:06,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:06,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898125190] [2022-01-18 15:11:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:06,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:06,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:06,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898125190] [2022-01-18 15:11:06,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898125190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:06,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805736442] [2022-01-18 15:11:06,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:11:06,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:06,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:06,293 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:06,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 15:11:06,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:11:06,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:06,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:06,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:06,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:06,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:06,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:06,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:06,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:06,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:06,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:06,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:06,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:06,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:06,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:06,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:06,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805736442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:06,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:06,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:06,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135573430] [2022-01-18 15:11:06,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:06,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:06,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:06,750 INFO L87 Difference]: Start difference. First operand 411 states and 1263 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:06,964 INFO L93 Difference]: Finished difference Result 604 states and 1809 transitions. [2022-01-18 15:11:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:11:06,965 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:06,965 INFO L225 Difference]: With dead ends: 604 [2022-01-18 15:11:06,965 INFO L226 Difference]: Without dead ends: 589 [2022-01-18 15:11:06,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:11:06,966 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:06,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 114 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 337 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-01-18 15:11:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-18 15:11:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 411. [2022-01-18 15:11:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.080487804878049) internal successors, (1263), 410 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1263 transitions. [2022-01-18 15:11:06,971 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1263 transitions. Word has length 20 [2022-01-18 15:11:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:06,971 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1263 transitions. [2022-01-18 15:11:06,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1263 transitions. [2022-01-18 15:11:06,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:06,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:06,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:06,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:07,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2022-01-18 15:11:07,172 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:07,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:07,172 INFO L85 PathProgramCache]: Analyzing trace with hash 670884017, now seen corresponding path program 150 times [2022-01-18 15:11:07,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:07,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057191382] [2022-01-18 15:11:07,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:07,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:07,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:07,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057191382] [2022-01-18 15:11:07,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057191382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:07,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633797437] [2022-01-18 15:11:07,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:11:07,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:07,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:07,304 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:07,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 15:11:07,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:11:07,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:07,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:07,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:07,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:07,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:07,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:07,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:07,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:07,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:07,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:07,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:07,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:07,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:07,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:07,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:07,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633797437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:07,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:07,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:07,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499510206] [2022-01-18 15:11:07,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:07,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:07,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:07,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:07,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:07,785 INFO L87 Difference]: Start difference. First operand 411 states and 1263 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:08,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:08,037 INFO L93 Difference]: Finished difference Result 642 states and 1897 transitions. [2022-01-18 15:11:08,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:11:08,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:08,038 INFO L225 Difference]: With dead ends: 642 [2022-01-18 15:11:08,039 INFO L226 Difference]: Without dead ends: 627 [2022-01-18 15:11:08,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:11:08,039 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:08,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 196 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 513 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-01-18 15:11:08,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-01-18 15:11:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 411. [2022-01-18 15:11:08,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.080487804878049) internal successors, (1263), 410 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1263 transitions. [2022-01-18 15:11:08,044 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1263 transitions. Word has length 20 [2022-01-18 15:11:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:08,044 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1263 transitions. [2022-01-18 15:11:08,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1263 transitions. [2022-01-18 15:11:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:08,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:08,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:08,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:08,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:08,267 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:08,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1659944565, now seen corresponding path program 151 times [2022-01-18 15:11:08,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:08,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576358342] [2022-01-18 15:11:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:08,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:08,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:08,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576358342] [2022-01-18 15:11:08,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576358342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:08,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808056685] [2022-01-18 15:11:08,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:11:08,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:08,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:08,408 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:08,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 15:11:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:08,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:08,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:08,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:08,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:08,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:08,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:08,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:08,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:08,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:08,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:08,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:08,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:08,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:08,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:08,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808056685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:08,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:08,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:08,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309652889] [2022-01-18 15:11:08,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:08,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:08,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:08,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:08,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:08,874 INFO L87 Difference]: Start difference. First operand 411 states and 1263 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:09,137 INFO L93 Difference]: Finished difference Result 632 states and 1874 transitions. [2022-01-18 15:11:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:11:09,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:09,138 INFO L225 Difference]: With dead ends: 632 [2022-01-18 15:11:09,138 INFO L226 Difference]: Without dead ends: 617 [2022-01-18 15:11:09,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:11:09,139 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:09,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 169 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 499 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-01-18 15:11:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-01-18 15:11:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 410. [2022-01-18 15:11:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.075794621026895) internal successors, (1258), 409 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1258 transitions. [2022-01-18 15:11:09,144 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1258 transitions. Word has length 20 [2022-01-18 15:11:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:09,144 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1258 transitions. [2022-01-18 15:11:09,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:09,144 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1258 transitions. [2022-01-18 15:11:09,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:09,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:09,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:09,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-01-18 15:11:09,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:09,345 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:09,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:09,345 INFO L85 PathProgramCache]: Analyzing trace with hash -347212385, now seen corresponding path program 152 times [2022-01-18 15:11:09,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:09,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486702416] [2022-01-18 15:11:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:09,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:09,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:09,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486702416] [2022-01-18 15:11:09,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486702416] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:09,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848079603] [2022-01-18 15:11:09,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:11:09,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:09,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:09,479 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:09,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 15:11:09,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:11:09,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:09,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:09,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:09,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:09,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:09,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:09,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:09,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:09,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:09,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:09,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:09,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:09,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:09,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:09,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:09,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:09,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848079603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:09,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:09,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:09,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386169813] [2022-01-18 15:11:09,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:09,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:09,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:09,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:09,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:09,929 INFO L87 Difference]: Start difference. First operand 410 states and 1258 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:10,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:10,154 INFO L93 Difference]: Finished difference Result 564 states and 1690 transitions. [2022-01-18 15:11:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:11:10,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:10,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:10,156 INFO L225 Difference]: With dead ends: 564 [2022-01-18 15:11:10,156 INFO L226 Difference]: Without dead ends: 549 [2022-01-18 15:11:10,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:10,156 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:10,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 152 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 534 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-01-18 15:11:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-18 15:11:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 411. [2022-01-18 15:11:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.080487804878049) internal successors, (1263), 410 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1263 transitions. [2022-01-18 15:11:10,162 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1263 transitions. Word has length 20 [2022-01-18 15:11:10,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:10,162 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1263 transitions. [2022-01-18 15:11:10,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:10,162 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1263 transitions. [2022-01-18 15:11:10,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:10,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:10,162 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:10,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:10,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:10,363 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1871019469, now seen corresponding path program 153 times [2022-01-18 15:11:10,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998924366] [2022-01-18 15:11:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:10,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:10,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:10,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998924366] [2022-01-18 15:11:10,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998924366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:10,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184684888] [2022-01-18 15:11:10,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:11:10,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:10,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:10,504 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:10,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 15:11:10,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:11:10,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:10,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:10,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:10,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:10,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:10,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:10,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:10,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:10,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:10,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:10,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:10,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:10,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:10,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:10,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:10,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184684888] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:10,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:10,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:10,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667587443] [2022-01-18 15:11:10,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:10,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:10,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:10,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:10,922 INFO L87 Difference]: Start difference. First operand 411 states and 1263 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:11,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:11,208 INFO L93 Difference]: Finished difference Result 620 states and 1828 transitions. [2022-01-18 15:11:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:11:11,209 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:11,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:11,210 INFO L225 Difference]: With dead ends: 620 [2022-01-18 15:11:11,210 INFO L226 Difference]: Without dead ends: 590 [2022-01-18 15:11:11,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:11,210 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:11,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 193 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:11:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-01-18 15:11:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 407. [2022-01-18 15:11:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0763546798029555) internal successors, (1249), 406 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1249 transitions. [2022-01-18 15:11:11,216 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1249 transitions. Word has length 20 [2022-01-18 15:11:11,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:11,216 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1249 transitions. [2022-01-18 15:11:11,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:11,216 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1249 transitions. [2022-01-18 15:11:11,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:11,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:11,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:11,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-01-18 15:11:11,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:11,435 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:11,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1120583433, now seen corresponding path program 154 times [2022-01-18 15:11:11,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:11,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418795005] [2022-01-18 15:11:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:11,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:11,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:11,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418795005] [2022-01-18 15:11:11,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418795005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:11,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692939572] [2022-01-18 15:11:11,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:11:11,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:11,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:11,582 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:11,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 15:11:11,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:11:11,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:11,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:11,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:11,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:11,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:11,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:11,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:11,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:11,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:11,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:11,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:11,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:11,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692939572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:11,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:11,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:11:11,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719792641] [2022-01-18 15:11:11,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:11,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:11:11,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:11:11,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:11:11,964 INFO L87 Difference]: Start difference. First operand 407 states and 1249 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:12,333 INFO L93 Difference]: Finished difference Result 758 states and 2264 transitions. [2022-01-18 15:11:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:11:12,333 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:12,334 INFO L225 Difference]: With dead ends: 758 [2022-01-18 15:11:12,334 INFO L226 Difference]: Without dead ends: 743 [2022-01-18 15:11:12,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:11:12,335 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 125 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:12,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 147 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:11:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-18 15:11:12,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 410. [2022-01-18 15:11:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.075794621026895) internal successors, (1258), 409 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:12,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1258 transitions. [2022-01-18 15:11:12,340 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1258 transitions. Word has length 20 [2022-01-18 15:11:12,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:12,340 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1258 transitions. [2022-01-18 15:11:12,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:12,340 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1258 transitions. [2022-01-18 15:11:12,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:12,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:12,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:12,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-01-18 15:11:12,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:12,541 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:12,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:12,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1256961823, now seen corresponding path program 155 times [2022-01-18 15:11:12,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:12,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063037499] [2022-01-18 15:11:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:12,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:12,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:12,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063037499] [2022-01-18 15:11:12,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063037499] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:12,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791481690] [2022-01-18 15:11:12,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:11:12,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:12,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:12,669 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:12,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 15:11:12,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:11:12,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:12,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:12,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:12,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:12,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:12,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:12,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:12,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:13,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:13,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:13,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:13,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:13,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791481690] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:13,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:13,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:11:13,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640282783] [2022-01-18 15:11:13,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:13,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:11:13,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:13,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:11:13,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:11:13,097 INFO L87 Difference]: Start difference. First operand 410 states and 1258 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:13,397 INFO L93 Difference]: Finished difference Result 643 states and 1921 transitions. [2022-01-18 15:11:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:11:13,398 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:13,398 INFO L225 Difference]: With dead ends: 643 [2022-01-18 15:11:13,399 INFO L226 Difference]: Without dead ends: 628 [2022-01-18 15:11:13,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:13,399 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 67 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:13,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 180 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:11:13,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-18 15:11:13,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 413. [2022-01-18 15:11:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.075242718446602) internal successors, (1267), 412 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:13,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1267 transitions. [2022-01-18 15:11:13,404 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1267 transitions. Word has length 20 [2022-01-18 15:11:13,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:13,404 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1267 transitions. [2022-01-18 15:11:13,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:13,404 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1267 transitions. [2022-01-18 15:11:13,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:13,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:13,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:13,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-01-18 15:11:13,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:13,605 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:13,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:13,605 INFO L85 PathProgramCache]: Analyzing trace with hash -660855907, now seen corresponding path program 156 times [2022-01-18 15:11:13,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:13,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778225469] [2022-01-18 15:11:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:13,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:13,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:13,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778225469] [2022-01-18 15:11:13,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778225469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:13,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879543418] [2022-01-18 15:11:13,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:11:13,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:13,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:13,728 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:13,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 15:11:13,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:11:13,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:13,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:13,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:13,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:13,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:13,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:14,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:14,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:14,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:14,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:14,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:14,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:14,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879543418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:14,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:14,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:11:14,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477406635] [2022-01-18 15:11:14,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:14,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:11:14,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:14,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:11:14,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:11:14,142 INFO L87 Difference]: Start difference. First operand 413 states and 1267 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:14,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:14,547 INFO L93 Difference]: Finished difference Result 655 states and 1951 transitions. [2022-01-18 15:11:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:11:14,548 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:14,549 INFO L225 Difference]: With dead ends: 655 [2022-01-18 15:11:14,549 INFO L226 Difference]: Without dead ends: 640 [2022-01-18 15:11:14,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:14,549 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:14,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 213 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:11:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-01-18 15:11:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 413. [2022-01-18 15:11:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.075242718446602) internal successors, (1267), 412 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1267 transitions. [2022-01-18 15:11:14,555 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1267 transitions. Word has length 20 [2022-01-18 15:11:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:14,555 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1267 transitions. [2022-01-18 15:11:14,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1267 transitions. [2022-01-18 15:11:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:14,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:14,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:14,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:14,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-01-18 15:11:14,775 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:14,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:14,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1153451669, now seen corresponding path program 157 times [2022-01-18 15:11:14,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:14,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257458404] [2022-01-18 15:11:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:14,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:14,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:14,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257458404] [2022-01-18 15:11:14,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257458404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:14,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217010808] [2022-01-18 15:11:14,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:11:14,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:14,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:14,913 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:14,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 15:11:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:14,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:14,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:15,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:15,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:15,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:15,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:15,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:15,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:15,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:15,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:15,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:15,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217010808] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:15,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:15,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:11:15,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924784077] [2022-01-18 15:11:15,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:15,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:11:15,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:15,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:11:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:11:15,401 INFO L87 Difference]: Start difference. First operand 413 states and 1267 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:15,723 INFO L93 Difference]: Finished difference Result 609 states and 1820 transitions. [2022-01-18 15:11:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:11:15,724 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:15,725 INFO L225 Difference]: With dead ends: 609 [2022-01-18 15:11:15,725 INFO L226 Difference]: Without dead ends: 594 [2022-01-18 15:11:15,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:15,725 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 70 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:15,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 166 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:11:15,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-18 15:11:15,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 410. [2022-01-18 15:11:15,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 3.075794621026895) internal successors, (1258), 409 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:15,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1258 transitions. [2022-01-18 15:11:15,731 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1258 transitions. Word has length 20 [2022-01-18 15:11:15,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:15,731 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1258 transitions. [2022-01-18 15:11:15,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1258 transitions. [2022-01-18 15:11:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:15,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:15,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:15,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:15,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-01-18 15:11:15,959 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:15,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:15,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1295514809, now seen corresponding path program 158 times [2022-01-18 15:11:15,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:15,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54112354] [2022-01-18 15:11:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:15,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:16,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:16,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54112354] [2022-01-18 15:11:16,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54112354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:16,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121631654] [2022-01-18 15:11:16,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:11:16,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:16,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:16,139 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:16,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 15:11:16,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:11:16,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:16,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:16,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:16,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:16,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:16,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:16,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:16,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:16,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:16,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:11:16,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:16,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:11:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:16,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121631654] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:16,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:16,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:11:16,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677518614] [2022-01-18 15:11:16,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:16,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:11:16,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:16,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:11:16,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:11:16,784 INFO L87 Difference]: Start difference. First operand 410 states and 1258 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:17,462 INFO L93 Difference]: Finished difference Result 720 states and 2154 transitions. [2022-01-18 15:11:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:11:17,462 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:17,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:17,463 INFO L225 Difference]: With dead ends: 720 [2022-01-18 15:11:17,463 INFO L226 Difference]: Without dead ends: 690 [2022-01-18 15:11:17,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:11:17,464 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:17,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 201 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:11:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-01-18 15:11:17,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 420. [2022-01-18 15:11:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 3.083532219570406) internal successors, (1292), 419 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1292 transitions. [2022-01-18 15:11:17,471 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1292 transitions. Word has length 20 [2022-01-18 15:11:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:17,471 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1292 transitions. [2022-01-18 15:11:17,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1292 transitions. [2022-01-18 15:11:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:17,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:17,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:17,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:17,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-01-18 15:11:17,691 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:17,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash 297451609, now seen corresponding path program 159 times [2022-01-18 15:11:17,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:17,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800823389] [2022-01-18 15:11:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:17,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:17,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:17,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800823389] [2022-01-18 15:11:17,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800823389] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:17,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874912040] [2022-01-18 15:11:17,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:11:17,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:17,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:17,847 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:17,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 15:11:17,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:11:17,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:17,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:11:17,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:18,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:18,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 15:11:18,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:18,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-01-18 15:11:18,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 15:11:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:18,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:18,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:18,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:18,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:18,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:11:18,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:18,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:11:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:18,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874912040] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:18,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:18,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:18,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773742112] [2022-01-18 15:11:18,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:18,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:18,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:18,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:18,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:18,532 INFO L87 Difference]: Start difference. First operand 420 states and 1292 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:19,322 INFO L93 Difference]: Finished difference Result 701 states and 2125 transitions. [2022-01-18 15:11:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:11:19,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:19,323 INFO L225 Difference]: With dead ends: 701 [2022-01-18 15:11:19,323 INFO L226 Difference]: Without dead ends: 671 [2022-01-18 15:11:19,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:11:19,324 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 104 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:19,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 318 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1050 Invalid, 0 Unknown, 104 Unchecked, 0.4s Time] [2022-01-18 15:11:19,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-01-18 15:11:19,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 423. [2022-01-18 15:11:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 3.0829383886255926) internal successors, (1301), 422 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1301 transitions. [2022-01-18 15:11:19,330 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1301 transitions. Word has length 20 [2022-01-18 15:11:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:19,330 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 1301 transitions. [2022-01-18 15:11:19,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1301 transitions. [2022-01-18 15:11:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:19,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:19,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:19,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-01-18 15:11:19,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:19,531 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:19,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:19,532 INFO L85 PathProgramCache]: Analyzing trace with hash -479432647, now seen corresponding path program 160 times [2022-01-18 15:11:19,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:19,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213622573] [2022-01-18 15:11:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:19,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:19,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:19,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213622573] [2022-01-18 15:11:19,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213622573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:19,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741758166] [2022-01-18 15:11:19,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:11:19,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:19,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:19,635 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:19,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 15:11:19,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:11:19,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:19,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:19,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:19,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:19,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:19,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:19,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:19,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:19,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:19,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:11:19,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:19,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:11:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:20,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741758166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:20,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:20,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:11:20,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272050542] [2022-01-18 15:11:20,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:20,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:11:20,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:20,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:11:20,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:11:20,001 INFO L87 Difference]: Start difference. First operand 423 states and 1301 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:20,545 INFO L93 Difference]: Finished difference Result 697 states and 2098 transitions. [2022-01-18 15:11:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:11:20,545 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:20,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:20,546 INFO L225 Difference]: With dead ends: 697 [2022-01-18 15:11:20,546 INFO L226 Difference]: Without dead ends: 682 [2022-01-18 15:11:20,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:11:20,546 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:20,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 189 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:11:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-18 15:11:20,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 421. [2022-01-18 15:11:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.085714285714286) internal successors, (1296), 420 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1296 transitions. [2022-01-18 15:11:20,552 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1296 transitions. Word has length 20 [2022-01-18 15:11:20,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:20,552 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1296 transitions. [2022-01-18 15:11:20,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1296 transitions. [2022-01-18 15:11:20,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:20,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:20,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:20,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-01-18 15:11:20,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:20,753 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:20,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1031245811, now seen corresponding path program 161 times [2022-01-18 15:11:20,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:20,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35431991] [2022-01-18 15:11:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:20,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:20,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:20,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35431991] [2022-01-18 15:11:20,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35431991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:20,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301251545] [2022-01-18 15:11:20,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:11:20,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:20,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:20,848 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:20,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 15:11:20,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:11:20,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:20,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:20,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:20,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:20,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:20,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:21,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:21,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:21,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:21,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:11:21,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:21,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:11:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:21,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301251545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:21,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:21,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:11:21,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773060020] [2022-01-18 15:11:21,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:21,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:11:21,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:21,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:11:21,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:11:21,202 INFO L87 Difference]: Start difference. First operand 421 states and 1296 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:21,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:21,898 INFO L93 Difference]: Finished difference Result 793 states and 2370 transitions. [2022-01-18 15:11:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:11:21,898 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:21,899 INFO L225 Difference]: With dead ends: 793 [2022-01-18 15:11:21,899 INFO L226 Difference]: Without dead ends: 778 [2022-01-18 15:11:21,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:11:21,900 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 109 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:21,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 187 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:11:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-01-18 15:11:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 419. [2022-01-18 15:11:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.088516746411483) internal successors, (1291), 418 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1291 transitions. [2022-01-18 15:11:21,907 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1291 transitions. Word has length 20 [2022-01-18 15:11:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:21,907 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 1291 transitions. [2022-01-18 15:11:21,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:21,907 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1291 transitions. [2022-01-18 15:11:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:21,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:21,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:21,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-01-18 15:11:22,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-01-18 15:11:22,108 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:22,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:22,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1485616967, now seen corresponding path program 162 times [2022-01-18 15:11:22,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:22,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004835453] [2022-01-18 15:11:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:22,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:22,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:22,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004835453] [2022-01-18 15:11:22,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004835453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:22,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672698596] [2022-01-18 15:11:22,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:11:22,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:22,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:22,247 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:22,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 15:11:22,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:11:22,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:22,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:22,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:22,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:22,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:22,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:22,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:22,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:22,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:22,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:22,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:22,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:22,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:22,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:11:22,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:22,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:11:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:22,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672698596] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:22,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:22,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:22,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515804811] [2022-01-18 15:11:22,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:22,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:22,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:22,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:22,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:22,751 INFO L87 Difference]: Start difference. First operand 419 states and 1291 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:23,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:23,445 INFO L93 Difference]: Finished difference Result 696 states and 2103 transitions. [2022-01-18 15:11:23,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:11:23,446 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:23,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:23,447 INFO L225 Difference]: With dead ends: 696 [2022-01-18 15:11:23,447 INFO L226 Difference]: Without dead ends: 666 [2022-01-18 15:11:23,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:11:23,447 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:23,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 205 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 622 Invalid, 0 Unknown, 283 Unchecked, 0.3s Time] [2022-01-18 15:11:23,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-01-18 15:11:23,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 421. [2022-01-18 15:11:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.0904761904761906) internal successors, (1298), 420 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:23,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1298 transitions. [2022-01-18 15:11:23,452 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1298 transitions. Word has length 20 [2022-01-18 15:11:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:23,452 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1298 transitions. [2022-01-18 15:11:23,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:23,453 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1298 transitions. [2022-01-18 15:11:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:23,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:23,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:23,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-01-18 15:11:23,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:23,654 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:23,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:23,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1508518055, now seen corresponding path program 163 times [2022-01-18 15:11:23,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:23,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189733590] [2022-01-18 15:11:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:23,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:23,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:23,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189733590] [2022-01-18 15:11:23,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189733590] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:23,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950390039] [2022-01-18 15:11:23,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:11:23,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:23,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:23,793 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:23,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 15:11:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:23,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:23,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:23,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:23,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:24,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:24,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:24,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:24,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:24,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:24,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:24,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:24,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:24,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:11:24,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:24,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:11:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:24,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950390039] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:24,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:24,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:24,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859353841] [2022-01-18 15:11:24,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:24,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:24,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:24,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:24,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:24,313 INFO L87 Difference]: Start difference. First operand 421 states and 1298 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:24,942 INFO L93 Difference]: Finished difference Result 705 states and 2123 transitions. [2022-01-18 15:11:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:11:24,943 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:24,944 INFO L225 Difference]: With dead ends: 705 [2022-01-18 15:11:24,944 INFO L226 Difference]: Without dead ends: 675 [2022-01-18 15:11:24,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:11:24,944 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:24,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 265 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 872 Invalid, 0 Unknown, 257 Unchecked, 0.3s Time] [2022-01-18 15:11:24,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-01-18 15:11:24,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 422. [2022-01-18 15:11:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.0950118764845604) internal successors, (1303), 421 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:24,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1303 transitions. [2022-01-18 15:11:24,949 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1303 transitions. Word has length 20 [2022-01-18 15:11:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:24,949 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1303 transitions. [2022-01-18 15:11:24,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:24,949 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1303 transitions. [2022-01-18 15:11:24,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:24,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:24,950 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:24,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-18 15:11:25,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:25,151 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:25,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:25,151 INFO L85 PathProgramCache]: Analyzing trace with hash 2009564985, now seen corresponding path program 164 times [2022-01-18 15:11:25,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:25,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674087866] [2022-01-18 15:11:25,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:25,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:25,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:25,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674087866] [2022-01-18 15:11:25,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674087866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:25,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799555676] [2022-01-18 15:11:25,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:11:25,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:25,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:25,303 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:25,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 15:11:25,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:11:25,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:25,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:25,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:25,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:25,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:25,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:25,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:25,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:25,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:25,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:25,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:25,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:25,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:25,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:11:25,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:25,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:11:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:25,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799555676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:25,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:25,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:25,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462059235] [2022-01-18 15:11:25,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:25,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:25,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:25,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:25,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:25,869 INFO L87 Difference]: Start difference. First operand 422 states and 1303 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:26,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:26,503 INFO L93 Difference]: Finished difference Result 698 states and 2105 transitions. [2022-01-18 15:11:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:11:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:26,504 INFO L225 Difference]: With dead ends: 698 [2022-01-18 15:11:26,504 INFO L226 Difference]: Without dead ends: 683 [2022-01-18 15:11:26,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:11:26,505 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:26,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 289 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 820 Invalid, 0 Unknown, 240 Unchecked, 0.3s Time] [2022-01-18 15:11:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-01-18 15:11:26,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 421. [2022-01-18 15:11:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.0904761904761906) internal successors, (1298), 420 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1298 transitions. [2022-01-18 15:11:26,514 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1298 transitions. Word has length 20 [2022-01-18 15:11:26,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:26,514 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1298 transitions. [2022-01-18 15:11:26,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:26,514 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1298 transitions. [2022-01-18 15:11:26,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:26,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:26,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:26,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-01-18 15:11:26,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-01-18 15:11:26,715 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:26,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:26,715 INFO L85 PathProgramCache]: Analyzing trace with hash -912412139, now seen corresponding path program 165 times [2022-01-18 15:11:26,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:26,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662617346] [2022-01-18 15:11:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:26,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:26,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:26,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662617346] [2022-01-18 15:11:26,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662617346] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:26,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505115380] [2022-01-18 15:11:26,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:11:26,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:26,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:26,825 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:26,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 15:11:26,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:11:26,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:26,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:26,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:26,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:26,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:26,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:27,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:27,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:27,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:27,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:11:27,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:27,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:11:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:27,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505115380] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:27,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:27,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 18 [2022-01-18 15:11:27,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495709601] [2022-01-18 15:11:27,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:27,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:11:27,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:27,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:11:27,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:11:27,257 INFO L87 Difference]: Start difference. First operand 421 states and 1298 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:27,805 INFO L93 Difference]: Finished difference Result 697 states and 2099 transitions. [2022-01-18 15:11:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:11:27,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:27,806 INFO L225 Difference]: With dead ends: 697 [2022-01-18 15:11:27,806 INFO L226 Difference]: Without dead ends: 682 [2022-01-18 15:11:27,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:11:27,807 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 89 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:27,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 194 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:11:27,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-18 15:11:27,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 420. [2022-01-18 15:11:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 3.088305489260143) internal successors, (1294), 419 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1294 transitions. [2022-01-18 15:11:27,812 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1294 transitions. Word has length 20 [2022-01-18 15:11:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:27,812 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1294 transitions. [2022-01-18 15:11:27,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1294 transitions. [2022-01-18 15:11:27,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:27,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:27,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:27,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-01-18 15:11:28,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:28,013 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:28,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:28,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1717649673, now seen corresponding path program 166 times [2022-01-18 15:11:28,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:28,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692030991] [2022-01-18 15:11:28,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:28,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:28,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:28,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692030991] [2022-01-18 15:11:28,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692030991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:28,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220222581] [2022-01-18 15:11:28,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:11:28,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:28,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:28,110 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:28,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 15:11:28,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:11:28,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:28,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:28,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:28,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:28,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:28,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:28,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:28,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:28,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:28,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:11:28,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:28,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:11:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:28,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220222581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:28,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:28,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:11:28,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71401957] [2022-01-18 15:11:28,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:28,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:11:28,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:28,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:11:28,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:11:28,461 INFO L87 Difference]: Start difference. First operand 420 states and 1294 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:29,228 INFO L93 Difference]: Finished difference Result 820 states and 2442 transitions. [2022-01-18 15:11:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:11:29,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:29,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:29,229 INFO L225 Difference]: With dead ends: 820 [2022-01-18 15:11:29,229 INFO L226 Difference]: Without dead ends: 805 [2022-01-18 15:11:29,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:11:29,230 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 100 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:29,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 293 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:11:29,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-18 15:11:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 420. [2022-01-18 15:11:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 3.088305489260143) internal successors, (1294), 419 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1294 transitions. [2022-01-18 15:11:29,235 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1294 transitions. Word has length 20 [2022-01-18 15:11:29,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:29,236 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1294 transitions. [2022-01-18 15:11:29,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1294 transitions. [2022-01-18 15:11:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:29,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:29,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:29,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-01-18 15:11:29,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-01-18 15:11:29,437 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:29,438 INFO L85 PathProgramCache]: Analyzing trace with hash 606055905, now seen corresponding path program 167 times [2022-01-18 15:11:29,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:29,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526634831] [2022-01-18 15:11:29,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:29,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:29,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:29,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526634831] [2022-01-18 15:11:29,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526634831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:29,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341785606] [2022-01-18 15:11:29,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:11:29,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:29,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:29,552 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:29,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 15:11:29,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:11:29,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:29,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:29,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:29,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:29,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:29,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:29,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:29,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:29,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:29,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:29,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:29,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:29,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:29,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:11:29,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:29,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:11:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:30,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341785606] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:30,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:30,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:11:30,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105305757] [2022-01-18 15:11:30,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:30,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:11:30,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:30,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:11:30,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:11:30,044 INFO L87 Difference]: Start difference. First operand 420 states and 1294 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:30,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:30,293 INFO L93 Difference]: Finished difference Result 698 states and 2099 transitions. [2022-01-18 15:11:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:11:30,293 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:30,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:30,294 INFO L225 Difference]: With dead ends: 698 [2022-01-18 15:11:30,294 INFO L226 Difference]: Without dead ends: 668 [2022-01-18 15:11:30,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:30,294 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:30,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 187 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 453 Invalid, 0 Unknown, 143 Unchecked, 0.2s Time] [2022-01-18 15:11:30,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-01-18 15:11:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 426. [2022-01-18 15:11:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.0870588235294116) internal successors, (1312), 425 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1312 transitions. [2022-01-18 15:11:30,299 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1312 transitions. Word has length 20 [2022-01-18 15:11:30,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:30,299 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1312 transitions. [2022-01-18 15:11:30,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:30,300 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1312 transitions. [2022-01-18 15:11:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:30,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:30,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:30,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:30,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-01-18 15:11:30,501 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:30,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:30,501 INFO L85 PathProgramCache]: Analyzing trace with hash -392007295, now seen corresponding path program 168 times [2022-01-18 15:11:30,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:30,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385508243] [2022-01-18 15:11:30,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:30,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:30,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:30,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385508243] [2022-01-18 15:11:30,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385508243] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:30,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634385605] [2022-01-18 15:11:30,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:11:30,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:30,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:30,637 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:30,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 15:11:30,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:11:30,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:30,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:30,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:30,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:30,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:30,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:30,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:30,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:30,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:30,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:30,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:30,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:31,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:31,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:11:31,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:31,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:11:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:31,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634385605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:31,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:31,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:31,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577151525] [2022-01-18 15:11:31,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:31,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:31,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:31,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:31,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:31,139 INFO L87 Difference]: Start difference. First operand 426 states and 1312 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:31,475 INFO L93 Difference]: Finished difference Result 641 states and 1923 transitions. [2022-01-18 15:11:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:11:31,475 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:31,476 INFO L225 Difference]: With dead ends: 641 [2022-01-18 15:11:31,476 INFO L226 Difference]: Without dead ends: 611 [2022-01-18 15:11:31,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:11:31,477 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:31,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 202 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 645 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-01-18 15:11:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-01-18 15:11:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 426. [2022-01-18 15:11:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.0870588235294116) internal successors, (1312), 425 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1312 transitions. [2022-01-18 15:11:31,482 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1312 transitions. Word has length 20 [2022-01-18 15:11:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:31,482 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1312 transitions. [2022-01-18 15:11:31,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1312 transitions. [2022-01-18 15:11:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:31,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:31,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:31,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-01-18 15:11:31,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:31,683 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:31,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:31,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1905470117, now seen corresponding path program 169 times [2022-01-18 15:11:31,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:31,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632652218] [2022-01-18 15:11:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:31,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:31,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:31,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632652218] [2022-01-18 15:11:31,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632652218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:31,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664465160] [2022-01-18 15:11:31,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:11:31,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:31,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:31,826 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:31,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 15:11:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:31,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:31,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:31,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:31,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:32,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:32,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:32,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:32,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:32,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:32,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:32,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:32,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:32,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:11:32,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:32,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:11:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:32,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664465160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:32,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:32,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:32,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680280687] [2022-01-18 15:11:32,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:32,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:32,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:32,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:32,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:32,332 INFO L87 Difference]: Start difference. First operand 426 states and 1312 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:32,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:32,734 INFO L93 Difference]: Finished difference Result 698 states and 2074 transitions. [2022-01-18 15:11:32,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:11:32,734 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:32,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:32,735 INFO L225 Difference]: With dead ends: 698 [2022-01-18 15:11:32,735 INFO L226 Difference]: Without dead ends: 668 [2022-01-18 15:11:32,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:11:32,736 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:32,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 241 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 647 Invalid, 0 Unknown, 186 Unchecked, 0.2s Time] [2022-01-18 15:11:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-01-18 15:11:32,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 426. [2022-01-18 15:11:32,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.0870588235294116) internal successors, (1312), 425 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1312 transitions. [2022-01-18 15:11:32,743 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1312 transitions. Word has length 20 [2022-01-18 15:11:32,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:32,744 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1312 transitions. [2022-01-18 15:11:32,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:32,744 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1312 transitions. [2022-01-18 15:11:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:32,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:32,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:32,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:32,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:32,967 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:32,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:32,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1467795039, now seen corresponding path program 170 times [2022-01-18 15:11:32,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:32,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262324923] [2022-01-18 15:11:32,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:32,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:33,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:33,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262324923] [2022-01-18 15:11:33,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262324923] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:33,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269143785] [2022-01-18 15:11:33,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:11:33,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:33,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:33,108 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:33,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 15:11:33,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:11:33,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:33,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:33,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:33,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:33,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:33,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:33,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:33,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:33,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:33,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:33,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:33,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:33,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:33,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:11:33,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:33,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:11:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:33,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269143785] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:33,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:33,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:33,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193941950] [2022-01-18 15:11:33,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:33,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:33,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:33,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:33,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:33,619 INFO L87 Difference]: Start difference. First operand 426 states and 1312 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:33,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:33,944 INFO L93 Difference]: Finished difference Result 685 states and 2044 transitions. [2022-01-18 15:11:33,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:11:33,944 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:33,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:33,945 INFO L225 Difference]: With dead ends: 685 [2022-01-18 15:11:33,945 INFO L226 Difference]: Without dead ends: 670 [2022-01-18 15:11:33,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:11:33,945 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:33,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 190 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 515 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-01-18 15:11:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-01-18 15:11:33,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 422. [2022-01-18 15:11:33,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.0783847980997625) internal successors, (1296), 421 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1296 transitions. [2022-01-18 15:11:33,950 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1296 transitions. Word has length 20 [2022-01-18 15:11:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:33,951 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1296 transitions. [2022-01-18 15:11:33,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:33,951 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1296 transitions. [2022-01-18 15:11:33,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:33,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:33,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:33,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-01-18 15:11:34,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:34,163 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:34,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:34,163 INFO L85 PathProgramCache]: Analyzing trace with hash 431320001, now seen corresponding path program 171 times [2022-01-18 15:11:34,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:34,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214642685] [2022-01-18 15:11:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:34,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:34,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:34,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214642685] [2022-01-18 15:11:34,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214642685] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:34,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034299063] [2022-01-18 15:11:34,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:11:34,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:34,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:34,282 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:34,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 15:11:34,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:11:34,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:34,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:34,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:34,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:34,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:34,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:34,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:34,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:34,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:34,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:34,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:34,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:11:34,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:34,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:11:34,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:34,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:11:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:34,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034299063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:34,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:34,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:11:34,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975758094] [2022-01-18 15:11:34,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:34,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:11:34,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:34,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:11:34,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:11:34,723 INFO L87 Difference]: Start difference. First operand 422 states and 1296 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:34,990 INFO L93 Difference]: Finished difference Result 629 states and 1887 transitions. [2022-01-18 15:11:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:11:34,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:34,991 INFO L225 Difference]: With dead ends: 629 [2022-01-18 15:11:34,991 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 15:11:34,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:34,991 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:34,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 123 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 419 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-01-18 15:11:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 15:11:34,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 421. [2022-01-18 15:11:34,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.0761904761904764) internal successors, (1292), 420 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1292 transitions. [2022-01-18 15:11:34,999 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1292 transitions. Word has length 20 [2022-01-18 15:11:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:34,999 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1292 transitions. [2022-01-18 15:11:34,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1292 transitions. [2022-01-18 15:11:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:35,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:35,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:35,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:35,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-01-18 15:11:35,222 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:35,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:35,222 INFO L85 PathProgramCache]: Analyzing trace with hash -480096617, now seen corresponding path program 172 times [2022-01-18 15:11:35,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:35,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063899409] [2022-01-18 15:11:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:35,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:35,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:35,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063899409] [2022-01-18 15:11:35,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063899409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:35,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340205089] [2022-01-18 15:11:35,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:11:35,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:35,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:35,356 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:35,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 15:11:35,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:11:35,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:35,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:35,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:35,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:35,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:35,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:35,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:35,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:35,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:35,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:35,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:35,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:35,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:35,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:35,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:35,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340205089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:35,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:35,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:35,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902816156] [2022-01-18 15:11:35,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:35,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:35,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:35,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:35,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:35,842 INFO L87 Difference]: Start difference. First operand 421 states and 1292 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:36,173 INFO L93 Difference]: Finished difference Result 684 states and 2031 transitions. [2022-01-18 15:11:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:11:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:36,175 INFO L225 Difference]: With dead ends: 684 [2022-01-18 15:11:36,175 INFO L226 Difference]: Without dead ends: 654 [2022-01-18 15:11:36,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:11:36,176 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:36,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 224 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 640 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2022-01-18 15:11:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-18 15:11:36,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 429. [2022-01-18 15:11:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.0841121495327104) internal successors, (1320), 428 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1320 transitions. [2022-01-18 15:11:36,181 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1320 transitions. Word has length 20 [2022-01-18 15:11:36,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:36,181 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1320 transitions. [2022-01-18 15:11:36,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1320 transitions. [2022-01-18 15:11:36,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:36,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:36,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:36,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-01-18 15:11:36,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:36,382 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:36,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash 441605523, now seen corresponding path program 173 times [2022-01-18 15:11:36,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:36,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518327462] [2022-01-18 15:11:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:36,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:36,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:36,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518327462] [2022-01-18 15:11:36,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518327462] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:36,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136281637] [2022-01-18 15:11:36,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:11:36,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:36,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:36,496 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:36,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 15:11:36,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:11:36,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:36,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:36,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:36,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:36,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:36,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:36,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:36,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:36,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:36,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:36,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:36,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:36,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:36,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:36,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:36,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:37,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136281637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:37,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:37,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:11:37,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514764382] [2022-01-18 15:11:37,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:37,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:11:37,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:37,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:11:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:11:37,001 INFO L87 Difference]: Start difference. First operand 429 states and 1320 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:37,166 INFO L93 Difference]: Finished difference Result 637 states and 1923 transitions. [2022-01-18 15:11:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:11:37,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:37,168 INFO L225 Difference]: With dead ends: 637 [2022-01-18 15:11:37,168 INFO L226 Difference]: Without dead ends: 622 [2022-01-18 15:11:37,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:11:37,168 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:37,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 200 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 391 Invalid, 0 Unknown, 155 Unchecked, 0.1s Time] [2022-01-18 15:11:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-18 15:11:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 435. [2022-01-18 15:11:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.0944700460829493) internal successors, (1343), 434 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:37,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1343 transitions. [2022-01-18 15:11:37,173 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1343 transitions. Word has length 20 [2022-01-18 15:11:37,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:37,173 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1343 transitions. [2022-01-18 15:11:37,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:37,173 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1343 transitions. [2022-01-18 15:11:37,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:37,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:37,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:37,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:37,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:37,375 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:37,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:37,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1767515735, now seen corresponding path program 174 times [2022-01-18 15:11:37,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:37,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340877676] [2022-01-18 15:11:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:37,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:37,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:37,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340877676] [2022-01-18 15:11:37,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340877676] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:37,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148722416] [2022-01-18 15:11:37,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:11:37,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:37,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:37,507 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:37,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 15:11:37,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:11:37,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:37,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:37,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:37,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:37,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:37,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:37,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:37,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:37,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:37,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:37,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:37,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:37,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:37,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:37,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:37,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:38,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148722416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:38,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:38,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:38,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999432627] [2022-01-18 15:11:38,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:38,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:38,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:38,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:38,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:38,009 INFO L87 Difference]: Start difference. First operand 435 states and 1343 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:38,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:38,338 INFO L93 Difference]: Finished difference Result 680 states and 2035 transitions. [2022-01-18 15:11:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:11:38,338 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:38,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:38,339 INFO L225 Difference]: With dead ends: 680 [2022-01-18 15:11:38,339 INFO L226 Difference]: Without dead ends: 650 [2022-01-18 15:11:38,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:11:38,340 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:38,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 212 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 616 Invalid, 0 Unknown, 193 Unchecked, 0.2s Time] [2022-01-18 15:11:38,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-18 15:11:38,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 434. [2022-01-18 15:11:38,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.0900692840646653) internal successors, (1338), 433 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1338 transitions. [2022-01-18 15:11:38,345 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1338 transitions. Word has length 20 [2022-01-18 15:11:38,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:38,345 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1338 transitions. [2022-01-18 15:11:38,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:38,345 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1338 transitions. [2022-01-18 15:11:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:38,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:38,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:38,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:38,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2022-01-18 15:11:38,546 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:38,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:38,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1812299891, now seen corresponding path program 175 times [2022-01-18 15:11:38,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:38,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294974044] [2022-01-18 15:11:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:38,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:38,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:38,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294974044] [2022-01-18 15:11:38,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294974044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:38,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789428198] [2022-01-18 15:11:38,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:11:38,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:38,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:38,667 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:38,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 15:11:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:38,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:38,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:38,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:38,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:38,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:38,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:38,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:38,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:38,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:39,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:39,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:39,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:39,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:39,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:39,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:39,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789428198] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:39,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:39,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:39,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189619089] [2022-01-18 15:11:39,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:39,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:39,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:39,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:39,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:39,123 INFO L87 Difference]: Start difference. First operand 434 states and 1338 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:39,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:39,406 INFO L93 Difference]: Finished difference Result 613 states and 1840 transitions. [2022-01-18 15:11:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:11:39,406 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:39,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:39,407 INFO L225 Difference]: With dead ends: 613 [2022-01-18 15:11:39,407 INFO L226 Difference]: Without dead ends: 583 [2022-01-18 15:11:39,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:11:39,407 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:39,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 197 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 590 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-01-18 15:11:39,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-18 15:11:39,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 438. [2022-01-18 15:11:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.0983981693363845) internal successors, (1354), 437 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1354 transitions. [2022-01-18 15:11:39,412 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1354 transitions. Word has length 20 [2022-01-18 15:11:39,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:39,412 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1354 transitions. [2022-01-18 15:11:39,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:39,413 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1354 transitions. [2022-01-18 15:11:39,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:39,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:39,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:39,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:39,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:39,635 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:39,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1225384289, now seen corresponding path program 176 times [2022-01-18 15:11:39,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:39,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172543446] [2022-01-18 15:11:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:39,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:39,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:39,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172543446] [2022-01-18 15:11:39,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172543446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:39,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858773729] [2022-01-18 15:11:39,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:11:39,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:39,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:39,751 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:39,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 15:11:39,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:11:39,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:39,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:39,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:39,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:39,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:39,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:39,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:39,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:39,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:39,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:40,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:40,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:40,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:40,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:40,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:40,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:40,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858773729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:40,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:40,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:40,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458669129] [2022-01-18 15:11:40,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:40,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:40,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:40,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:40,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:40,253 INFO L87 Difference]: Start difference. First operand 438 states and 1354 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:40,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:40,506 INFO L93 Difference]: Finished difference Result 628 states and 1867 transitions. [2022-01-18 15:11:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:11:40,507 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:40,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:40,508 INFO L225 Difference]: With dead ends: 628 [2022-01-18 15:11:40,508 INFO L226 Difference]: Without dead ends: 598 [2022-01-18 15:11:40,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:40,508 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:40,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 193 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 566 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-01-18 15:11:40,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-01-18 15:11:40,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 442. [2022-01-18 15:11:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0975056689342404) internal successors, (1366), 441 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1366 transitions. [2022-01-18 15:11:40,513 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1366 transitions. Word has length 20 [2022-01-18 15:11:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:40,513 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1366 transitions. [2022-01-18 15:11:40,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1366 transitions. [2022-01-18 15:11:40,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:40,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:40,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:40,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-01-18 15:11:40,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:40,714 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:40,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:40,715 INFO L85 PathProgramCache]: Analyzing trace with hash 213085173, now seen corresponding path program 177 times [2022-01-18 15:11:40,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:40,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096983578] [2022-01-18 15:11:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:40,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:40,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:40,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096983578] [2022-01-18 15:11:40,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096983578] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:40,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324096414] [2022-01-18 15:11:40,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:11:40,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:40,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:40,846 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:40,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 15:11:40,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:11:40,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:40,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:40,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:40,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:40,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:41,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:41,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:41,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:41,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:41,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:41,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:41,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:41,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:41,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:41,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:41,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:41,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324096414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:41,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:41,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:41,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648996427] [2022-01-18 15:11:41,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:41,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:41,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:41,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:41,305 INFO L87 Difference]: Start difference. First operand 442 states and 1366 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:41,553 INFO L93 Difference]: Finished difference Result 596 states and 1792 transitions. [2022-01-18 15:11:41,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:11:41,553 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:41,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:41,554 INFO L225 Difference]: With dead ends: 596 [2022-01-18 15:11:41,554 INFO L226 Difference]: Without dead ends: 589 [2022-01-18 15:11:41,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:11:41,554 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:41,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 173 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 507 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-01-18 15:11:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-18 15:11:41,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 443. [2022-01-18 15:11:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.0972850678733033) internal successors, (1369), 442 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1369 transitions. [2022-01-18 15:11:41,561 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1369 transitions. Word has length 20 [2022-01-18 15:11:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:41,561 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1369 transitions. [2022-01-18 15:11:41,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1369 transitions. [2022-01-18 15:11:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:41,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:41,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:41,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:41,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:41,762 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:41,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:41,762 INFO L85 PathProgramCache]: Analyzing trace with hash 800000775, now seen corresponding path program 178 times [2022-01-18 15:11:41,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:41,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420607285] [2022-01-18 15:11:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:41,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:41,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:41,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420607285] [2022-01-18 15:11:41,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420607285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:41,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635378319] [2022-01-18 15:11:41,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:11:41,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:41,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:41,880 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:41,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 15:11:41,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:11:41,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:41,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:41,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:41,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:41,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:42,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:42,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:42,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:42,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:42,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:42,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:42,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:42,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:42,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:42,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:42,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:42,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635378319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:42,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:42,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:42,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426385659] [2022-01-18 15:11:42,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:42,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:42,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:42,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:42,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:42,371 INFO L87 Difference]: Start difference. First operand 443 states and 1369 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:42,596 INFO L93 Difference]: Finished difference Result 615 states and 1828 transitions. [2022-01-18 15:11:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:11:42,596 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:42,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:42,597 INFO L225 Difference]: With dead ends: 615 [2022-01-18 15:11:42,597 INFO L226 Difference]: Without dead ends: 601 [2022-01-18 15:11:42,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:42,598 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:42,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 160 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 488 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2022-01-18 15:11:42,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-01-18 15:11:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 445. [2022-01-18 15:11:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.0923423423423424) internal successors, (1373), 444 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1373 transitions. [2022-01-18 15:11:42,603 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1373 transitions. Word has length 20 [2022-01-18 15:11:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:42,603 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 1373 transitions. [2022-01-18 15:11:42,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1373 transitions. [2022-01-18 15:11:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:42,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:42,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:42,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-01-18 15:11:42,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-01-18 15:11:42,819 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:42,820 INFO L85 PathProgramCache]: Analyzing trace with hash 124618847, now seen corresponding path program 179 times [2022-01-18 15:11:42,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:42,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021486338] [2022-01-18 15:11:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:42,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:42,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:42,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021486338] [2022-01-18 15:11:42,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021486338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:42,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365128201] [2022-01-18 15:11:42,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:11:42,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:42,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:42,938 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:42,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 15:11:42,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:11:42,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:42,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:42,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:43,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:43,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:43,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:43,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:43,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:43,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:43,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:43,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:43,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:43,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:43,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:43,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:43,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:43,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365128201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:43,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:43,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:43,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761096925] [2022-01-18 15:11:43,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:43,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:43,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:43,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:43,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:43,437 INFO L87 Difference]: Start difference. First operand 445 states and 1373 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:43,657 INFO L93 Difference]: Finished difference Result 606 states and 1807 transitions. [2022-01-18 15:11:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:11:43,657 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:43,658 INFO L225 Difference]: With dead ends: 606 [2022-01-18 15:11:43,658 INFO L226 Difference]: Without dead ends: 600 [2022-01-18 15:11:43,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:43,658 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 64 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:43,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 155 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 464 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-01-18 15:11:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-18 15:11:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 434. [2022-01-18 15:11:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.0993071593533488) internal successors, (1342), 433 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1342 transitions. [2022-01-18 15:11:43,663 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1342 transitions. Word has length 20 [2022-01-18 15:11:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:43,664 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1342 transitions. [2022-01-18 15:11:43,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1342 transitions. [2022-01-18 15:11:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:43,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:43,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:43,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:43,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-01-18 15:11:43,867 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:43,867 INFO L85 PathProgramCache]: Analyzing trace with hash 324317717, now seen corresponding path program 180 times [2022-01-18 15:11:43,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:43,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468484014] [2022-01-18 15:11:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:43,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:44,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:44,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468484014] [2022-01-18 15:11:44,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468484014] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:44,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830845201] [2022-01-18 15:11:44,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:11:44,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:44,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:44,034 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:44,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 15:11:44,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:11:44,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:44,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:44,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:44,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:44,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:44,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:44,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:44,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:44,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:44,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:44,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:44,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:44,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:44,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:44,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:44,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:44,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830845201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:44,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:44,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:44,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854801237] [2022-01-18 15:11:44,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:44,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:44,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:44,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:44,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:44,499 INFO L87 Difference]: Start difference. First operand 434 states and 1342 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:44,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:44,758 INFO L93 Difference]: Finished difference Result 611 states and 1841 transitions. [2022-01-18 15:11:44,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:11:44,759 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:44,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:44,760 INFO L225 Difference]: With dead ends: 611 [2022-01-18 15:11:44,760 INFO L226 Difference]: Without dead ends: 596 [2022-01-18 15:11:44,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:11:44,760 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:44,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 158 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 534 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 15:11:44,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-01-18 15:11:44,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 436. [2022-01-18 15:11:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.103448275862069) internal successors, (1350), 435 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1350 transitions. [2022-01-18 15:11:44,766 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1350 transitions. Word has length 20 [2022-01-18 15:11:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:44,767 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1350 transitions. [2022-01-18 15:11:44,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1350 transitions. [2022-01-18 15:11:44,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:44,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:44,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:44,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-01-18 15:11:44,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:44,969 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:44,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:44,969 INFO L85 PathProgramCache]: Analyzing trace with hash 6277207, now seen corresponding path program 181 times [2022-01-18 15:11:44,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:44,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357609973] [2022-01-18 15:11:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:44,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:45,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:45,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357609973] [2022-01-18 15:11:45,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357609973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:45,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227917046] [2022-01-18 15:11:45,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:11:45,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:45,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:45,097 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:45,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 15:11:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:45,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:45,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:45,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:45,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:45,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:45,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:45,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:45,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:45,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:45,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:45,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:45,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:45,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:45,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:45,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:45,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227917046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:45,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:45,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:45,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614462040] [2022-01-18 15:11:45,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:45,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:45,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:45,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:45,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:45,592 INFO L87 Difference]: Start difference. First operand 436 states and 1350 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:45,812 INFO L93 Difference]: Finished difference Result 595 states and 1793 transitions. [2022-01-18 15:11:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:11:45,813 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:45,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:45,813 INFO L225 Difference]: With dead ends: 595 [2022-01-18 15:11:45,813 INFO L226 Difference]: Without dead ends: 588 [2022-01-18 15:11:45,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:11:45,814 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:45,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 130 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 414 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 15:11:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-01-18 15:11:45,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 437. [2022-01-18 15:11:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.103211009174312) internal successors, (1353), 436 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1353 transitions. [2022-01-18 15:11:45,819 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1353 transitions. Word has length 20 [2022-01-18 15:11:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:45,819 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1353 transitions. [2022-01-18 15:11:45,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1353 transitions. [2022-01-18 15:11:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:45,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:45,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:45,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:46,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2022-01-18 15:11:46,020 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash 593192809, now seen corresponding path program 182 times [2022-01-18 15:11:46,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:46,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132607235] [2022-01-18 15:11:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:46,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:46,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:46,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132607235] [2022-01-18 15:11:46,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132607235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:46,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804339470] [2022-01-18 15:11:46,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:11:46,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:46,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:46,136 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:46,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 15:11:46,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:11:46,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:46,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:46,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:46,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:46,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:46,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:46,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:46,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:46,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:46,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:46,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:46,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:46,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:46,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:46,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:46,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:46,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804339470] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:46,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:46,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:46,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117525111] [2022-01-18 15:11:46,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:46,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:46,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:46,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:46,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:46,639 INFO L87 Difference]: Start difference. First operand 437 states and 1353 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:46,889 INFO L93 Difference]: Finished difference Result 652 states and 1923 transitions. [2022-01-18 15:11:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:11:46,889 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:46,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:46,890 INFO L225 Difference]: With dead ends: 652 [2022-01-18 15:11:46,890 INFO L226 Difference]: Without dead ends: 622 [2022-01-18 15:11:46,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:46,891 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:46,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 202 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 559 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-01-18 15:11:46,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-18 15:11:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 443. [2022-01-18 15:11:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.0927601809954752) internal successors, (1367), 442 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:46,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1367 transitions. [2022-01-18 15:11:46,897 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1367 transitions. Word has length 20 [2022-01-18 15:11:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:46,897 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1367 transitions. [2022-01-18 15:11:46,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:46,897 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1367 transitions. [2022-01-18 15:11:46,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:46,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:46,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:46,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-01-18 15:11:47,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:47,098 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:47,098 INFO L85 PathProgramCache]: Analyzing trace with hash -82189119, now seen corresponding path program 183 times [2022-01-18 15:11:47,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:47,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196282974] [2022-01-18 15:11:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:47,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:47,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:47,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196282974] [2022-01-18 15:11:47,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196282974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:47,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429216859] [2022-01-18 15:11:47,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:11:47,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:47,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:47,217 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:47,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 15:11:47,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:11:47,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:47,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:47,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:47,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:47,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:47,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:47,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:47,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:47,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:47,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:47,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:47,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:47,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:47,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:47,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:47,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:47,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429216859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:47,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:47,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:47,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59069820] [2022-01-18 15:11:47,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:47,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:47,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:47,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:47,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:47,737 INFO L87 Difference]: Start difference. First operand 443 states and 1367 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:48,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:48,023 INFO L93 Difference]: Finished difference Result 619 states and 1840 transitions. [2022-01-18 15:11:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:11:48,023 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:48,024 INFO L225 Difference]: With dead ends: 619 [2022-01-18 15:11:48,024 INFO L226 Difference]: Without dead ends: 613 [2022-01-18 15:11:48,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:48,024 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:48,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 204 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 659 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2022-01-18 15:11:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-18 15:11:48,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 430. [2022-01-18 15:11:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.090909090909091) internal successors, (1326), 429 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1326 transitions. [2022-01-18 15:11:48,031 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1326 transitions. Word has length 20 [2022-01-18 15:11:48,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:48,031 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1326 transitions. [2022-01-18 15:11:48,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:48,031 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1326 transitions. [2022-01-18 15:11:48,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:48,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:48,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:48,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:48,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:48,239 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:48,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:48,239 INFO L85 PathProgramCache]: Analyzing trace with hash 683836557, now seen corresponding path program 184 times [2022-01-18 15:11:48,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:48,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177529129] [2022-01-18 15:11:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:48,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:48,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:48,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177529129] [2022-01-18 15:11:48,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177529129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:48,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088139446] [2022-01-18 15:11:48,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:11:48,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:48,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:48,371 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:48,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 15:11:48,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:11:48,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:48,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:48,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:48,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:48,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:48,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:48,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:48,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:48,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:48,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:48,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:48,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:48,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:48,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:48,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:48,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:48,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088139446] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:48,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:48,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:48,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570150641] [2022-01-18 15:11:48,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:48,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:48,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:48,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:48,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:48,908 INFO L87 Difference]: Start difference. First operand 430 states and 1326 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:49,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:49,204 INFO L93 Difference]: Finished difference Result 620 states and 1873 transitions. [2022-01-18 15:11:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:11:49,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:49,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:49,206 INFO L225 Difference]: With dead ends: 620 [2022-01-18 15:11:49,206 INFO L226 Difference]: Without dead ends: 605 [2022-01-18 15:11:49,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:11:49,206 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:49,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 193 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 527 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-01-18 15:11:49,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-18 15:11:49,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 432. [2022-01-18 15:11:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.097447795823666) internal successors, (1335), 431 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1335 transitions. [2022-01-18 15:11:49,211 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1335 transitions. Word has length 20 [2022-01-18 15:11:49,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:49,211 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1335 transitions. [2022-01-18 15:11:49,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:49,211 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1335 transitions. [2022-01-18 15:11:49,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:49,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:49,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:49,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-01-18 15:11:49,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:49,412 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:49,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:49,413 INFO L85 PathProgramCache]: Analyzing trace with hash -93047699, now seen corresponding path program 185 times [2022-01-18 15:11:49,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:49,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703773291] [2022-01-18 15:11:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:49,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:49,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:49,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703773291] [2022-01-18 15:11:49,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703773291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:49,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195361675] [2022-01-18 15:11:49,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:11:49,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:49,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:49,543 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:49,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 15:11:49,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:11:49,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:49,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:49,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:49,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:49,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:49,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:49,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:49,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:49,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:49,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:50,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:50,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:50,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:50,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:50,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:50,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:50,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195361675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:50,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:50,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:50,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299319886] [2022-01-18 15:11:50,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:50,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:50,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:50,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:50,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:50,128 INFO L87 Difference]: Start difference. First operand 432 states and 1335 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:50,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:50,417 INFO L93 Difference]: Finished difference Result 639 states and 1921 transitions. [2022-01-18 15:11:50,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:11:50,418 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:50,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:50,419 INFO L225 Difference]: With dead ends: 639 [2022-01-18 15:11:50,419 INFO L226 Difference]: Without dead ends: 624 [2022-01-18 15:11:50,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:11:50,419 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:50,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 211 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 480 Invalid, 0 Unknown, 216 Unchecked, 0.2s Time] [2022-01-18 15:11:50,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-18 15:11:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 432. [2022-01-18 15:11:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.097447795823666) internal successors, (1335), 431 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1335 transitions. [2022-01-18 15:11:50,424 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1335 transitions. Word has length 20 [2022-01-18 15:11:50,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:50,424 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1335 transitions. [2022-01-18 15:11:50,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1335 transitions. [2022-01-18 15:11:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:50,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:50,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:50,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:50,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:50,626 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:50,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:50,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1279942473, now seen corresponding path program 186 times [2022-01-18 15:11:50,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:50,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782015997] [2022-01-18 15:11:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:50,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:50,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:50,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782015997] [2022-01-18 15:11:50,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782015997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:50,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538816204] [2022-01-18 15:11:50,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:11:50,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:50,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:50,807 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:50,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 15:11:50,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:11:50,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:50,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:50,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:50,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:50,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:50,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:50,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:50,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:50,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:51,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:51,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:51,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:51,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:51,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:51,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:51,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:51,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538816204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:51,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:51,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:51,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658443490] [2022-01-18 15:11:51,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:51,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:51,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:51,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:51,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:51,299 INFO L87 Difference]: Start difference. First operand 432 states and 1335 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:51,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:51,615 INFO L93 Difference]: Finished difference Result 618 states and 1866 transitions. [2022-01-18 15:11:51,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:11:51,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:51,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:51,616 INFO L225 Difference]: With dead ends: 618 [2022-01-18 15:11:51,616 INFO L226 Difference]: Without dead ends: 603 [2022-01-18 15:11:51,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:11:51,616 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:51,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 159 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 512 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2022-01-18 15:11:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-18 15:11:51,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 432. [2022-01-18 15:11:51,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.097447795823666) internal successors, (1335), 431 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1335 transitions. [2022-01-18 15:11:51,621 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1335 transitions. Word has length 20 [2022-01-18 15:11:51,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:51,622 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1335 transitions. [2022-01-18 15:11:51,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1335 transitions. [2022-01-18 15:11:51,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:51,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:51,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:51,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-01-18 15:11:51,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:51,840 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:51,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1805443113, now seen corresponding path program 187 times [2022-01-18 15:11:51,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:51,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587043437] [2022-01-18 15:11:51,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:51,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:51,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587043437] [2022-01-18 15:11:51,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587043437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081345380] [2022-01-18 15:11:51,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:11:51,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:51,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:51,977 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:51,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 15:11:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:52,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:52,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:52,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:52,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:52,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:52,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:52,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:52,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:52,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:52,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:52,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:52,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:52,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:52,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:52,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:52,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081345380] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:52,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:52,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:52,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381556246] [2022-01-18 15:11:52,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:52,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:52,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:52,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:52,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:52,559 INFO L87 Difference]: Start difference. First operand 432 states and 1335 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:52,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:52,825 INFO L93 Difference]: Finished difference Result 632 states and 1899 transitions. [2022-01-18 15:11:52,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:11:52,825 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:52,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:52,826 INFO L225 Difference]: With dead ends: 632 [2022-01-18 15:11:52,826 INFO L226 Difference]: Without dead ends: 617 [2022-01-18 15:11:52,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:11:52,826 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:52,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 156 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 424 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-01-18 15:11:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-01-18 15:11:52,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 432. [2022-01-18 15:11:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.097447795823666) internal successors, (1335), 431 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:52,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1335 transitions. [2022-01-18 15:11:52,832 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1335 transitions. Word has length 20 [2022-01-18 15:11:52,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:52,832 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1335 transitions. [2022-01-18 15:11:52,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1335 transitions. [2022-01-18 15:11:52,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:52,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:52,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:52,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-01-18 15:11:53,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2022-01-18 15:11:53,033 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:53,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:53,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1500463635, now seen corresponding path program 188 times [2022-01-18 15:11:53,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:53,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884588622] [2022-01-18 15:11:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:53,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:53,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:53,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884588622] [2022-01-18 15:11:53,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884588622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:53,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25568677] [2022-01-18 15:11:53,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:11:53,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:53,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:53,216 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:53,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 15:11:53,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:11:53,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:53,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:53,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:53,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:53,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:53,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:53,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:11:53,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:53,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:53,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:53,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:53,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:53,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:53,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:53,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:53,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:53,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25568677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:53,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:53,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:53,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498918514] [2022-01-18 15:11:53,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:53,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:53,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:53,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:53,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:53,790 INFO L87 Difference]: Start difference. First operand 432 states and 1335 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:54,074 INFO L93 Difference]: Finished difference Result 626 states and 1884 transitions. [2022-01-18 15:11:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:11:54,074 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:54,075 INFO L225 Difference]: With dead ends: 626 [2022-01-18 15:11:54,075 INFO L226 Difference]: Without dead ends: 611 [2022-01-18 15:11:54,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:11:54,075 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:54,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 147 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 429 Invalid, 0 Unknown, 164 Unchecked, 0.2s Time] [2022-01-18 15:11:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-01-18 15:11:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 431. [2022-01-18 15:11:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.0930232558139537) internal successors, (1330), 430 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1330 transitions. [2022-01-18 15:11:54,081 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1330 transitions. Word has length 20 [2022-01-18 15:11:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:54,081 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1330 transitions. [2022-01-18 15:11:54,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1330 transitions. [2022-01-18 15:11:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:54,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:54,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:54,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-01-18 15:11:54,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-01-18 15:11:54,282 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:54,282 INFO L85 PathProgramCache]: Analyzing trace with hash 787346711, now seen corresponding path program 189 times [2022-01-18 15:11:54,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:54,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384601194] [2022-01-18 15:11:54,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:54,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:54,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:54,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384601194] [2022-01-18 15:11:54,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384601194] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:54,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70573739] [2022-01-18 15:11:54,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:11:54,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:54,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:54,409 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:54,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 15:11:54,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:11:54,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:54,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:54,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:54,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:54,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:54,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:54,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:54,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:54,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:54,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:54,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:54,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:54,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:54,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:54,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:54,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:54,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70573739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:54,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:54,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:54,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670157418] [2022-01-18 15:11:54,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:54,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:54,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:54,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:54,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:54,848 INFO L87 Difference]: Start difference. First operand 431 states and 1330 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:55,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:55,091 INFO L93 Difference]: Finished difference Result 576 states and 1742 transitions. [2022-01-18 15:11:55,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:11:55,091 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:55,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:55,092 INFO L225 Difference]: With dead ends: 576 [2022-01-18 15:11:55,092 INFO L226 Difference]: Without dead ends: 561 [2022-01-18 15:11:55,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:11:55,092 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:55,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 140 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 509 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-01-18 15:11:55,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-01-18 15:11:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 432. [2022-01-18 15:11:55,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.097447795823666) internal successors, (1335), 431 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1335 transitions. [2022-01-18 15:11:55,098 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1335 transitions. Word has length 20 [2022-01-18 15:11:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:55,099 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1335 transitions. [2022-01-18 15:11:55,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:55,099 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1335 transitions. [2022-01-18 15:11:55,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:55,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:55,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:55,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:55,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-01-18 15:11:55,315 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:55,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:55,315 INFO L85 PathProgramCache]: Analyzing trace with hash -736460373, now seen corresponding path program 190 times [2022-01-18 15:11:55,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:55,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933250769] [2022-01-18 15:11:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:55,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:55,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:55,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933250769] [2022-01-18 15:11:55,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933250769] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:55,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920802925] [2022-01-18 15:11:55,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:11:55,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:55,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:55,446 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:55,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 15:11:55,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:11:55,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:55,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:55,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:55,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:55,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:55,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:55,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:55,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:55,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:55,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:55,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:55,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:55,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:55,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:55,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:55,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:55,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920802925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:55,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:55,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:55,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508456354] [2022-01-18 15:11:55,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:55,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:55,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:55,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:55,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:55,920 INFO L87 Difference]: Start difference. First operand 432 states and 1335 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:56,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:56,195 INFO L93 Difference]: Finished difference Result 587 states and 1773 transitions. [2022-01-18 15:11:56,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:11:56,196 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:56,197 INFO L225 Difference]: With dead ends: 587 [2022-01-18 15:11:56,197 INFO L226 Difference]: Without dead ends: 572 [2022-01-18 15:11:56,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:11:56,197 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:56,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 177 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-01-18 15:11:56,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-01-18 15:11:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 434. [2022-01-18 15:11:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.1016166281755195) internal successors, (1343), 433 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1343 transitions. [2022-01-18 15:11:56,202 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1343 transitions. Word has length 20 [2022-01-18 15:11:56,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:56,202 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1343 transitions. [2022-01-18 15:11:56,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:56,202 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1343 transitions. [2022-01-18 15:11:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:56,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:56,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:56,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-01-18 15:11:56,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-01-18 15:11:56,403 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:56,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:56,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1054500883, now seen corresponding path program 191 times [2022-01-18 15:11:56,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:56,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870902149] [2022-01-18 15:11:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:56,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:56,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:56,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870902149] [2022-01-18 15:11:56,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870902149] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:56,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945172215] [2022-01-18 15:11:56,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:11:56,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:56,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:56,529 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:56,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 15:11:56,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:11:56,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:56,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:56,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:56,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:56,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:56,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:56,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:56,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:56,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:56,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:56,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:56,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:56,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:56,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:56,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:56,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:57,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945172215] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:57,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:57,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:57,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359981696] [2022-01-18 15:11:57,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:57,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:57,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:57,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:57,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:57,028 INFO L87 Difference]: Start difference. First operand 434 states and 1343 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:57,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:57,243 INFO L93 Difference]: Finished difference Result 586 states and 1764 transitions. [2022-01-18 15:11:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:11:57,244 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:57,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:57,244 INFO L225 Difference]: With dead ends: 586 [2022-01-18 15:11:57,244 INFO L226 Difference]: Without dead ends: 579 [2022-01-18 15:11:57,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:11:57,245 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:57,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 125 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 397 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-01-18 15:11:57,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-01-18 15:11:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 435. [2022-01-18 15:11:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.1013824884792625) internal successors, (1346), 434 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1346 transitions. [2022-01-18 15:11:57,250 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1346 transitions. Word has length 20 [2022-01-18 15:11:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:57,250 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1346 transitions. [2022-01-18 15:11:57,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1346 transitions. [2022-01-18 15:11:57,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:57,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:57,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:57,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-01-18 15:11:57,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:57,451 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:57,451 INFO L85 PathProgramCache]: Analyzing trace with hash -467585281, now seen corresponding path program 192 times [2022-01-18 15:11:57,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:57,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084345166] [2022-01-18 15:11:57,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:57,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:57,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:57,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084345166] [2022-01-18 15:11:57,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084345166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:57,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172091780] [2022-01-18 15:11:57,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:11:57,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:57,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:57,585 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:57,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 15:11:57,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:11:57,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:57,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:57,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:57,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:57,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:57,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:57,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:57,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:57,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:57,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:58,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:58,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:58,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:58,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:58,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:58,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:58,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172091780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:58,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:58,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:58,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857657981] [2022-01-18 15:11:58,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:58,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:58,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:58,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:58,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:58,119 INFO L87 Difference]: Start difference. First operand 435 states and 1346 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:58,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:58,372 INFO L93 Difference]: Finished difference Result 630 states and 1872 transitions. [2022-01-18 15:11:58,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:11:58,373 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:58,373 INFO L225 Difference]: With dead ends: 630 [2022-01-18 15:11:58,373 INFO L226 Difference]: Without dead ends: 600 [2022-01-18 15:11:58,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:58,374 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:58,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 195 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 592 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-01-18 15:11:58,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-18 15:11:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 443. [2022-01-18 15:11:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.0927601809954752) internal successors, (1367), 442 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1367 transitions. [2022-01-18 15:11:58,380 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1367 transitions. Word has length 20 [2022-01-18 15:11:58,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:58,380 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1367 transitions. [2022-01-18 15:11:58,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1367 transitions. [2022-01-18 15:11:58,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:58,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:58,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:58,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-01-18 15:11:58,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:58,581 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:58,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:58,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1142967209, now seen corresponding path program 193 times [2022-01-18 15:11:58,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:58,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925223708] [2022-01-18 15:11:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:58,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:58,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:58,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925223708] [2022-01-18 15:11:58,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925223708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:58,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111111305] [2022-01-18 15:11:58,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:11:58,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:58,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:58,696 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:58,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 15:11:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:58,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:58,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:58,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:58,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:11:58,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:58,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:11:58,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:58,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:11:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:58,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:11:59,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:59,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:11:59,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:59,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:11:59,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:11:59,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:11:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:59,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111111305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:11:59,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:11:59,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:11:59,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519386088] [2022-01-18 15:11:59,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:11:59,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:11:59,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:11:59,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:11:59,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:11:59,204 INFO L87 Difference]: Start difference. First operand 443 states and 1367 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:11:59,481 INFO L93 Difference]: Finished difference Result 603 states and 1801 transitions. [2022-01-18 15:11:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:11:59,481 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:11:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:11:59,482 INFO L225 Difference]: With dead ends: 603 [2022-01-18 15:11:59,482 INFO L226 Difference]: Without dead ends: 597 [2022-01-18 15:11:59,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:11:59,482 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:11:59,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 261 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 678 Invalid, 0 Unknown, 237 Unchecked, 0.2s Time] [2022-01-18 15:11:59,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-01-18 15:11:59,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 431. [2022-01-18 15:11:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.0930232558139537) internal successors, (1330), 430 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1330 transitions. [2022-01-18 15:11:59,487 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1330 transitions. Word has length 20 [2022-01-18 15:11:59,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:11:59,487 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1330 transitions. [2022-01-18 15:11:59,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:11:59,487 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1330 transitions. [2022-01-18 15:11:59,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:11:59,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:11:59,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:11:59,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-01-18 15:11:59,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-01-18 15:11:59,688 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:11:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:11:59,689 INFO L85 PathProgramCache]: Analyzing trace with hash -377095553, now seen corresponding path program 194 times [2022-01-18 15:11:59,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:11:59,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574881361] [2022-01-18 15:11:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:11:59,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:11:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:11:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:11:59,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:11:59,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574881361] [2022-01-18 15:11:59,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574881361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:11:59,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356513937] [2022-01-18 15:11:59,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:11:59,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:11:59,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:11:59,806 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:11:59,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 15:11:59,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:11:59,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:11:59,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:11:59,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:11:59,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:11:59,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:00,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:00,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:00,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:00,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:00,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:00,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:00,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:00,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:00,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:00,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:00,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:00,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356513937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:00,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:00,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:12:00,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654596245] [2022-01-18 15:12:00,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:00,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:12:00,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:12:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:12:00,341 INFO L87 Difference]: Start difference. First operand 431 states and 1330 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:00,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:00,591 INFO L93 Difference]: Finished difference Result 592 states and 1791 transitions. [2022-01-18 15:12:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:00,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:00,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:00,593 INFO L225 Difference]: With dead ends: 592 [2022-01-18 15:12:00,593 INFO L226 Difference]: Without dead ends: 577 [2022-01-18 15:12:00,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:12:00,593 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:00,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 165 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 504 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-01-18 15:12:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-01-18 15:12:00,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 433. [2022-01-18 15:12:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.0902777777777777) internal successors, (1335), 432 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1335 transitions. [2022-01-18 15:12:00,598 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1335 transitions. Word has length 20 [2022-01-18 15:12:00,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:00,598 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1335 transitions. [2022-01-18 15:12:00,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:00,598 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1335 transitions. [2022-01-18 15:12:00,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:00,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:00,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:00,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-01-18 15:12:00,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-01-18 15:12:00,799 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:00,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:00,799 INFO L85 PathProgramCache]: Analyzing trace with hash 611964995, now seen corresponding path program 195 times [2022-01-18 15:12:00,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:00,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3913475] [2022-01-18 15:12:00,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:00,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:00,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:00,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3913475] [2022-01-18 15:12:00,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3913475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:00,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341008402] [2022-01-18 15:12:00,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:12:00,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:00,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:00,909 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:00,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 15:12:00,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:12:00,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:00,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:00,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:01,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:01,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:01,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:01,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:01,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:01,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:01,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:01,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:01,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:01,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:01,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:01,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:01,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:01,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341008402] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:01,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:01,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:12:01,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028074514] [2022-01-18 15:12:01,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:01,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:12:01,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:01,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:12:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:12:01,367 INFO L87 Difference]: Start difference. First operand 433 states and 1335 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:01,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:01,592 INFO L93 Difference]: Finished difference Result 586 states and 1776 transitions. [2022-01-18 15:12:01,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:12:01,592 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:01,593 INFO L225 Difference]: With dead ends: 586 [2022-01-18 15:12:01,593 INFO L226 Difference]: Without dead ends: 571 [2022-01-18 15:12:01,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:01,593 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:01,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 141 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 441 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2022-01-18 15:12:01,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-18 15:12:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 433. [2022-01-18 15:12:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.0902777777777777) internal successors, (1335), 432 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:01,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1335 transitions. [2022-01-18 15:12:01,598 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1335 transitions. Word has length 20 [2022-01-18 15:12:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:01,598 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1335 transitions. [2022-01-18 15:12:01,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1335 transitions. [2022-01-18 15:12:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:01,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:01,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:01,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-01-18 15:12:01,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-01-18 15:12:01,799 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:01,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:01,800 INFO L85 PathProgramCache]: Analyzing trace with hash 457527477, now seen corresponding path program 196 times [2022-01-18 15:12:01,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:01,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562908773] [2022-01-18 15:12:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:01,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:01,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:01,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562908773] [2022-01-18 15:12:01,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562908773] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:01,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695091020] [2022-01-18 15:12:01,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:12:01,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:01,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:01,906 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:01,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 15:12:01,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:12:01,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:01,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:01,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:02,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:02,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:02,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:02,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:02,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:02,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:02,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:02,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:02,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:02,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:02,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:02,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:02,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:02,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695091020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:02,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:02,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:12:02,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873697134] [2022-01-18 15:12:02,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:02,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:12:02,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:02,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:12:02,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:12:02,330 INFO L87 Difference]: Start difference. First operand 433 states and 1335 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:02,487 INFO L93 Difference]: Finished difference Result 544 states and 1652 transitions. [2022-01-18 15:12:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:12:02,487 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:02,488 INFO L225 Difference]: With dead ends: 544 [2022-01-18 15:12:02,488 INFO L226 Difference]: Without dead ends: 529 [2022-01-18 15:12:02,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:12:02,488 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:02,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 113 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 364 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2022-01-18 15:12:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-18 15:12:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 435. [2022-01-18 15:12:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.0921658986175116) internal successors, (1342), 434 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1342 transitions. [2022-01-18 15:12:02,493 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1342 transitions. Word has length 20 [2022-01-18 15:12:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:02,493 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1342 transitions. [2022-01-18 15:12:02,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:02,493 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1342 transitions. [2022-01-18 15:12:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:02,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:02,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:02,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:02,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:02,694 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:02,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:02,695 INFO L85 PathProgramCache]: Analyzing trace with hash -422911583, now seen corresponding path program 197 times [2022-01-18 15:12:02,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:02,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544277513] [2022-01-18 15:12:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:02,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:02,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:02,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544277513] [2022-01-18 15:12:02,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544277513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:02,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819039528] [2022-01-18 15:12:02,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:12:02,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:02,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:02,816 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:02,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-18 15:12:02,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:12:02,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:02,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:02,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:02,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:02,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:03,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:03,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:03,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:03,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:03,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:03,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:03,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:03,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:03,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:03,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:03,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:03,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819039528] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:03,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:03,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:03,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613290649] [2022-01-18 15:12:03,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:03,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:03,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:03,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:03,294 INFO L87 Difference]: Start difference. First operand 435 states and 1342 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:03,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:03,488 INFO L93 Difference]: Finished difference Result 605 states and 1814 transitions. [2022-01-18 15:12:03,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:03,488 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:03,489 INFO L225 Difference]: With dead ends: 605 [2022-01-18 15:12:03,489 INFO L226 Difference]: Without dead ends: 590 [2022-01-18 15:12:03,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:12:03,489 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:03,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 141 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 393 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-01-18 15:12:03,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-01-18 15:12:03,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 430. [2022-01-18 15:12:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.090909090909091) internal successors, (1326), 429 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1326 transitions. [2022-01-18 15:12:03,494 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1326 transitions. Word has length 20 [2022-01-18 15:12:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:03,494 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1326 transitions. [2022-01-18 15:12:03,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:03,495 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1326 transitions. [2022-01-18 15:12:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:03,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:03,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:03,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-01-18 15:12:03,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:03,696 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2039824767, now seen corresponding path program 198 times [2022-01-18 15:12:03,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:03,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798688971] [2022-01-18 15:12:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:03,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:03,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:03,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798688971] [2022-01-18 15:12:03,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798688971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:03,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209531140] [2022-01-18 15:12:03,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:12:03,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:03,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:03,795 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:03,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-18 15:12:03,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:12:03,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:03,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:03,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:03,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:03,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:03,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:04,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:04,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:04,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:04,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:04,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:04,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:04,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209531140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:04,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:04,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:12:04,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952020522] [2022-01-18 15:12:04,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:04,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:12:04,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:04,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:12:04,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:12:04,196 INFO L87 Difference]: Start difference. First operand 430 states and 1326 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:04,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:04,677 INFO L93 Difference]: Finished difference Result 775 states and 2332 transitions. [2022-01-18 15:12:04,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:12:04,678 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:04,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:04,679 INFO L225 Difference]: With dead ends: 775 [2022-01-18 15:12:04,679 INFO L226 Difference]: Without dead ends: 760 [2022-01-18 15:12:04,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:12:04,679 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 116 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:04,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 189 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:12:04,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-01-18 15:12:04,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 433. [2022-01-18 15:12:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.0902777777777777) internal successors, (1335), 432 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1335 transitions. [2022-01-18 15:12:04,685 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1335 transitions. Word has length 20 [2022-01-18 15:12:04,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:04,685 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1335 transitions. [2022-01-18 15:12:04,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:04,685 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1335 transitions. [2022-01-18 15:12:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:04,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:04,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:04,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:04,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:04,886 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:04,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:04,886 INFO L85 PathProgramCache]: Analyzing trace with hash -122402727, now seen corresponding path program 199 times [2022-01-18 15:12:04,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:04,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839951521] [2022-01-18 15:12:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:04,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:05,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:05,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839951521] [2022-01-18 15:12:05,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839951521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:05,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656920149] [2022-01-18 15:12:05,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:12:05,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:05,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:05,005 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:05,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-18 15:12:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:05,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:05,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:05,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:05,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:05,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:05,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:05,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:05,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:05,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:05,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:05,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:05,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656920149] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:05,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:05,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:12:05,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307560760] [2022-01-18 15:12:05,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:05,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:12:05,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:05,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:12:05,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:12:05,422 INFO L87 Difference]: Start difference. First operand 433 states and 1335 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:05,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:05,803 INFO L93 Difference]: Finished difference Result 665 states and 2003 transitions. [2022-01-18 15:12:05,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:05,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:05,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:05,804 INFO L225 Difference]: With dead ends: 665 [2022-01-18 15:12:05,804 INFO L226 Difference]: Without dead ends: 650 [2022-01-18 15:12:05,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:12:05,804 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:05,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 208 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:12:05,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-18 15:12:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 436. [2022-01-18 15:12:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.089655172413793) internal successors, (1344), 435 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1344 transitions. [2022-01-18 15:12:05,810 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1344 transitions. Word has length 20 [2022-01-18 15:12:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:05,810 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1344 transitions. [2022-01-18 15:12:05,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:05,810 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1344 transitions. [2022-01-18 15:12:05,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:05,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:05,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:05,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-01-18 15:12:06,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-01-18 15:12:06,011 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:06,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:06,011 INFO L85 PathProgramCache]: Analyzing trace with hash 473703189, now seen corresponding path program 200 times [2022-01-18 15:12:06,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:06,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298806962] [2022-01-18 15:12:06,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:06,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:06,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:06,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298806962] [2022-01-18 15:12:06,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298806962] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:06,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158360365] [2022-01-18 15:12:06,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:12:06,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:06,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:06,138 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:06,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-18 15:12:06,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:12:06,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:06,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:06,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:06,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:06,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:06,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:06,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:06,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:06,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:06,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:06,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:06,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:06,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158360365] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:06,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:06,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:12:06,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060215765] [2022-01-18 15:12:06,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:06,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:12:06,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:06,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:12:06,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:12:06,551 INFO L87 Difference]: Start difference. First operand 436 states and 1344 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:07,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:07,018 INFO L93 Difference]: Finished difference Result 677 states and 2033 transitions. [2022-01-18 15:12:07,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:07,019 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:07,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:07,020 INFO L225 Difference]: With dead ends: 677 [2022-01-18 15:12:07,020 INFO L226 Difference]: Without dead ends: 662 [2022-01-18 15:12:07,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:12:07,020 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:07,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 273 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:12:07,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-18 15:12:07,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 436. [2022-01-18 15:12:07,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.089655172413793) internal successors, (1344), 435 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:07,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1344 transitions. [2022-01-18 15:12:07,025 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1344 transitions. Word has length 20 [2022-01-18 15:12:07,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:07,025 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1344 transitions. [2022-01-18 15:12:07,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:07,025 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1344 transitions. [2022-01-18 15:12:07,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:07,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:07,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:07,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-01-18 15:12:07,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-01-18 15:12:07,226 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:07,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:07,227 INFO L85 PathProgramCache]: Analyzing trace with hash -18892573, now seen corresponding path program 201 times [2022-01-18 15:12:07,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:07,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162495758] [2022-01-18 15:12:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:07,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:07,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:07,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162495758] [2022-01-18 15:12:07,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162495758] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:07,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842532945] [2022-01-18 15:12:07,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:12:07,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:07,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:07,360 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:07,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-18 15:12:07,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:12:07,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:07,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:07,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:07,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:07,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:07,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:07,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:07,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:07,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:07,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:07,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:07,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:07,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842532945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:07,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:07,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:12:07,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768520188] [2022-01-18 15:12:07,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:07,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:12:07,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:07,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:12:07,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:12:07,765 INFO L87 Difference]: Start difference. First operand 436 states and 1344 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:08,096 INFO L93 Difference]: Finished difference Result 627 states and 1890 transitions. [2022-01-18 15:12:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:12:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:08,097 INFO L225 Difference]: With dead ends: 627 [2022-01-18 15:12:08,097 INFO L226 Difference]: Without dead ends: 612 [2022-01-18 15:12:08,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:12:08,098 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:08,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 201 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:12:08,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-01-18 15:12:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 430. [2022-01-18 15:12:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.090909090909091) internal successors, (1326), 429 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1326 transitions. [2022-01-18 15:12:08,103 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1326 transitions. Word has length 20 [2022-01-18 15:12:08,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:08,103 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1326 transitions. [2022-01-18 15:12:08,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:08,103 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1326 transitions. [2022-01-18 15:12:08,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:08,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:08,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:08,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-01-18 15:12:08,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-01-18 15:12:08,304 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:08,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:08,304 INFO L85 PathProgramCache]: Analyzing trace with hash -429125391, now seen corresponding path program 202 times [2022-01-18 15:12:08,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:08,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468866443] [2022-01-18 15:12:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:08,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:08,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:08,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468866443] [2022-01-18 15:12:08,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468866443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:08,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839173788] [2022-01-18 15:12:08,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:12:08,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:08,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:08,409 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:08,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-18 15:12:08,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:12:08,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:08,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:08,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:08,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:08,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:08,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:08,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:08,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:08,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:08,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:08,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:08,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:08,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:08,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:12:08,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:08,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:12:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:08,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839173788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:08,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:08,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:12:08,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386021797] [2022-01-18 15:12:08,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:08,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:12:08,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:08,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:12:08,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:12:08,898 INFO L87 Difference]: Start difference. First operand 430 states and 1326 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:09,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:09,277 INFO L93 Difference]: Finished difference Result 655 states and 1970 transitions. [2022-01-18 15:12:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:12:09,277 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:09,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:09,278 INFO L225 Difference]: With dead ends: 655 [2022-01-18 15:12:09,278 INFO L226 Difference]: Without dead ends: 625 [2022-01-18 15:12:09,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:12:09,278 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:09,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 203 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 700 Invalid, 0 Unknown, 128 Unchecked, 0.3s Time] [2022-01-18 15:12:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-18 15:12:09,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 433. [2022-01-18 15:12:09,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.0902777777777777) internal successors, (1335), 432 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1335 transitions. [2022-01-18 15:12:09,284 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1335 transitions. Word has length 20 [2022-01-18 15:12:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:09,284 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1335 transitions. [2022-01-18 15:12:09,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:09,284 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1335 transitions. [2022-01-18 15:12:09,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:09,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:09,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:09,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-01-18 15:12:09,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-01-18 15:12:09,485 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:09,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:09,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1427188591, now seen corresponding path program 203 times [2022-01-18 15:12:09,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:09,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537367994] [2022-01-18 15:12:09,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:09,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:09,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:09,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537367994] [2022-01-18 15:12:09,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537367994] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:09,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116646216] [2022-01-18 15:12:09,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:12:09,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:09,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:09,613 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:09,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-18 15:12:09,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:12:09,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:09,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:09,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:09,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:09,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:09,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:09,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:09,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:09,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:09,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:09,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:09,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:09,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:09,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:12:09,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:09,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:12:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:10,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116646216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:10,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:10,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:10,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238065624] [2022-01-18 15:12:10,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:10,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:10,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:10,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:10,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:10,075 INFO L87 Difference]: Start difference. First operand 433 states and 1335 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:10,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:10,516 INFO L93 Difference]: Finished difference Result 672 states and 2019 transitions. [2022-01-18 15:12:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:12:10,516 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:10,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:10,517 INFO L225 Difference]: With dead ends: 672 [2022-01-18 15:12:10,518 INFO L226 Difference]: Without dead ends: 642 [2022-01-18 15:12:10,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:12:10,518 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:10,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 214 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 738 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-01-18 15:12:10,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-01-18 15:12:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 431. [2022-01-18 15:12:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.0930232558139537) internal successors, (1330), 430 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1330 transitions. [2022-01-18 15:12:10,523 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1330 transitions. Word has length 20 [2022-01-18 15:12:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:10,523 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1330 transitions. [2022-01-18 15:12:10,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1330 transitions. [2022-01-18 15:12:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:10,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:10,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:10,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-01-18 15:12:10,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-01-18 15:12:10,725 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:10,725 INFO L85 PathProgramCache]: Analyzing trace with hash 870288821, now seen corresponding path program 204 times [2022-01-18 15:12:10,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:10,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104111544] [2022-01-18 15:12:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:10,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:10,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:10,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104111544] [2022-01-18 15:12:10,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104111544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:10,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968009249] [2022-01-18 15:12:10,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:12:10,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:10,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:10,860 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:10,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-18 15:12:10,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:12:10,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:10,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:10,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:10,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:10,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:11,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:11,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:11,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:11,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:11,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:11,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:11,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:11,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:11,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:12:11,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:11,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:12:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:11,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968009249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:11,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:11,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:11,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683008981] [2022-01-18 15:12:11,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:11,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:11,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:11,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:11,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:11,361 INFO L87 Difference]: Start difference. First operand 431 states and 1330 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:11,799 INFO L93 Difference]: Finished difference Result 770 states and 2259 transitions. [2022-01-18 15:12:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:12:11,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:11,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:11,800 INFO L225 Difference]: With dead ends: 770 [2022-01-18 15:12:11,800 INFO L226 Difference]: Without dead ends: 725 [2022-01-18 15:12:11,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:12:11,800 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:11,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 177 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 565 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-01-18 15:12:11,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-18 15:12:11,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 435. [2022-01-18 15:12:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.1013824884792625) internal successors, (1346), 434 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1346 transitions. [2022-01-18 15:12:11,806 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1346 transitions. Word has length 20 [2022-01-18 15:12:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:11,806 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1346 transitions. [2022-01-18 15:12:11,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:11,806 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1346 transitions. [2022-01-18 15:12:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:11,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:11,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:11,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-01-18 15:12:12,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2022-01-18 15:12:12,007 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:12,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:12,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1177066123, now seen corresponding path program 205 times [2022-01-18 15:12:12,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:12,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740421654] [2022-01-18 15:12:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:12,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:12,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:12,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740421654] [2022-01-18 15:12:12,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740421654] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:12,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956742524] [2022-01-18 15:12:12,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:12:12,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:12,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:12,154 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:12,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-18 15:12:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:12,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:12,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:12,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:12,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:12,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:12,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:12,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:12,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:12,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:12,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:12,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:12,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:12,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:12:12,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:12,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:12:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:12,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956742524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:12,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:12,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:12,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780073767] [2022-01-18 15:12:12,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:12,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:12,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:12,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:12,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:12,654 INFO L87 Difference]: Start difference. First operand 435 states and 1346 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:13,104 INFO L93 Difference]: Finished difference Result 742 states and 2207 transitions. [2022-01-18 15:12:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:12:13,104 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:13,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:13,105 INFO L225 Difference]: With dead ends: 742 [2022-01-18 15:12:13,105 INFO L226 Difference]: Without dead ends: 712 [2022-01-18 15:12:13,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:12:13,106 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:13,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 202 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 612 Invalid, 0 Unknown, 123 Unchecked, 0.2s Time] [2022-01-18 15:12:13,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-01-18 15:12:13,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 431. [2022-01-18 15:12:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.0930232558139537) internal successors, (1330), 430 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1330 transitions. [2022-01-18 15:12:13,111 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1330 transitions. Word has length 20 [2022-01-18 15:12:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:13,111 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1330 transitions. [2022-01-18 15:12:13,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1330 transitions. [2022-01-18 15:12:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:13,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:13,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:13,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:13,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:13,334 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:13,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:13,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1199967211, now seen corresponding path program 206 times [2022-01-18 15:12:13,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:13,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277850389] [2022-01-18 15:12:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:13,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:13,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:13,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277850389] [2022-01-18 15:12:13,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277850389] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:13,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556552914] [2022-01-18 15:12:13,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:12:13,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:13,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:13,472 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:13,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-18 15:12:13,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:12:13,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:13,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:13,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:13,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:13,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:13,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:13,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:13,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:13,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:13,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:13,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:13,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:13,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:12:13,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:13,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:12:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:13,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556552914] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:13,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:13,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:13,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083259904] [2022-01-18 15:12:13,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:13,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:13,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:13,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:13,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:13,979 INFO L87 Difference]: Start difference. First operand 431 states and 1330 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:14,458 INFO L93 Difference]: Finished difference Result 694 states and 2072 transitions. [2022-01-18 15:12:14,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:12:14,459 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:14,460 INFO L225 Difference]: With dead ends: 694 [2022-01-18 15:12:14,460 INFO L226 Difference]: Without dead ends: 664 [2022-01-18 15:12:14,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:12:14,460 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:14,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 239 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 839 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-01-18 15:12:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-18 15:12:14,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 432. [2022-01-18 15:12:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.097447795823666) internal successors, (1335), 431 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:14,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1335 transitions. [2022-01-18 15:12:14,465 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1335 transitions. Word has length 20 [2022-01-18 15:12:14,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:14,465 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1335 transitions. [2022-01-18 15:12:14,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:14,465 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1335 transitions. [2022-01-18 15:12:14,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:14,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:14,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:14,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-01-18 15:12:14,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-01-18 15:12:14,666 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:14,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:14,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1976851467, now seen corresponding path program 207 times [2022-01-18 15:12:14,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:14,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392694130] [2022-01-18 15:12:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:14,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:14,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:14,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392694130] [2022-01-18 15:12:14,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392694130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:14,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077746891] [2022-01-18 15:12:14,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:12:14,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:14,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:14,799 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:14,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-18 15:12:14,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:12:14,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:14,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:14,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:14,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:14,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:15,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:15,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:15,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:15,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:15,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:15,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:15,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:15,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:15,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:12:15,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:15,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:12:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:15,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077746891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:15,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:15,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:15,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513494327] [2022-01-18 15:12:15,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:15,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:15,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:15,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:15,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:15,289 INFO L87 Difference]: Start difference. First operand 432 states and 1335 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:15,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:15,828 INFO L93 Difference]: Finished difference Result 711 states and 2121 transitions. [2022-01-18 15:12:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:12:15,828 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:15,829 INFO L225 Difference]: With dead ends: 711 [2022-01-18 15:12:15,829 INFO L226 Difference]: Without dead ends: 696 [2022-01-18 15:12:15,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:12:15,830 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:15,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 321 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 926 Invalid, 0 Unknown, 93 Unchecked, 0.3s Time] [2022-01-18 15:12:15,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-01-18 15:12:15,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 431. [2022-01-18 15:12:15,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.0930232558139537) internal successors, (1330), 430 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:15,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1330 transitions. [2022-01-18 15:12:15,835 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1330 transitions. Word has length 20 [2022-01-18 15:12:15,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:15,835 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1330 transitions. [2022-01-18 15:12:15,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:15,835 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1330 transitions. [2022-01-18 15:12:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:15,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:15,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:15,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-01-18 15:12:16,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:16,037 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:16,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:16,037 INFO L85 PathProgramCache]: Analyzing trace with hash -603861295, now seen corresponding path program 208 times [2022-01-18 15:12:16,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:16,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444736223] [2022-01-18 15:12:16,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:16,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:16,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:16,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444736223] [2022-01-18 15:12:16,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444736223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:16,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864923601] [2022-01-18 15:12:16,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:12:16,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:16,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:16,149 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:16,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-18 15:12:16,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:12:16,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:16,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:16,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:16,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:16,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:16,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:16,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:16,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:16,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:16,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:16,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:16,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:16,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:16,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:12:16,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:16,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:12:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:16,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864923601] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:16,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:16,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:12:16,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962620666] [2022-01-18 15:12:16,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:16,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:12:16,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:16,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:12:16,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:12:16,577 INFO L87 Difference]: Start difference. First operand 431 states and 1330 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:16,967 INFO L93 Difference]: Finished difference Result 668 states and 1998 transitions. [2022-01-18 15:12:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:16,968 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:16,968 INFO L225 Difference]: With dead ends: 668 [2022-01-18 15:12:16,968 INFO L226 Difference]: Without dead ends: 638 [2022-01-18 15:12:16,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:12:16,969 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:16,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 185 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 701 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-01-18 15:12:16,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-01-18 15:12:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 430. [2022-01-18 15:12:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.090909090909091) internal successors, (1326), 429 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1326 transitions. [2022-01-18 15:12:16,976 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1326 transitions. Word has length 20 [2022-01-18 15:12:16,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:16,976 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1326 transitions. [2022-01-18 15:12:16,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:16,976 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1326 transitions. [2022-01-18 15:12:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:16,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:16,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:16,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:17,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2022-01-18 15:12:17,191 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:17,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1515277913, now seen corresponding path program 209 times [2022-01-18 15:12:17,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:17,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199867469] [2022-01-18 15:12:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:17,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:17,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:17,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199867469] [2022-01-18 15:12:17,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199867469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:17,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280957877] [2022-01-18 15:12:17,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:12:17,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:17,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:17,326 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:17,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-18 15:12:17,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:12:17,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:17,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:17,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:17,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:17,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:17,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:17,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:17,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:17,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:17,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:17,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:17,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:17,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:17,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:17,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:17,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:17,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280957877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:17,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:17,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:17,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180708950] [2022-01-18 15:12:17,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:17,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:17,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:17,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:17,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:17,818 INFO L87 Difference]: Start difference. First operand 430 states and 1326 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:18,147 INFO L93 Difference]: Finished difference Result 679 states and 2027 transitions. [2022-01-18 15:12:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:12:18,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:18,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:18,148 INFO L225 Difference]: With dead ends: 679 [2022-01-18 15:12:18,148 INFO L226 Difference]: Without dead ends: 649 [2022-01-18 15:12:18,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:12:18,148 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:18,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 184 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 577 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-01-18 15:12:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-18 15:12:18,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 432. [2022-01-18 15:12:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.097447795823666) internal successors, (1335), 431 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1335 transitions. [2022-01-18 15:12:18,153 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1335 transitions. Word has length 20 [2022-01-18 15:12:18,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:18,153 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1335 transitions. [2022-01-18 15:12:18,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:18,154 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1335 transitions. [2022-01-18 15:12:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:18,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:18,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:18,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-01-18 15:12:18,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:18,355 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:18,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash -593575773, now seen corresponding path program 210 times [2022-01-18 15:12:18,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:18,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342064391] [2022-01-18 15:12:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:18,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:18,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:18,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342064391] [2022-01-18 15:12:18,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342064391] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:18,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283975383] [2022-01-18 15:12:18,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:12:18,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:18,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:18,520 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:18,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-18 15:12:18,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:12:18,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:18,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:18,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:18,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:18,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:18,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:18,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:18,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:18,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:18,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:18,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:18,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:19,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:19,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:19,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:19,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:19,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283975383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:19,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:19,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:19,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505967103] [2022-01-18 15:12:19,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:19,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:19,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:19,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:19,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:19,097 INFO L87 Difference]: Start difference. First operand 432 states and 1335 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:19,421 INFO L93 Difference]: Finished difference Result 664 states and 1993 transitions. [2022-01-18 15:12:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:12:19,421 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:19,422 INFO L225 Difference]: With dead ends: 664 [2022-01-18 15:12:19,422 INFO L226 Difference]: Without dead ends: 649 [2022-01-18 15:12:19,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:12:19,423 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:19,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 194 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 585 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-01-18 15:12:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-18 15:12:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 435. [2022-01-18 15:12:19,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.1013824884792625) internal successors, (1346), 434 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1346 transitions. [2022-01-18 15:12:19,428 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1346 transitions. Word has length 20 [2022-01-18 15:12:19,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:19,428 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1346 transitions. [2022-01-18 15:12:19,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:19,428 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1346 transitions. [2022-01-18 15:12:19,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:19,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:19,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:19,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-01-18 15:12:19,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-01-18 15:12:19,629 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:19,629 INFO L85 PathProgramCache]: Analyzing trace with hash 732334439, now seen corresponding path program 211 times [2022-01-18 15:12:19,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:19,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932846398] [2022-01-18 15:12:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:19,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:19,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:19,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932846398] [2022-01-18 15:12:19,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932846398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:19,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231745046] [2022-01-18 15:12:19,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:12:19,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:19,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:19,770 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:19,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-18 15:12:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:19,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:19,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:19,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:19,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:19,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:19,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:19,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:19,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:20,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:20,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:20,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:20,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:20,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:20,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:20,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:20,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231745046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:20,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:20,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:20,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742099442] [2022-01-18 15:12:20,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:20,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:20,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:20,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:20,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:20,252 INFO L87 Difference]: Start difference. First operand 435 states and 1346 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:20,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:20,548 INFO L93 Difference]: Finished difference Result 754 states and 2269 transitions. [2022-01-18 15:12:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:20,548 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:20,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:20,549 INFO L225 Difference]: With dead ends: 754 [2022-01-18 15:12:20,549 INFO L226 Difference]: Without dead ends: 724 [2022-01-18 15:12:20,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:12:20,549 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:20,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 199 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 531 Invalid, 0 Unknown, 127 Unchecked, 0.2s Time] [2022-01-18 15:12:20,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-18 15:12:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 438. [2022-01-18 15:12:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.102974828375286) internal successors, (1356), 437 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1356 transitions. [2022-01-18 15:12:20,555 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1356 transitions. Word has length 20 [2022-01-18 15:12:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:20,555 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1356 transitions. [2022-01-18 15:12:20,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1356 transitions. [2022-01-18 15:12:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:20,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:20,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:20,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:20,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:20,756 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1508657261, now seen corresponding path program 212 times [2022-01-18 15:12:20,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:20,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734619310] [2022-01-18 15:12:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:20,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:20,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:20,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734619310] [2022-01-18 15:12:20,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734619310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:20,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689262761] [2022-01-18 15:12:20,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:12:20,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:20,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:20,885 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:20,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-18 15:12:20,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:12:20,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:20,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:20,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:21,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:21,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:21,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:21,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:21,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:21,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:21,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:21,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:21,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:21,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:21,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:21,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:21,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:21,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689262761] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:21,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:21,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:21,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507001055] [2022-01-18 15:12:21,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:21,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:21,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:21,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:21,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:21,368 INFO L87 Difference]: Start difference. First operand 438 states and 1356 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:21,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:21,710 INFO L93 Difference]: Finished difference Result 682 states and 2060 transitions. [2022-01-18 15:12:21,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:12:21,710 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:21,711 INFO L225 Difference]: With dead ends: 682 [2022-01-18 15:12:21,711 INFO L226 Difference]: Without dead ends: 667 [2022-01-18 15:12:21,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:12:21,711 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:21,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 226 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 516 Invalid, 0 Unknown, 216 Unchecked, 0.2s Time] [2022-01-18 15:12:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-18 15:12:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 441. [2022-01-18 15:12:21,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.1) internal successors, (1364), 440 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:21,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1364 transitions. [2022-01-18 15:12:21,717 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1364 transitions. Word has length 20 [2022-01-18 15:12:21,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:21,717 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1364 transitions. [2022-01-18 15:12:21,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:21,717 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1364 transitions. [2022-01-18 15:12:21,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:21,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:21,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:21,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-01-18 15:12:21,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-01-18 15:12:21,918 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:21,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:21,918 INFO L85 PathProgramCache]: Analyzing trace with hash -182747049, now seen corresponding path program 213 times [2022-01-18 15:12:21,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:21,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278285042] [2022-01-18 15:12:21,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:21,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:22,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:22,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278285042] [2022-01-18 15:12:22,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278285042] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:22,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157562185] [2022-01-18 15:12:22,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:12:22,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:22,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:22,051 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:22,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-18 15:12:22,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:12:22,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:22,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:22,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:22,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:22,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:22,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:22,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:22,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:22,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:22,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:22,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:22,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:22,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:22,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:22,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:22,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:22,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157562185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:22,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:22,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:22,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288681465] [2022-01-18 15:12:22,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:22,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:22,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:22,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:22,535 INFO L87 Difference]: Start difference. First operand 441 states and 1364 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:22,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:22,898 INFO L93 Difference]: Finished difference Result 699 states and 2100 transitions. [2022-01-18 15:12:22,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:12:22,899 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:22,900 INFO L225 Difference]: With dead ends: 699 [2022-01-18 15:12:22,900 INFO L226 Difference]: Without dead ends: 669 [2022-01-18 15:12:22,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:12:22,900 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:22,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 224 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 675 Invalid, 0 Unknown, 210 Unchecked, 0.3s Time] [2022-01-18 15:12:22,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-18 15:12:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 441. [2022-01-18 15:12:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.1) internal successors, (1364), 440 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1364 transitions. [2022-01-18 15:12:22,905 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1364 transitions. Word has length 20 [2022-01-18 15:12:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:22,905 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1364 transitions. [2022-01-18 15:12:22,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1364 transitions. [2022-01-18 15:12:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:22,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:22,906 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:22,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:23,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-01-18 15:12:23,107 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:23,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1447486109, now seen corresponding path program 214 times [2022-01-18 15:12:23,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:23,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205345067] [2022-01-18 15:12:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:23,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:23,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:23,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205345067] [2022-01-18 15:12:23,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205345067] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:23,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985807612] [2022-01-18 15:12:23,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:12:23,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:23,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:23,233 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:23,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-18 15:12:23,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:12:23,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:23,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:23,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:23,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:23,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:23,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:23,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:23,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:23,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:23,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:23,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:23,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:23,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:23,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:23,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:23,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:23,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:23,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985807612] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:23,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:23,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:23,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085559441] [2022-01-18 15:12:23,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:23,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:23,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:23,733 INFO L87 Difference]: Start difference. First operand 441 states and 1364 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:23,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:23,965 INFO L93 Difference]: Finished difference Result 618 states and 1860 transitions. [2022-01-18 15:12:23,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:12:23,965 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:23,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:23,966 INFO L225 Difference]: With dead ends: 618 [2022-01-18 15:12:23,966 INFO L226 Difference]: Without dead ends: 588 [2022-01-18 15:12:23,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:12:23,966 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:23,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 184 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 417 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2022-01-18 15:12:23,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-01-18 15:12:23,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 445. [2022-01-18 15:12:23,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.108108108108108) internal successors, (1380), 444 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:23,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1380 transitions. [2022-01-18 15:12:23,971 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1380 transitions. Word has length 20 [2022-01-18 15:12:23,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:23,971 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 1380 transitions. [2022-01-18 15:12:23,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:23,971 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1380 transitions. [2022-01-18 15:12:23,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:23,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:23,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:23,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-01-18 15:12:24,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:24,172 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:24,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:24,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2034401711, now seen corresponding path program 215 times [2022-01-18 15:12:24,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:24,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644862376] [2022-01-18 15:12:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:24,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:24,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:24,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644862376] [2022-01-18 15:12:24,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644862376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:24,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179652739] [2022-01-18 15:12:24,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:12:24,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:24,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:24,300 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:24,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-18 15:12:24,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:12:24,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:24,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:24,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:24,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:24,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:24,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:24,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:24,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:24,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:24,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:24,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:24,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:24,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:24,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:24,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:24,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:24,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179652739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:24,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:24,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:24,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551986757] [2022-01-18 15:12:24,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:24,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:24,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:24,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:24,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:24,828 INFO L87 Difference]: Start difference. First operand 445 states and 1380 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:25,065 INFO L93 Difference]: Finished difference Result 636 states and 1898 transitions. [2022-01-18 15:12:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:25,066 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:25,066 INFO L225 Difference]: With dead ends: 636 [2022-01-18 15:12:25,067 INFO L226 Difference]: Without dead ends: 606 [2022-01-18 15:12:25,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:12:25,067 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:25,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 189 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 516 Invalid, 0 Unknown, 137 Unchecked, 0.2s Time] [2022-01-18 15:12:25,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-01-18 15:12:25,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 453. [2022-01-18 15:12:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.099557522123894) internal successors, (1401), 452 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1401 transitions. [2022-01-18 15:12:25,072 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1401 transitions. Word has length 20 [2022-01-18 15:12:25,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:25,072 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1401 transitions. [2022-01-18 15:12:25,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:25,072 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1401 transitions. [2022-01-18 15:12:25,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:25,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:25,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:25,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-01-18 15:12:25,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:25,275 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:25,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1359019783, now seen corresponding path program 216 times [2022-01-18 15:12:25,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:25,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428375635] [2022-01-18 15:12:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:25,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:25,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:25,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428375635] [2022-01-18 15:12:25,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428375635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:25,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512446085] [2022-01-18 15:12:25,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:12:25,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:25,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:25,392 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:25,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-18 15:12:25,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:12:25,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:25,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:25,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:25,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:25,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:25,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:25,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:25,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:25,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:25,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:25,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:25,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:25,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:25,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:25,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:25,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512446085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:25,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:25,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:25,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361754618] [2022-01-18 15:12:25,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:25,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:25,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:25,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:25,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:25,979 INFO L87 Difference]: Start difference. First operand 453 states and 1401 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:26,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:26,277 INFO L93 Difference]: Finished difference Result 603 states and 1817 transitions. [2022-01-18 15:12:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:26,278 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:26,278 INFO L225 Difference]: With dead ends: 603 [2022-01-18 15:12:26,278 INFO L226 Difference]: Without dead ends: 600 [2022-01-18 15:12:26,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:12:26,279 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:26,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 231 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 656 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-01-18 15:12:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-18 15:12:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 452. [2022-01-18 15:12:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.1019955654101996) internal successors, (1399), 451 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1399 transitions. [2022-01-18 15:12:26,284 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1399 transitions. Word has length 20 [2022-01-18 15:12:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:26,284 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1399 transitions. [2022-01-18 15:12:26,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:26,284 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1399 transitions. [2022-01-18 15:12:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:26,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:26,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:26,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-01-18 15:12:26,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-01-18 15:12:26,486 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:26,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:26,486 INFO L85 PathProgramCache]: Analyzing trace with hash -910562449, now seen corresponding path program 217 times [2022-01-18 15:12:26,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:26,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849010072] [2022-01-18 15:12:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:26,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:26,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:26,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849010072] [2022-01-18 15:12:26,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849010072] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:26,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779328493] [2022-01-18 15:12:26,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:12:26,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:26,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:26,602 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:26,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-18 15:12:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:26,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:26,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:26,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:26,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:26,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:26,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:26,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:26,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:26,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:27,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:27,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:27,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:27,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:27,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:27,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:27,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779328493] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:27,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:27,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:27,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987074853] [2022-01-18 15:12:27,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:27,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:27,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:27,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:27,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:27,196 INFO L87 Difference]: Start difference. First operand 452 states and 1399 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:27,445 INFO L93 Difference]: Finished difference Result 607 states and 1824 transitions. [2022-01-18 15:12:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:27,446 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:27,446 INFO L225 Difference]: With dead ends: 607 [2022-01-18 15:12:27,446 INFO L226 Difference]: Without dead ends: 600 [2022-01-18 15:12:27,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:12:27,447 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:27,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 179 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 561 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-01-18 15:12:27,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-18 15:12:27,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 441. [2022-01-18 15:12:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.109090909090909) internal successors, (1368), 440 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1368 transitions. [2022-01-18 15:12:27,452 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1368 transitions. Word has length 20 [2022-01-18 15:12:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:27,452 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1368 transitions. [2022-01-18 15:12:27,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1368 transitions. [2022-01-18 15:12:27,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:27,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:27,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:27,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-01-18 15:12:27,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-01-18 15:12:27,653 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:27,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:27,653 INFO L85 PathProgramCache]: Analyzing trace with hash -710863579, now seen corresponding path program 218 times [2022-01-18 15:12:27,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:27,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625039692] [2022-01-18 15:12:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:27,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:27,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:27,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625039692] [2022-01-18 15:12:27,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625039692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:27,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805753513] [2022-01-18 15:12:27,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:12:27,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:27,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:27,783 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:27,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-18 15:12:27,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:12:27,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:27,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:27,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:27,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:27,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:27,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:27,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:27,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:27,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:28,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:28,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:28,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:28,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:28,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:28,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:28,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:28,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805753513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:28,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:28,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:28,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12238667] [2022-01-18 15:12:28,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:28,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:28,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:28,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:28,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:28,309 INFO L87 Difference]: Start difference. First operand 441 states and 1368 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:28,566 INFO L93 Difference]: Finished difference Result 594 states and 1800 transitions. [2022-01-18 15:12:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:12:28,567 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:28,568 INFO L225 Difference]: With dead ends: 594 [2022-01-18 15:12:28,568 INFO L226 Difference]: Without dead ends: 579 [2022-01-18 15:12:28,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:12:28,568 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:28,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 168 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 448 Invalid, 0 Unknown, 127 Unchecked, 0.2s Time] [2022-01-18 15:12:28,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-01-18 15:12:28,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 443. [2022-01-18 15:12:28,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.1131221719457014) internal successors, (1376), 442 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:28,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1376 transitions. [2022-01-18 15:12:28,573 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1376 transitions. Word has length 20 [2022-01-18 15:12:28,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:28,573 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1376 transitions. [2022-01-18 15:12:28,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:28,573 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1376 transitions. [2022-01-18 15:12:28,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:28,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:28,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:28,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-01-18 15:12:28,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2022-01-18 15:12:28,774 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:28,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:28,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1028904089, now seen corresponding path program 219 times [2022-01-18 15:12:28,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:28,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266885058] [2022-01-18 15:12:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:28,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:28,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:28,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266885058] [2022-01-18 15:12:28,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266885058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:28,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423620497] [2022-01-18 15:12:28,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:12:28,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:28,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:28,903 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:28,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-18 15:12:28,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:12:28,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:28,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:28,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:28,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:28,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:29,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:29,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:29,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:29,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:29,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:29,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:29,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:29,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:29,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:29,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:29,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:29,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423620497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:29,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:29,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:29,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167553108] [2022-01-18 15:12:29,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:29,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:29,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:29,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:29,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:29,466 INFO L87 Difference]: Start difference. First operand 443 states and 1376 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:29,760 INFO L93 Difference]: Finished difference Result 593 states and 1791 transitions. [2022-01-18 15:12:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:12:29,760 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:29,761 INFO L225 Difference]: With dead ends: 593 [2022-01-18 15:12:29,761 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 15:12:29,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:12:29,761 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:29,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 175 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 604 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-01-18 15:12:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 15:12:29,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 444. [2022-01-18 15:12:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 3.1128668171557563) internal successors, (1379), 443 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1379 transitions. [2022-01-18 15:12:29,766 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1379 transitions. Word has length 20 [2022-01-18 15:12:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:29,766 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 1379 transitions. [2022-01-18 15:12:29,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1379 transitions. [2022-01-18 15:12:29,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:29,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:29,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:29,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:29,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:29,967 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:29,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:29,968 INFO L85 PathProgramCache]: Analyzing trace with hash -441988487, now seen corresponding path program 220 times [2022-01-18 15:12:29,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:29,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606686804] [2022-01-18 15:12:29,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:29,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:30,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:30,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606686804] [2022-01-18 15:12:30,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606686804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:30,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062855089] [2022-01-18 15:12:30,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:12:30,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:30,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:30,094 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:30,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-18 15:12:30,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:12:30,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:30,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:30,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:30,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:30,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:30,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:30,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:30,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:30,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:30,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:30,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:30,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:30,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:30,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:30,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:30,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:30,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062855089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:30,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:30,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:30,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969447507] [2022-01-18 15:12:30,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:30,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:30,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:30,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:30,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:30,695 INFO L87 Difference]: Start difference. First operand 444 states and 1379 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:30,921 INFO L93 Difference]: Finished difference Result 637 states and 1890 transitions. [2022-01-18 15:12:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:12:30,921 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:30,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:30,922 INFO L225 Difference]: With dead ends: 637 [2022-01-18 15:12:30,922 INFO L226 Difference]: Without dead ends: 607 [2022-01-18 15:12:30,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:12:30,922 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:30,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 151 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 480 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2022-01-18 15:12:30,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-18 15:12:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 437. [2022-01-18 15:12:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.1009174311926606) internal successors, (1352), 436 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1352 transitions. [2022-01-18 15:12:30,928 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1352 transitions. Word has length 20 [2022-01-18 15:12:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:30,928 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1352 transitions. [2022-01-18 15:12:30,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:30,928 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1352 transitions. [2022-01-18 15:12:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:30,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:30,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:30,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:31,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2022-01-18 15:12:31,129 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:31,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:31,130 INFO L85 PathProgramCache]: Analyzing trace with hash -351344739, now seen corresponding path program 221 times [2022-01-18 15:12:31,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:31,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819395293] [2022-01-18 15:12:31,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:31,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:31,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:31,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819395293] [2022-01-18 15:12:31,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819395293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:31,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125251797] [2022-01-18 15:12:31,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:12:31,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:31,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:31,265 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:31,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-18 15:12:31,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:12:31,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:31,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:31,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:31,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:31,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:31,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:31,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:31,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:31,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:31,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:31,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:31,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:31,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:31,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:31,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:31,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:31,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125251797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:31,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:31,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:31,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662816882] [2022-01-18 15:12:31,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:31,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:31,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:31,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:31,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:31,752 INFO L87 Difference]: Start difference. First operand 437 states and 1352 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:31,939 INFO L93 Difference]: Finished difference Result 583 states and 1769 transitions. [2022-01-18 15:12:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:12:31,939 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:31,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:31,940 INFO L225 Difference]: With dead ends: 583 [2022-01-18 15:12:31,940 INFO L226 Difference]: Without dead ends: 568 [2022-01-18 15:12:31,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:12:31,941 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:31,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 189 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 370 Invalid, 0 Unknown, 119 Unchecked, 0.1s Time] [2022-01-18 15:12:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-18 15:12:31,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 439. [2022-01-18 15:12:31,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.1073059360730593) internal successors, (1361), 438 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1361 transitions. [2022-01-18 15:12:31,948 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1361 transitions. Word has length 20 [2022-01-18 15:12:31,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:31,948 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1361 transitions. [2022-01-18 15:12:31,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:31,948 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1361 transitions. [2022-01-18 15:12:31,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:31,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:31,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:31,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:32,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-01-18 15:12:32,163 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:32,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:32,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1128228995, now seen corresponding path program 222 times [2022-01-18 15:12:32,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:32,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708838505] [2022-01-18 15:12:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:32,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:32,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:32,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708838505] [2022-01-18 15:12:32,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708838505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:32,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759474471] [2022-01-18 15:12:32,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:12:32,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:32,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:32,302 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:32,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-18 15:12:32,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:12:32,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:32,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:32,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:32,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:32,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:32,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:32,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:32,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:32,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:32,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:32,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:32,743 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:32,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:32,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:32,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:32,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759474471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:32,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:32,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:32,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260262590] [2022-01-18 15:12:32,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:32,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:32,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:32,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:32,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:32,791 INFO L87 Difference]: Start difference. First operand 439 states and 1361 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:33,005 INFO L93 Difference]: Finished difference Result 602 states and 1817 transitions. [2022-01-18 15:12:33,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:33,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:33,007 INFO L225 Difference]: With dead ends: 602 [2022-01-18 15:12:33,007 INFO L226 Difference]: Without dead ends: 587 [2022-01-18 15:12:33,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:12:33,007 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:33,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 192 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 466 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-01-18 15:12:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-01-18 15:12:33,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 439. [2022-01-18 15:12:33,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.1073059360730593) internal successors, (1361), 438 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:33,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1361 transitions. [2022-01-18 15:12:33,012 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1361 transitions. Word has length 20 [2022-01-18 15:12:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:33,012 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1361 transitions. [2022-01-18 15:12:33,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1361 transitions. [2022-01-18 15:12:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:33,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:33,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:33,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-01-18 15:12:33,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-01-18 15:12:33,213 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:33,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:33,214 INFO L85 PathProgramCache]: Analyzing trace with hash 244761177, now seen corresponding path program 223 times [2022-01-18 15:12:33,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:33,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56875066] [2022-01-18 15:12:33,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:33,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:33,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:33,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56875066] [2022-01-18 15:12:33,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56875066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:33,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993734437] [2022-01-18 15:12:33,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:12:33,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:33,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:33,350 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:33,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-18 15:12:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:33,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:33,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:33,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:33,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:33,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:33,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:33,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:33,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:33,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:33,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:33,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:33,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:33,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:33,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:33,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:33,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993734437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:33,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:33,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:33,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429235284] [2022-01-18 15:12:33,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:33,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:33,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:33,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:33,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:33,829 INFO L87 Difference]: Start difference. First operand 439 states and 1361 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:34,224 INFO L93 Difference]: Finished difference Result 627 states and 1898 transitions. [2022-01-18 15:12:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:12:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:34,225 INFO L225 Difference]: With dead ends: 627 [2022-01-18 15:12:34,225 INFO L226 Difference]: Without dead ends: 612 [2022-01-18 15:12:34,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:12:34,225 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:34,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 183 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 616 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-01-18 15:12:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-01-18 15:12:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 439. [2022-01-18 15:12:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.1073059360730593) internal successors, (1361), 438 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1361 transitions. [2022-01-18 15:12:34,230 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1361 transitions. Word has length 20 [2022-01-18 15:12:34,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:34,231 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1361 transitions. [2022-01-18 15:12:34,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1361 transitions. [2022-01-18 15:12:34,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:34,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:34,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:34,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-01-18 15:12:34,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-01-18 15:12:34,432 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:34,432 INFO L85 PathProgramCache]: Analyzing trace with hash 770261817, now seen corresponding path program 224 times [2022-01-18 15:12:34,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:34,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186780920] [2022-01-18 15:12:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:34,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:34,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:34,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186780920] [2022-01-18 15:12:34,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186780920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:34,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740644343] [2022-01-18 15:12:34,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:12:34,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:34,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:34,567 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:34,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-18 15:12:34,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:12:34,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:34,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:34,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:34,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:34,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:34,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:34,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:34,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:34,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:34,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:34,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:34,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:35,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:35,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:35,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:35,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:35,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740644343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:35,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:35,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:35,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111981902] [2022-01-18 15:12:35,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:35,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:35,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:35,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:35,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:35,062 INFO L87 Difference]: Start difference. First operand 439 states and 1361 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:35,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:35,302 INFO L93 Difference]: Finished difference Result 595 states and 1795 transitions. [2022-01-18 15:12:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:35,302 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:35,303 INFO L225 Difference]: With dead ends: 595 [2022-01-18 15:12:35,303 INFO L226 Difference]: Without dead ends: 580 [2022-01-18 15:12:35,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:12:35,303 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:35,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 237 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 548 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-01-18 15:12:35,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-18 15:12:35,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 439. [2022-01-18 15:12:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.1073059360730593) internal successors, (1361), 438 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1361 transitions. [2022-01-18 15:12:35,308 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1361 transitions. Word has length 20 [2022-01-18 15:12:35,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:35,308 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1361 transitions. [2022-01-18 15:12:35,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:35,308 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1361 transitions. [2022-01-18 15:12:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:35,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:35,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:35,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-01-18 15:12:35,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:35,509 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1759322365, now seen corresponding path program 225 times [2022-01-18 15:12:35,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:35,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388748705] [2022-01-18 15:12:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:35,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:35,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:35,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388748705] [2022-01-18 15:12:35,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388748705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:35,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687410885] [2022-01-18 15:12:35,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:12:35,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:35,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:35,653 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:35,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-18 15:12:35,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:12:35,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:35,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:35,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:35,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:35,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:35,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:35,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:35,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:35,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:35,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:36,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:36,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:36,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:36,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:36,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:36,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:36,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687410885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:36,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:36,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:36,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431060322] [2022-01-18 15:12:36,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:36,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:36,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:36,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:36,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:36,128 INFO L87 Difference]: Start difference. First operand 439 states and 1361 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:36,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:36,470 INFO L93 Difference]: Finished difference Result 635 states and 1916 transitions. [2022-01-18 15:12:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:12:36,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:36,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:36,471 INFO L225 Difference]: With dead ends: 635 [2022-01-18 15:12:36,471 INFO L226 Difference]: Without dead ends: 620 [2022-01-18 15:12:36,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:12:36,472 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:36,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 174 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 515 Invalid, 0 Unknown, 175 Unchecked, 0.2s Time] [2022-01-18 15:12:36,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-01-18 15:12:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 438. [2022-01-18 15:12:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.102974828375286) internal successors, (1356), 437 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:36,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1356 transitions. [2022-01-18 15:12:36,477 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1356 transitions. Word has length 20 [2022-01-18 15:12:36,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:36,477 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1356 transitions. [2022-01-18 15:12:36,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:36,477 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1356 transitions. [2022-01-18 15:12:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:36,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:36,478 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:36,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-01-18 15:12:36,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:36,678 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:36,678 INFO L85 PathProgramCache]: Analyzing trace with hash -247834585, now seen corresponding path program 226 times [2022-01-18 15:12:36,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:36,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294250235] [2022-01-18 15:12:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:36,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:36,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:36,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294250235] [2022-01-18 15:12:36,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294250235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:36,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541416554] [2022-01-18 15:12:36,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:12:36,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:36,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:36,807 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:36,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-18 15:12:36,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:12:36,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:36,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:36,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:36,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:36,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:36,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:36,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:36,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:36,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:37,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:37,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:37,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:37,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:37,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:37,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:37,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:37,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541416554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:37,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:37,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:37,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026589781] [2022-01-18 15:12:37,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:37,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:37,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:37,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:37,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:37,276 INFO L87 Difference]: Start difference. First operand 438 states and 1356 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:37,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:37,532 INFO L93 Difference]: Finished difference Result 581 states and 1762 transitions. [2022-01-18 15:12:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:12:37,532 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:37,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:37,533 INFO L225 Difference]: With dead ends: 581 [2022-01-18 15:12:37,533 INFO L226 Difference]: Without dead ends: 566 [2022-01-18 15:12:37,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:12:37,533 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:37,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 169 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 467 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-01-18 15:12:37,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-18 15:12:37,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 439. [2022-01-18 15:12:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.1073059360730593) internal successors, (1361), 438 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1361 transitions. [2022-01-18 15:12:37,538 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1361 transitions. Word has length 20 [2022-01-18 15:12:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:37,538 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1361 transitions. [2022-01-18 15:12:37,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1361 transitions. [2022-01-18 15:12:37,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:37,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:37,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:37,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-01-18 15:12:37,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-01-18 15:12:37,739 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:37,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:37,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1771641669, now seen corresponding path program 227 times [2022-01-18 15:12:37,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:37,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979878162] [2022-01-18 15:12:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:37,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:37,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:37,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979878162] [2022-01-18 15:12:37,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979878162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:37,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630079051] [2022-01-18 15:12:37,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:12:37,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:37,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:37,868 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:37,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-18 15:12:37,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:12:37,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:37,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:37,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:37,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:37,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:38,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:38,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:38,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:38,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:38,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:38,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:38,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:38,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:38,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:38,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:38,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:38,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630079051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:38,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:38,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:38,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199073715] [2022-01-18 15:12:38,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:38,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:38,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:38,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:38,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:38,392 INFO L87 Difference]: Start difference. First operand 439 states and 1361 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:38,686 INFO L93 Difference]: Finished difference Result 592 states and 1793 transitions. [2022-01-18 15:12:38,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:12:38,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:38,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:38,687 INFO L225 Difference]: With dead ends: 592 [2022-01-18 15:12:38,687 INFO L226 Difference]: Without dead ends: 577 [2022-01-18 15:12:38,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:12:38,688 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:38,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 218 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 597 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-01-18 15:12:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-01-18 15:12:38,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 441. [2022-01-18 15:12:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.1113636363636363) internal successors, (1369), 440 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:38,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1369 transitions. [2022-01-18 15:12:38,693 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1369 transitions. Word has length 20 [2022-01-18 15:12:38,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:38,693 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1369 transitions. [2022-01-18 15:12:38,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:38,693 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1369 transitions. [2022-01-18 15:12:38,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:38,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:38,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:38,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:38,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-01-18 15:12:38,894 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:38,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:38,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2089682179, now seen corresponding path program 228 times [2022-01-18 15:12:38,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:38,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483622377] [2022-01-18 15:12:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:38,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:39,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:39,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483622377] [2022-01-18 15:12:39,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483622377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:39,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462910185] [2022-01-18 15:12:39,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:12:39,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:39,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:39,024 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:39,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-18 15:12:39,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:12:39,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:39,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:39,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:39,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:39,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:39,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:39,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:39,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:39,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:39,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:39,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:39,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:39,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:39,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:39,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:39,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:39,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462910185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:39,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:39,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:39,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578357622] [2022-01-18 15:12:39,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:39,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:39,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:39,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:39,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:39,579 INFO L87 Difference]: Start difference. First operand 441 states and 1369 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:39,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:39,857 INFO L93 Difference]: Finished difference Result 591 states and 1784 transitions. [2022-01-18 15:12:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:12:39,857 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:39,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:39,858 INFO L225 Difference]: With dead ends: 591 [2022-01-18 15:12:39,858 INFO L226 Difference]: Without dead ends: 584 [2022-01-18 15:12:39,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:12:39,858 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:39,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 178 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 554 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-01-18 15:12:39,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-18 15:12:39,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 442. [2022-01-18 15:12:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.111111111111111) internal successors, (1372), 441 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1372 transitions. [2022-01-18 15:12:39,863 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1372 transitions. Word has length 20 [2022-01-18 15:12:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:39,863 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1372 transitions. [2022-01-18 15:12:39,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1372 transitions. [2022-01-18 15:12:39,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:39,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:39,864 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:39,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-01-18 15:12:40,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:40,064 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:40,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:40,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1502766577, now seen corresponding path program 229 times [2022-01-18 15:12:40,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:40,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696325602] [2022-01-18 15:12:40,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:40,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:40,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:40,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696325602] [2022-01-18 15:12:40,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696325602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:40,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373823968] [2022-01-18 15:12:40,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:12:40,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:40,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:40,188 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:40,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-01-18 15:12:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:40,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:40,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:40,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:40,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:40,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:40,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:40,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:40,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:40,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:40,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:40,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:40,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:40,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:40,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:40,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:40,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373823968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:40,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:40,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:40,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069842773] [2022-01-18 15:12:40,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:40,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:40,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:40,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:40,793 INFO L87 Difference]: Start difference. First operand 442 states and 1372 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:41,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:41,029 INFO L93 Difference]: Finished difference Result 635 states and 1892 transitions. [2022-01-18 15:12:41,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:12:41,029 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:41,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:41,030 INFO L225 Difference]: With dead ends: 635 [2022-01-18 15:12:41,030 INFO L226 Difference]: Without dead ends: 605 [2022-01-18 15:12:41,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:12:41,030 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:41,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 235 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 495 Invalid, 0 Unknown, 181 Unchecked, 0.2s Time] [2022-01-18 15:12:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-18 15:12:41,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 450. [2022-01-18 15:12:41,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.1024498886414253) internal successors, (1393), 449 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1393 transitions. [2022-01-18 15:12:41,035 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1393 transitions. Word has length 20 [2022-01-18 15:12:41,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:41,036 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 1393 transitions. [2022-01-18 15:12:41,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:41,036 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1393 transitions. [2022-01-18 15:12:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:41,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:41,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:41,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-01-18 15:12:41,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:41,237 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:41,237 INFO L85 PathProgramCache]: Analyzing trace with hash 2116818791, now seen corresponding path program 230 times [2022-01-18 15:12:41,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:41,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081534190] [2022-01-18 15:12:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:41,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:41,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:41,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081534190] [2022-01-18 15:12:41,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081534190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:41,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504186969] [2022-01-18 15:12:41,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:12:41,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:41,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:41,358 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:41,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-01-18 15:12:41,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:12:41,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:41,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:41,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:41,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:41,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:41,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:41,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:41,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:41,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:41,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:41,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:41,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:41,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:41,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:41,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:41,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:42,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504186969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:42,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:42,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:42,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770809276] [2022-01-18 15:12:42,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:42,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:42,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:42,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:42,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:42,036 INFO L87 Difference]: Start difference. First operand 450 states and 1393 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:42,239 INFO L93 Difference]: Finished difference Result 608 states and 1821 transitions. [2022-01-18 15:12:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:12:42,240 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:42,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:42,240 INFO L225 Difference]: With dead ends: 608 [2022-01-18 15:12:42,240 INFO L226 Difference]: Without dead ends: 602 [2022-01-18 15:12:42,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:12:42,241 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:42,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 165 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 408 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-01-18 15:12:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-01-18 15:12:42,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 438. [2022-01-18 15:12:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.102974828375286) internal successors, (1356), 437 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1356 transitions. [2022-01-18 15:12:42,246 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1356 transitions. Word has length 20 [2022-01-18 15:12:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:42,246 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1356 transitions. [2022-01-18 15:12:42,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1356 transitions. [2022-01-18 15:12:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:42,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:42,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:42,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:42,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:42,447 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:42,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:42,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1412276849, now seen corresponding path program 231 times [2022-01-18 15:12:42,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:42,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006528667] [2022-01-18 15:12:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:42,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:42,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:42,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006528667] [2022-01-18 15:12:42,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006528667] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578676747] [2022-01-18 15:12:42,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:12:42,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:42,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:42,566 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:42,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-01-18 15:12:42,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:12:42,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:42,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:42,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:42,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:42,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:42,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:42,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:42,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:42,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:42,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:42,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:42,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:42,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:42,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:42,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:42,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:43,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578676747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:43,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:43,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:12:43,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98047636] [2022-01-18 15:12:43,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:43,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:12:43,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:43,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:12:43,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:12:43,039 INFO L87 Difference]: Start difference. First operand 438 states and 1356 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:43,362 INFO L93 Difference]: Finished difference Result 597 states and 1811 transitions. [2022-01-18 15:12:43,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:43,362 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:43,363 INFO L225 Difference]: With dead ends: 597 [2022-01-18 15:12:43,363 INFO L226 Difference]: Without dead ends: 582 [2022-01-18 15:12:43,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:12:43,363 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:43,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 210 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 692 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-01-18 15:12:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-18 15:12:43,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 440. [2022-01-18 15:12:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.1002277904328017) internal successors, (1361), 439 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1361 transitions. [2022-01-18 15:12:43,368 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1361 transitions. Word has length 20 [2022-01-18 15:12:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:43,368 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1361 transitions. [2022-01-18 15:12:43,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1361 transitions. [2022-01-18 15:12:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:43,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:43,369 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:43,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-01-18 15:12:43,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:43,569 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:43,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:43,570 INFO L85 PathProgramCache]: Analyzing trace with hash -423216301, now seen corresponding path program 232 times [2022-01-18 15:12:43,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:43,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163094639] [2022-01-18 15:12:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:43,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:43,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:43,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163094639] [2022-01-18 15:12:43,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163094639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:43,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11490169] [2022-01-18 15:12:43,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:12:43,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:43,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:43,678 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:43,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-01-18 15:12:43,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:12:43,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:43,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:43,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:43,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:43,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:43,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:43,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:43,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:43,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:43,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:44,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:44,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:44,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:44,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:44,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:44,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:44,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11490169] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:44,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:44,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:12:44,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897308838] [2022-01-18 15:12:44,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:44,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:12:44,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:44,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:12:44,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:12:44,133 INFO L87 Difference]: Start difference. First operand 440 states and 1361 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:44,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:44,390 INFO L93 Difference]: Finished difference Result 591 states and 1796 transitions. [2022-01-18 15:12:44,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:12:44,390 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:44,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:44,391 INFO L225 Difference]: With dead ends: 591 [2022-01-18 15:12:44,391 INFO L226 Difference]: Without dead ends: 576 [2022-01-18 15:12:44,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:12:44,392 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:44,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 146 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 508 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-01-18 15:12:44,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-18 15:12:44,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 440. [2022-01-18 15:12:44,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.1002277904328017) internal successors, (1361), 439 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1361 transitions. [2022-01-18 15:12:44,397 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1361 transitions. Word has length 20 [2022-01-18 15:12:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:44,397 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1361 transitions. [2022-01-18 15:12:44,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1361 transitions. [2022-01-18 15:12:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:44,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:44,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:44,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-01-18 15:12:44,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-01-18 15:12:44,598 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:44,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:44,598 INFO L85 PathProgramCache]: Analyzing trace with hash -577653819, now seen corresponding path program 233 times [2022-01-18 15:12:44,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:44,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267713353] [2022-01-18 15:12:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:44,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:44,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:44,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267713353] [2022-01-18 15:12:44,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267713353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:44,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927039513] [2022-01-18 15:12:44,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:12:44,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:44,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:44,722 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:44,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-01-18 15:12:44,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:12:44,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:44,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:44,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:44,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:44,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:44,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:44,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:44,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:44,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:44,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:45,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:45,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:45,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:45,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:45,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:45,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:45,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927039513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:45,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:45,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:12:45,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356781432] [2022-01-18 15:12:45,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:45,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:12:45,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:45,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:12:45,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:12:45,183 INFO L87 Difference]: Start difference. First operand 440 states and 1361 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:45,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:45,446 INFO L93 Difference]: Finished difference Result 549 states and 1672 transitions. [2022-01-18 15:12:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:12:45,447 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:45,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:45,447 INFO L225 Difference]: With dead ends: 549 [2022-01-18 15:12:45,447 INFO L226 Difference]: Without dead ends: 534 [2022-01-18 15:12:45,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:12:45,448 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:45,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 190 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 624 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-01-18 15:12:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-18 15:12:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 442. [2022-01-18 15:12:45,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.1020408163265305) internal successors, (1368), 441 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1368 transitions. [2022-01-18 15:12:45,453 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1368 transitions. Word has length 20 [2022-01-18 15:12:45,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:45,453 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1368 transitions. [2022-01-18 15:12:45,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:45,453 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1368 transitions. [2022-01-18 15:12:45,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:45,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:45,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:45,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-01-18 15:12:45,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:45,654 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:45,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:45,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1458092879, now seen corresponding path program 234 times [2022-01-18 15:12:45,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:45,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537028736] [2022-01-18 15:12:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:45,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:45,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:45,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537028736] [2022-01-18 15:12:45,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537028736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:45,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532072639] [2022-01-18 15:12:45,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:12:45,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:45,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:45,796 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:45,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-01-18 15:12:45,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:12:45,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:45,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:45,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:45,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:45,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:46,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:46,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:46,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:46,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:46,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:46,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:46,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:46,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:46,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:46,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:46,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:46,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532072639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:46,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:46,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:46,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365063887] [2022-01-18 15:12:46,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:46,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:46,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:46,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:46,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:46,340 INFO L87 Difference]: Start difference. First operand 442 states and 1368 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:46,569 INFO L93 Difference]: Finished difference Result 606 states and 1826 transitions. [2022-01-18 15:12:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:46,569 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:46,570 INFO L225 Difference]: With dead ends: 606 [2022-01-18 15:12:46,570 INFO L226 Difference]: Without dead ends: 591 [2022-01-18 15:12:46,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:12:46,570 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:46,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 159 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 477 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-01-18 15:12:46,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-01-18 15:12:46,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 446. [2022-01-18 15:12:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.096629213483146) internal successors, (1378), 445 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1378 transitions. [2022-01-18 15:12:46,576 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1378 transitions. Word has length 20 [2022-01-18 15:12:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:46,576 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 1378 transitions. [2022-01-18 15:12:46,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1378 transitions. [2022-01-18 15:12:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:46,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:46,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:46,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:46,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-01-18 15:12:46,779 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:46,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash -82878929, now seen corresponding path program 235 times [2022-01-18 15:12:46,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:46,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572051142] [2022-01-18 15:12:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:46,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:46,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:46,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572051142] [2022-01-18 15:12:46,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572051142] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:46,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075888085] [2022-01-18 15:12:46,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:12:46,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:46,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:46,938 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:46,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-01-18 15:12:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:46,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:46,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:47,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:47,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:47,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:47,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:47,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:47,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:47,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:47,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:47,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:47,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:47,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:47,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:47,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:47,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075888085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:47,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:47,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:47,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495777253] [2022-01-18 15:12:47,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:47,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:47,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:47,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:47,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:47,518 INFO L87 Difference]: Start difference. First operand 446 states and 1378 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:47,759 INFO L93 Difference]: Finished difference Result 604 states and 1818 transitions. [2022-01-18 15:12:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:47,759 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:47,760 INFO L225 Difference]: With dead ends: 604 [2022-01-18 15:12:47,760 INFO L226 Difference]: Without dead ends: 597 [2022-01-18 15:12:47,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:12:47,760 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:47,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 162 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 514 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-01-18 15:12:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-01-18 15:12:47,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 448. [2022-01-18 15:12:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.0917225950783) internal successors, (1382), 447 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1382 transitions. [2022-01-18 15:12:47,765 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1382 transitions. Word has length 20 [2022-01-18 15:12:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:47,765 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 1382 transitions. [2022-01-18 15:12:47,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:47,766 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1382 transitions. [2022-01-18 15:12:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:47,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:47,766 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:47,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-01-18 15:12:47,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-01-18 15:12:47,967 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:47,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:47,967 INFO L85 PathProgramCache]: Analyzing trace with hash -758260857, now seen corresponding path program 236 times [2022-01-18 15:12:47,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:47,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131060207] [2022-01-18 15:12:47,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:47,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:48,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:48,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131060207] [2022-01-18 15:12:48,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131060207] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:48,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454471167] [2022-01-18 15:12:48,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:12:48,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:48,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:48,088 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:48,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-01-18 15:12:48,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:12:48,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:48,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:48,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:48,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:48,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:48,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:48,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:48,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:12:48,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:12:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:48,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:48,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:48,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:48,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:48,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:12:48,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:48,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:48,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454471167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:48,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:48,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:48,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419361346] [2022-01-18 15:12:48,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:48,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:48,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:48,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:48,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:48,691 INFO L87 Difference]: Start difference. First operand 448 states and 1382 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:48,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:48,951 INFO L93 Difference]: Finished difference Result 599 states and 1807 transitions. [2022-01-18 15:12:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:48,952 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:48,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:48,952 INFO L225 Difference]: With dead ends: 599 [2022-01-18 15:12:48,952 INFO L226 Difference]: Without dead ends: 596 [2022-01-18 15:12:48,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:12:48,953 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:48,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 193 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 577 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-01-18 15:12:48,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-01-18 15:12:48,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 436. [2022-01-18 15:12:48,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.1011494252873564) internal successors, (1349), 435 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1349 transitions. [2022-01-18 15:12:48,958 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1349 transitions. Word has length 20 [2022-01-18 15:12:48,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:48,958 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1349 transitions. [2022-01-18 15:12:48,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1349 transitions. [2022-01-18 15:12:48,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:48,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:48,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:48,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-01-18 15:12:49,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2022-01-18 15:12:49,159 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:49,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1572818233, now seen corresponding path program 237 times [2022-01-18 15:12:49,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:49,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58700696] [2022-01-18 15:12:49,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:49,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:49,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:49,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58700696] [2022-01-18 15:12:49,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58700696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:49,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150170653] [2022-01-18 15:12:49,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:12:49,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:49,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:49,254 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:49,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-01-18 15:12:49,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:12:49,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:49,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:49,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:49,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:49,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:49,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:49,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:49,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:49,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:49,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:49,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:49,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:49,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150170653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:49,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:49,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:12:49,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191928680] [2022-01-18 15:12:49,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:49,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:12:49,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:49,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:12:49,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:12:49,643 INFO L87 Difference]: Start difference. First operand 436 states and 1349 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:50,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:50,008 INFO L93 Difference]: Finished difference Result 657 states and 1984 transitions. [2022-01-18 15:12:50,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:12:50,009 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:50,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:50,010 INFO L225 Difference]: With dead ends: 657 [2022-01-18 15:12:50,010 INFO L226 Difference]: Without dead ends: 627 [2022-01-18 15:12:50,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:12:50,010 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:50,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 180 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:12:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-01-18 15:12:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 448. [2022-01-18 15:12:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 3.102908277404922) internal successors, (1387), 447 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1387 transitions. [2022-01-18 15:12:50,015 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1387 transitions. Word has length 20 [2022-01-18 15:12:50,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:50,015 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 1387 transitions. [2022-01-18 15:12:50,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1387 transitions. [2022-01-18 15:12:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:50,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:50,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:50,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:50,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:50,216 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:50,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash -474536711, now seen corresponding path program 238 times [2022-01-18 15:12:50,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:50,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126189482] [2022-01-18 15:12:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:50,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:50,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:50,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126189482] [2022-01-18 15:12:50,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126189482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:50,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052699852] [2022-01-18 15:12:50,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:12:50,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:50,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:50,313 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:50,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-01-18 15:12:50,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:12:50,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:50,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:50,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:50,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:50,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:50,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:50,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:50,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:50,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:50,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:50,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:50,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:50,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052699852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:50,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:50,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:12:50,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931416683] [2022-01-18 15:12:50,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:50,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:12:50,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:50,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:12:50,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:12:50,707 INFO L87 Difference]: Start difference. First operand 448 states and 1387 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:51,083 INFO L93 Difference]: Finished difference Result 675 states and 2027 transitions. [2022-01-18 15:12:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:12:51,083 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:51,084 INFO L225 Difference]: With dead ends: 675 [2022-01-18 15:12:51,084 INFO L226 Difference]: Without dead ends: 645 [2022-01-18 15:12:51,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:12:51,084 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:51,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 196 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:12:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-18 15:12:51,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 447. [2022-01-18 15:12:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.098654708520179) internal successors, (1382), 446 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1382 transitions. [2022-01-18 15:12:51,089 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1382 transitions. Word has length 20 [2022-01-18 15:12:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:51,090 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 1382 transitions. [2022-01-18 15:12:51,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1382 transitions. [2022-01-18 15:12:51,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:51,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:51,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:51,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-01-18 15:12:51,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:51,291 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:51,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:51,291 INFO L85 PathProgramCache]: Analyzing trace with hash 240614959, now seen corresponding path program 239 times [2022-01-18 15:12:51,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:51,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651788344] [2022-01-18 15:12:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:51,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:51,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:51,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651788344] [2022-01-18 15:12:51,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651788344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:51,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762863283] [2022-01-18 15:12:51,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:12:51,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:51,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:51,415 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:51,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-01-18 15:12:51,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:12:51,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:51,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:12:51,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:51,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:51,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:51,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:51,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:51,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-18 15:12:51,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:51,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:12:51,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:51,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:12:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:51,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762863283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:51,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:51,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:12:51,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481916385] [2022-01-18 15:12:51,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:51,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:12:51,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:51,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:12:51,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:12:51,916 INFO L87 Difference]: Start difference. First operand 447 states and 1382 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:52,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:52,572 INFO L93 Difference]: Finished difference Result 741 states and 2236 transitions. [2022-01-18 15:12:52,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:12:52,572 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:52,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:52,573 INFO L225 Difference]: With dead ends: 741 [2022-01-18 15:12:52,573 INFO L226 Difference]: Without dead ends: 696 [2022-01-18 15:12:52,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:12:52,573 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 87 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:52,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 274 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:12:52,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-01-18 15:12:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 455. [2022-01-18 15:12:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.1233480176211454) internal successors, (1418), 454 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1418 transitions. [2022-01-18 15:12:52,580 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1418 transitions. Word has length 20 [2022-01-18 15:12:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:52,580 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1418 transitions. [2022-01-18 15:12:52,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1418 transitions. [2022-01-18 15:12:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:52,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:52,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:52,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-01-18 15:12:52,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:52,781 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:52,781 INFO L85 PathProgramCache]: Analyzing trace with hash 317390009, now seen corresponding path program 240 times [2022-01-18 15:12:52,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:52,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095630606] [2022-01-18 15:12:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:52,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:52,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:52,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095630606] [2022-01-18 15:12:52,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095630606] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:52,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643059032] [2022-01-18 15:12:52,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:12:52,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:52,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:52,882 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:52,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-01-18 15:12:52,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:12:52,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:52,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:52,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:52,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:52,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:53,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:53,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:53,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:53,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:53,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:53,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:53,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:53,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643059032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:53,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:53,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:12:53,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872302742] [2022-01-18 15:12:53,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:53,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:12:53,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:53,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:12:53,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:12:53,214 INFO L87 Difference]: Start difference. First operand 455 states and 1418 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:53,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:53,712 INFO L93 Difference]: Finished difference Result 894 states and 2648 transitions. [2022-01-18 15:12:53,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:12:53,712 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:53,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:53,713 INFO L225 Difference]: With dead ends: 894 [2022-01-18 15:12:53,713 INFO L226 Difference]: Without dead ends: 864 [2022-01-18 15:12:53,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:12:53,713 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 119 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:53,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 215 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:12:53,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-01-18 15:12:53,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 455. [2022-01-18 15:12:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.1233480176211454) internal successors, (1418), 454 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1418 transitions. [2022-01-18 15:12:53,722 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1418 transitions. Word has length 20 [2022-01-18 15:12:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:53,722 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1418 transitions. [2022-01-18 15:12:53,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:53,722 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1418 transitions. [2022-01-18 15:12:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:53,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:53,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:53,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-01-18 15:12:53,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:53,931 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:53,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:53,931 INFO L85 PathProgramCache]: Analyzing trace with hash -82598311, now seen corresponding path program 241 times [2022-01-18 15:12:53,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:53,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491274614] [2022-01-18 15:12:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:53,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:54,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:54,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491274614] [2022-01-18 15:12:54,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491274614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:54,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374229985] [2022-01-18 15:12:54,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:12:54,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:54,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:54,088 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:54,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-01-18 15:12:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:54,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:54,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:54,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:54,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:54,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:54,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:54,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:54,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:54,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:54,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:54,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:54,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374229985] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:54,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:54,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:12:54,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837307118] [2022-01-18 15:12:54,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:54,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:12:54,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:54,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:12:54,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:12:54,508 INFO L87 Difference]: Start difference. First operand 455 states and 1418 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:54,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:54,900 INFO L93 Difference]: Finished difference Result 699 states and 2121 transitions. [2022-01-18 15:12:54,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:12:54,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:54,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:54,901 INFO L225 Difference]: With dead ends: 699 [2022-01-18 15:12:54,901 INFO L226 Difference]: Without dead ends: 684 [2022-01-18 15:12:54,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:12:54,902 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:54,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 157 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:12:54,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-01-18 15:12:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 464. [2022-01-18 15:12:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.120950323974082) internal successors, (1445), 463 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1445 transitions. [2022-01-18 15:12:54,907 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1445 transitions. Word has length 20 [2022-01-18 15:12:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:54,907 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1445 transitions. [2022-01-18 15:12:54,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1445 transitions. [2022-01-18 15:12:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:54,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:54,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:54,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-01-18 15:12:55,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:55,108 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:55,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:55,109 INFO L85 PathProgramCache]: Analyzing trace with hash 513507605, now seen corresponding path program 242 times [2022-01-18 15:12:55,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:55,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19262038] [2022-01-18 15:12:55,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:55,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:55,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:55,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19262038] [2022-01-18 15:12:55,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19262038] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:55,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886535246] [2022-01-18 15:12:55,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:12:55,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:55,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:55,232 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:55,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-01-18 15:12:55,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:12:55,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:55,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:55,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:55,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:55,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:12:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:55,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:55,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:55,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:55,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:55,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:55,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:55,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:55,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886535246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:55,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:55,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:12:55,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117422786] [2022-01-18 15:12:55,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:55,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:12:55,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:55,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:12:55,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:12:55,648 INFO L87 Difference]: Start difference. First operand 464 states and 1445 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:56,161 INFO L93 Difference]: Finished difference Result 711 states and 2151 transitions. [2022-01-18 15:12:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:12:56,161 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:56,162 INFO L225 Difference]: With dead ends: 711 [2022-01-18 15:12:56,162 INFO L226 Difference]: Without dead ends: 696 [2022-01-18 15:12:56,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:12:56,162 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:56,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 225 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:12:56,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-01-18 15:12:56,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 464. [2022-01-18 15:12:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.120950323974082) internal successors, (1445), 463 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1445 transitions. [2022-01-18 15:12:56,168 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1445 transitions. Word has length 20 [2022-01-18 15:12:56,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:56,168 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1445 transitions. [2022-01-18 15:12:56,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:56,168 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1445 transitions. [2022-01-18 15:12:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:56,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:56,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:56,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-01-18 15:12:56,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:56,369 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:56,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:56,370 INFO L85 PathProgramCache]: Analyzing trace with hash 20911843, now seen corresponding path program 243 times [2022-01-18 15:12:56,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:56,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386376794] [2022-01-18 15:12:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:56,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:56,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:56,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386376794] [2022-01-18 15:12:56,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386376794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:56,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393981619] [2022-01-18 15:12:56,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:12:56,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:56,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:56,491 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:56,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-01-18 15:12:56,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:12:56,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:56,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:56,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:56,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:56,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:56,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:56,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:56,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:56,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:56,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:56,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:56,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:56,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393981619] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:56,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:56,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-18 15:12:56,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449256009] [2022-01-18 15:12:56,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:56,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:12:56,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:56,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:12:56,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:12:56,924 INFO L87 Difference]: Start difference. First operand 464 states and 1445 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:57,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:57,325 INFO L93 Difference]: Finished difference Result 644 states and 1958 transitions. [2022-01-18 15:12:57,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:12:57,325 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:57,326 INFO L225 Difference]: With dead ends: 644 [2022-01-18 15:12:57,326 INFO L226 Difference]: Without dead ends: 629 [2022-01-18 15:12:57,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:12:57,326 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 64 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:57,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 202 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:12:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-18 15:12:57,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 461. [2022-01-18 15:12:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.121739130434783) internal successors, (1436), 460 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1436 transitions. [2022-01-18 15:12:57,332 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1436 transitions. Word has length 20 [2022-01-18 15:12:57,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:57,332 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1436 transitions. [2022-01-18 15:12:57,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1436 transitions. [2022-01-18 15:12:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:57,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:57,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:57,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:57,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:57,538 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:57,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:57,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1506001169, now seen corresponding path program 244 times [2022-01-18 15:12:57,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:57,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175099811] [2022-01-18 15:12:57,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:57,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:57,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:57,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175099811] [2022-01-18 15:12:57,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175099811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:57,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518404431] [2022-01-18 15:12:57,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:12:57,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:57,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:57,657 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:57,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-01-18 15:12:57,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:12:57,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:57,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:12:57,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:57,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:57,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:12:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:57,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:57,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:57,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:58,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:58,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:12:58,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:58,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:12:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:58,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518404431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:58,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:58,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:12:58,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328477917] [2022-01-18 15:12:58,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:58,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:12:58,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:58,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:12:58,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:12:58,037 INFO L87 Difference]: Start difference. First operand 461 states and 1436 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:12:58,408 INFO L93 Difference]: Finished difference Result 746 states and 2252 transitions. [2022-01-18 15:12:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:12:58,409 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:12:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:12:58,410 INFO L225 Difference]: With dead ends: 746 [2022-01-18 15:12:58,411 INFO L226 Difference]: Without dead ends: 731 [2022-01-18 15:12:58,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:12:58,411 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 92 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:12:58,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 175 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:12:58,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-01-18 15:12:58,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 461. [2022-01-18 15:12:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.121739130434783) internal successors, (1436), 460 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1436 transitions. [2022-01-18 15:12:58,418 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1436 transitions. Word has length 20 [2022-01-18 15:12:58,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:12:58,419 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1436 transitions. [2022-01-18 15:12:58,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:12:58,419 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1436 transitions. [2022-01-18 15:12:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:12:58,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:12:58,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:12:58,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-01-18 15:12:58,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-01-18 15:12:58,623 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:12:58,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:12:58,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1996347205, now seen corresponding path program 245 times [2022-01-18 15:12:58,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:12:58,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895397804] [2022-01-18 15:12:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:12:58,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:12:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:12:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:58,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:12:58,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895397804] [2022-01-18 15:12:58,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895397804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:12:58,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327552029] [2022-01-18 15:12:58,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:12:58,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:12:58,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:12:58,733 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:12:58,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-01-18 15:12:58,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:12:58,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:12:58,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:12:58,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:12:58,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:12:58,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-01-18 15:12:58,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 15:12:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:59,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:12:59,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:12:59,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:12:59,261 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:12:59,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-01-18 15:12:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:12:59,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327552029] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:12:59,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:12:59,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:12:59,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030327228] [2022-01-18 15:12:59,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:12:59,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:12:59,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:12:59,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:12:59,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:12:59,266 INFO L87 Difference]: Start difference. First operand 461 states and 1436 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:00,566 INFO L93 Difference]: Finished difference Result 1051 states and 3126 transitions. [2022-01-18 15:13:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:13:00,567 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:00,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:00,568 INFO L225 Difference]: With dead ends: 1051 [2022-01-18 15:13:00,568 INFO L226 Difference]: Without dead ends: 1006 [2022-01-18 15:13:00,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=484, Invalid=1966, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:13:00,569 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 278 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:00,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 241 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:13:00,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-01-18 15:13:00,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 476. [2022-01-18 15:13:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.130526315789474) internal successors, (1487), 475 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1487 transitions. [2022-01-18 15:13:00,576 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1487 transitions. Word has length 20 [2022-01-18 15:13:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:00,576 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1487 transitions. [2022-01-18 15:13:00,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:00,576 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1487 transitions. [2022-01-18 15:13:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:00,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:00,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:00,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-01-18 15:13:00,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-01-18 15:13:00,777 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:00,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:00,778 INFO L85 PathProgramCache]: Analyzing trace with hash -381198051, now seen corresponding path program 246 times [2022-01-18 15:13:00,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:00,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514990954] [2022-01-18 15:13:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:00,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:00,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:00,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514990954] [2022-01-18 15:13:00,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514990954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:00,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368580913] [2022-01-18 15:13:00,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:13:00,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:00,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:00,920 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:00,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-01-18 15:13:00,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:13:00,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:00,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:13:00,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:00,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:01,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:01,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:01,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:01,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:01,313 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:01,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:01,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368580913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:01,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:01,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:13:01,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099432970] [2022-01-18 15:13:01,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:01,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:13:01,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:01,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:13:01,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:01,319 INFO L87 Difference]: Start difference. First operand 476 states and 1487 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:01,759 INFO L93 Difference]: Finished difference Result 822 states and 2479 transitions. [2022-01-18 15:13:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:13:01,759 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:01,760 INFO L225 Difference]: With dead ends: 822 [2022-01-18 15:13:01,760 INFO L226 Difference]: Without dead ends: 807 [2022-01-18 15:13:01,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:13:01,761 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 80 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:01,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 192 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-01-18 15:13:01,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 479. [2022-01-18 15:13:01,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1297071129707112) internal successors, (1496), 478 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1496 transitions. [2022-01-18 15:13:01,767 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1496 transitions. Word has length 20 [2022-01-18 15:13:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:01,767 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1496 transitions. [2022-01-18 15:13:01,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1496 transitions. [2022-01-18 15:13:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:01,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:01,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:01,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-01-18 15:13:01,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-01-18 15:13:01,968 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:01,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:01,968 INFO L85 PathProgramCache]: Analyzing trace with hash 214907865, now seen corresponding path program 247 times [2022-01-18 15:13:01,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:01,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001635358] [2022-01-18 15:13:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:01,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:02,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:02,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001635358] [2022-01-18 15:13:02,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001635358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:02,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667216893] [2022-01-18 15:13:02,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:13:02,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:02,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:02,094 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:02,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-01-18 15:13:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:02,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:13:02,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:02,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:02,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:02,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:02,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:02,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:02,496 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:02,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:02,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667216893] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:02,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:02,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:13:02,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346874456] [2022-01-18 15:13:02,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:02,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:13:02,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:02,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:13:02,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:02,502 INFO L87 Difference]: Start difference. First operand 479 states and 1496 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:02,967 INFO L93 Difference]: Finished difference Result 834 states and 2509 transitions. [2022-01-18 15:13:02,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:13:02,968 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:02,969 INFO L225 Difference]: With dead ends: 834 [2022-01-18 15:13:02,969 INFO L226 Difference]: Without dead ends: 819 [2022-01-18 15:13:02,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:13:02,969 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 92 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:02,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 183 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-01-18 15:13:02,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 479. [2022-01-18 15:13:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1297071129707112) internal successors, (1496), 478 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1496 transitions. [2022-01-18 15:13:02,976 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1496 transitions. Word has length 20 [2022-01-18 15:13:02,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:02,976 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1496 transitions. [2022-01-18 15:13:02,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1496 transitions. [2022-01-18 15:13:02,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:02,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:02,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:02,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:03,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:03,177 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:03,178 INFO L85 PathProgramCache]: Analyzing trace with hash -277687897, now seen corresponding path program 248 times [2022-01-18 15:13:03,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:03,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844998827] [2022-01-18 15:13:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:03,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:03,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:03,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844998827] [2022-01-18 15:13:03,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844998827] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:03,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753805275] [2022-01-18 15:13:03,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:13:03,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:03,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:03,291 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:03,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-01-18 15:13:03,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:03,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:03,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:13:03,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:03,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:03,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:13:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:03,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:03,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:03,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:13:03,677 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:03,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:03,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753805275] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:03,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:03,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:13:03,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279492627] [2022-01-18 15:13:03,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:03,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:13:03,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:03,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:13:03,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:03,683 INFO L87 Difference]: Start difference. First operand 479 states and 1496 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:04,143 INFO L93 Difference]: Finished difference Result 784 states and 2366 transitions. [2022-01-18 15:13:04,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:13:04,143 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:04,144 INFO L225 Difference]: With dead ends: 784 [2022-01-18 15:13:04,144 INFO L226 Difference]: Without dead ends: 769 [2022-01-18 15:13:04,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:13:04,145 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 67 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:04,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 247 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:04,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-18 15:13:04,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 476. [2022-01-18 15:13:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.130526315789474) internal successors, (1487), 475 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1487 transitions. [2022-01-18 15:13:04,150 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1487 transitions. Word has length 20 [2022-01-18 15:13:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:04,150 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1487 transitions. [2022-01-18 15:13:04,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1487 transitions. [2022-01-18 15:13:04,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:04,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:04,151 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:04,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-01-18 15:13:04,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-01-18 15:13:04,352 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:04,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:04,352 INFO L85 PathProgramCache]: Analyzing trace with hash 693787661, now seen corresponding path program 249 times [2022-01-18 15:13:04,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:04,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338572392] [2022-01-18 15:13:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:04,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:04,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:04,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338572392] [2022-01-18 15:13:04,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338572392] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:04,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660351447] [2022-01-18 15:13:04,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:13:04,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:04,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:04,462 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:04,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-01-18 15:13:04,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:13:04,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:04,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:13:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:04,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:04,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:04,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:04,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:04,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:04,853 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:04,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:04,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660351447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:04,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:04,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:13:04,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245810988] [2022-01-18 15:13:04,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:04,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:13:04,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:04,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:13:04,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:04,859 INFO L87 Difference]: Start difference. First operand 476 states and 1487 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:05,400 INFO L93 Difference]: Finished difference Result 840 states and 2533 transitions. [2022-01-18 15:13:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:13:05,400 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:05,402 INFO L225 Difference]: With dead ends: 840 [2022-01-18 15:13:05,402 INFO L226 Difference]: Without dead ends: 825 [2022-01-18 15:13:05,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:13:05,402 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 94 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:05,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 245 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-18 15:13:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 485. [2022-01-18 15:13:05,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.128099173553719) internal successors, (1514), 484 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1514 transitions. [2022-01-18 15:13:05,408 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1514 transitions. Word has length 20 [2022-01-18 15:13:05,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:05,408 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1514 transitions. [2022-01-18 15:13:05,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1514 transitions. [2022-01-18 15:13:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:05,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:05,409 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:05,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-01-18 15:13:05,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-01-18 15:13:05,609 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:05,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:05,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1289893577, now seen corresponding path program 250 times [2022-01-18 15:13:05,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:05,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873674086] [2022-01-18 15:13:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:05,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:05,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:05,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873674086] [2022-01-18 15:13:05,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873674086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:05,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106980033] [2022-01-18 15:13:05,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:13:05,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:05,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:05,736 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:05,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-01-18 15:13:05,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:13:05,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:05,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:13:05,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:05,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:05,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:05,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:06,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:06,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:06,138 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:06,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:06,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106980033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:06,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:06,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:13:06,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643166574] [2022-01-18 15:13:06,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:06,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:13:06,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:06,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:13:06,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:06,144 INFO L87 Difference]: Start difference. First operand 485 states and 1514 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:06,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:06,672 INFO L93 Difference]: Finished difference Result 852 states and 2563 transitions. [2022-01-18 15:13:06,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:13:06,672 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:06,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:06,673 INFO L225 Difference]: With dead ends: 852 [2022-01-18 15:13:06,673 INFO L226 Difference]: Without dead ends: 837 [2022-01-18 15:13:06,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:13:06,673 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:06,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 214 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-01-18 15:13:06,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 485. [2022-01-18 15:13:06,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.128099173553719) internal successors, (1514), 484 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:06,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1514 transitions. [2022-01-18 15:13:06,680 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1514 transitions. Word has length 20 [2022-01-18 15:13:06,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:06,680 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1514 transitions. [2022-01-18 15:13:06,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:06,680 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1514 transitions. [2022-01-18 15:13:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:06,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:06,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:06,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-01-18 15:13:06,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:06,881 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:06,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:06,881 INFO L85 PathProgramCache]: Analyzing trace with hash 797297815, now seen corresponding path program 251 times [2022-01-18 15:13:06,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:06,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718770250] [2022-01-18 15:13:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:06,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:06,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:06,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718770250] [2022-01-18 15:13:06,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718770250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:06,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747598374] [2022-01-18 15:13:06,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:13:06,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:06,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:06,993 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:06,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-01-18 15:13:07,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:13:07,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:07,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 15:13:07,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:07,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:07,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:13:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:07,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:07,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:07,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-18 15:13:07,589 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:07,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-01-18 15:13:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:07,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747598374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:07,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:07,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:13:07,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69938600] [2022-01-18 15:13:07,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:07,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:13:07,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:07,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:13:07,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:07,595 INFO L87 Difference]: Start difference. First operand 485 states and 1514 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:08,330 INFO L93 Difference]: Finished difference Result 856 states and 2574 transitions. [2022-01-18 15:13:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:13:08,330 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:08,332 INFO L225 Difference]: With dead ends: 856 [2022-01-18 15:13:08,332 INFO L226 Difference]: Without dead ends: 811 [2022-01-18 15:13:08,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:13:08,332 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 120 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:08,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 246 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:13:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-01-18 15:13:08,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 491. [2022-01-18 15:13:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.1448979591836737) internal successors, (1541), 490 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1541 transitions. [2022-01-18 15:13:08,338 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1541 transitions. Word has length 20 [2022-01-18 15:13:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:08,338 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1541 transitions. [2022-01-18 15:13:08,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1541 transitions. [2022-01-18 15:13:08,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:08,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:08,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:08,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-01-18 15:13:08,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:08,540 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:08,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:08,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2012580155, now seen corresponding path program 252 times [2022-01-18 15:13:08,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:08,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241316800] [2022-01-18 15:13:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:08,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:08,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:08,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241316800] [2022-01-18 15:13:08,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241316800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:08,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269724037] [2022-01-18 15:13:08,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:13:08,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:08,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:08,638 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:08,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-01-18 15:13:08,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:13:08,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:08,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:13:08,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:08,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:08,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:13:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:08,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:08,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:08,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:13:08,960 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:08,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:08,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269724037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:08,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:08,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 18 [2022-01-18 15:13:08,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875348192] [2022-01-18 15:13:08,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:08,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:13:08,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:08,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:13:08,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:13:08,966 INFO L87 Difference]: Start difference. First operand 491 states and 1541 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:09,301 INFO L93 Difference]: Finished difference Result 859 states and 2614 transitions. [2022-01-18 15:13:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:13:09,301 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:09,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:09,302 INFO L225 Difference]: With dead ends: 859 [2022-01-18 15:13:09,303 INFO L226 Difference]: Without dead ends: 844 [2022-01-18 15:13:09,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:13:09,303 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 92 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:09,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 171 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-01-18 15:13:09,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 491. [2022-01-18 15:13:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.1448979591836737) internal successors, (1541), 490 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1541 transitions. [2022-01-18 15:13:09,310 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1541 transitions. Word has length 20 [2022-01-18 15:13:09,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:09,310 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1541 transitions. [2022-01-18 15:13:09,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1541 transitions. [2022-01-18 15:13:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:09,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:09,311 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:09,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-01-18 15:13:09,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:09,511 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:09,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:09,511 INFO L85 PathProgramCache]: Analyzing trace with hash -398044769, now seen corresponding path program 253 times [2022-01-18 15:13:09,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:09,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731719531] [2022-01-18 15:13:09,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:09,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:09,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:09,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731719531] [2022-01-18 15:13:09,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731719531] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:09,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877856841] [2022-01-18 15:13:09,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:13:09,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:09,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:09,620 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:09,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-01-18 15:13:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:09,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:13:09,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:09,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:09,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:09,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:09,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:09,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:09,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:13:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:09,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:09,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:09,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:10,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:10,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:13:10,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:10,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:10,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877856841] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:10,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:10,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:13:10,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872058698] [2022-01-18 15:13:10,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:10,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:13:10,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:10,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:13:10,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:13:10,088 INFO L87 Difference]: Start difference. First operand 491 states and 1541 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:10,297 INFO L93 Difference]: Finished difference Result 675 states and 2071 transitions. [2022-01-18 15:13:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:13:10,297 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:10,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:10,298 INFO L225 Difference]: With dead ends: 675 [2022-01-18 15:13:10,298 INFO L226 Difference]: Without dead ends: 660 [2022-01-18 15:13:10,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:10,298 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:10,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 159 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 406 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-01-18 15:13:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-01-18 15:13:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 484. [2022-01-18 15:13:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1366459627329193) internal successors, (1515), 483 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1515 transitions. [2022-01-18 15:13:10,304 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1515 transitions. Word has length 20 [2022-01-18 15:13:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:10,304 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1515 transitions. [2022-01-18 15:13:10,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1515 transitions. [2022-01-18 15:13:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:10,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:10,305 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:10,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-01-18 15:13:10,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:10,505 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:10,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:10,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1096251483, now seen corresponding path program 254 times [2022-01-18 15:13:10,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:10,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684252107] [2022-01-18 15:13:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:10,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:10,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:10,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684252107] [2022-01-18 15:13:10,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684252107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:10,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108868820] [2022-01-18 15:13:10,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:13:10,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:10,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:10,640 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:10,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-01-18 15:13:10,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:10,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:10,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:13:10,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:10,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:10,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:10,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:10,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:10,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:10,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:13:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:10,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:10,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:10,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:13:11,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:11,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:13:11,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:11,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:13:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:11,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108868820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:11,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:11,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:13:11,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012859773] [2022-01-18 15:13:11,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:11,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:13:11,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:11,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:13:11,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:11,142 INFO L87 Difference]: Start difference. First operand 484 states and 1515 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:11,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:11,489 INFO L93 Difference]: Finished difference Result 897 states and 2677 transitions. [2022-01-18 15:13:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:13:11,489 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:11,491 INFO L225 Difference]: With dead ends: 897 [2022-01-18 15:13:11,491 INFO L226 Difference]: Without dead ends: 867 [2022-01-18 15:13:11,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:13:11,491 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:11,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 258 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 574 Invalid, 0 Unknown, 237 Unchecked, 0.2s Time] [2022-01-18 15:13:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-01-18 15:13:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 481. [2022-01-18 15:13:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.1375) internal successors, (1506), 480 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1506 transitions. [2022-01-18 15:13:11,500 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1506 transitions. Word has length 20 [2022-01-18 15:13:11,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:11,500 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1506 transitions. [2022-01-18 15:13:11,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:11,500 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1506 transitions. [2022-01-18 15:13:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:11,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:11,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:11,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-01-18 15:13:11,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-01-18 15:13:11,701 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:11,702 INFO L85 PathProgramCache]: Analyzing trace with hash 931801101, now seen corresponding path program 255 times [2022-01-18 15:13:11,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:11,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362920914] [2022-01-18 15:13:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:11,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:11,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:11,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362920914] [2022-01-18 15:13:11,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362920914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:11,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935336068] [2022-01-18 15:13:11,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:13:11,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:11,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:11,834 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:11,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-01-18 15:13:11,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:13:11,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:11,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:13:11,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:11,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:11,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:12,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:12,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:12,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:12,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:13:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:12,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:12,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:12,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:12,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:12,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:13:12,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:12,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:12,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935336068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:12,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:12,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:13:12,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512028960] [2022-01-18 15:13:12,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:12,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:13:12,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:12,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:13:12,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:12,344 INFO L87 Difference]: Start difference. First operand 481 states and 1506 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:12,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:12,618 INFO L93 Difference]: Finished difference Result 728 states and 2194 transitions. [2022-01-18 15:13:12,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:13:12,618 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:12,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:12,619 INFO L225 Difference]: With dead ends: 728 [2022-01-18 15:13:12,619 INFO L226 Difference]: Without dead ends: 713 [2022-01-18 15:13:12,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:13:12,619 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:12,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 195 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 476 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-01-18 15:13:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-01-18 15:13:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 479. [2022-01-18 15:13:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.1338912133891212) internal successors, (1498), 478 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1498 transitions. [2022-01-18 15:13:12,625 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1498 transitions. Word has length 20 [2022-01-18 15:13:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:12,625 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1498 transitions. [2022-01-18 15:13:12,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1498 transitions. [2022-01-18 15:13:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:12,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:12,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:12,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-01-18 15:13:12,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-01-18 15:13:12,826 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:12,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:12,827 INFO L85 PathProgramCache]: Analyzing trace with hash 178417485, now seen corresponding path program 256 times [2022-01-18 15:13:12,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:12,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607204745] [2022-01-18 15:13:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:12,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:12,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:12,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607204745] [2022-01-18 15:13:12,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607204745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:12,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754465129] [2022-01-18 15:13:12,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:13:12,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:12,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:12,985 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:12,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-01-18 15:13:13,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:13:13,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:13,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:13:13,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:13,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:13,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:13,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:13,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:13,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:13,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:13:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:13,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:13,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:13,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:13,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:13,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:13:13,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:13,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:13,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754465129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:13,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:13,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-18 15:13:13,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287126500] [2022-01-18 15:13:13,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:13,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:13:13,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:13,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:13:13,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:13,565 INFO L87 Difference]: Start difference. First operand 479 states and 1498 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:13,848 INFO L93 Difference]: Finished difference Result 746 states and 2247 transitions. [2022-01-18 15:13:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:13:13,848 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:13,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:13,849 INFO L225 Difference]: With dead ends: 746 [2022-01-18 15:13:13,849 INFO L226 Difference]: Without dead ends: 739 [2022-01-18 15:13:13,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:13:13,850 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:13,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 167 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 491 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2022-01-18 15:13:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-01-18 15:13:13,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 469. [2022-01-18 15:13:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.126068376068376) internal successors, (1463), 468 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1463 transitions. [2022-01-18 15:13:13,855 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1463 transitions. Word has length 20 [2022-01-18 15:13:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:13,856 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1463 transitions. [2022-01-18 15:13:13,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1463 transitions. [2022-01-18 15:13:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 15:13:13,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:13,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:13,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-01-18 15:13:14,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:14,059 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:14,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:14,059 INFO L85 PathProgramCache]: Analyzing trace with hash -275875249, now seen corresponding path program 257 times [2022-01-18 15:13:14,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:14,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206470170] [2022-01-18 15:13:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:14,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:14,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:14,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206470170] [2022-01-18 15:13:14,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206470170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:14,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753895434] [2022-01-18 15:13:14,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:13:14,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:14,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:14,168 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:14,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-01-18 15:13:14,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:14,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:14,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:13:14,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:14,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:14,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:14,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:14,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:14,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:13:14,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:13:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:14,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:14,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:14,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:14,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:14,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:13:14,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:14,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:14,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753895434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:14,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:14,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:13:14,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687915775] [2022-01-18 15:13:14,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:14,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:13:14,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:14,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:13:14,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:13:14,623 INFO L87 Difference]: Start difference. First operand 469 states and 1463 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:14,865 INFO L93 Difference]: Finished difference Result 649 states and 1975 transitions. [2022-01-18 15:13:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:13:14,866 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 15:13:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:14,866 INFO L225 Difference]: With dead ends: 649 [2022-01-18 15:13:14,866 INFO L226 Difference]: Without dead ends: 634 [2022-01-18 15:13:14,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:14,867 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:14,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 152 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 507 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-01-18 15:13:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-01-18 15:13:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 461. [2022-01-18 15:13:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.128260869565217) internal successors, (1439), 460 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1439 transitions. [2022-01-18 15:13:14,872 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1439 transitions. Word has length 20 [2022-01-18 15:13:14,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:14,872 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1439 transitions. [2022-01-18 15:13:14,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:14,872 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1439 transitions. [2022-01-18 15:13:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:14,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:14,873 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:14,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-01-18 15:13:15,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-01-18 15:13:15,073 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:15,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:15,074 INFO L85 PathProgramCache]: Analyzing trace with hash 788344076, now seen corresponding path program 258 times [2022-01-18 15:13:15,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:15,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656854622] [2022-01-18 15:13:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:15,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:15,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:15,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656854622] [2022-01-18 15:13:15,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656854622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:15,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523569625] [2022-01-18 15:13:15,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:13:15,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:15,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:15,161 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:15,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-01-18 15:13:15,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:13:15,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:15,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:15,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:15,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:15,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:15,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:15,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:15,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:15,419 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:15,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:15,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523569625] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:15,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:15,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-18 15:13:15,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48650055] [2022-01-18 15:13:15,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:15,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:13:15,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:13:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:13:15,423 INFO L87 Difference]: Start difference. First operand 461 states and 1439 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:16,259 INFO L93 Difference]: Finished difference Result 901 states and 2698 transitions. [2022-01-18 15:13:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:13:16,260 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:16,261 INFO L225 Difference]: With dead ends: 901 [2022-01-18 15:13:16,261 INFO L226 Difference]: Without dead ends: 882 [2022-01-18 15:13:16,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:13:16,261 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 245 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:16,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 235 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:13:16,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-01-18 15:13:16,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 476. [2022-01-18 15:13:16,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.143157894736842) internal successors, (1493), 475 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1493 transitions. [2022-01-18 15:13:16,268 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1493 transitions. Word has length 21 [2022-01-18 15:13:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:16,268 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 1493 transitions. [2022-01-18 15:13:16,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1493 transitions. [2022-01-18 15:13:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:16,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:16,268 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:16,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-01-18 15:13:16,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-01-18 15:13:16,469 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:16,469 INFO L85 PathProgramCache]: Analyzing trace with hash 859801630, now seen corresponding path program 259 times [2022-01-18 15:13:16,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:16,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969949740] [2022-01-18 15:13:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:16,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:16,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:16,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969949740] [2022-01-18 15:13:16,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969949740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:16,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139603192] [2022-01-18 15:13:16,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:13:16,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:16,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:16,556 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:16,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-01-18 15:13:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:16,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:16,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:16,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:16,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:16,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:16,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:16,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:13:16,838 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:16,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:16,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139603192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:16,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:16,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-18 15:13:16,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292542464] [2022-01-18 15:13:16,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:16,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:13:16,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:16,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:13:16,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:13:16,842 INFO L87 Difference]: Start difference. First operand 476 states and 1493 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:17,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:17,135 INFO L93 Difference]: Finished difference Result 751 states and 2287 transitions. [2022-01-18 15:13:17,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:13:17,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:17,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:17,136 INFO L225 Difference]: With dead ends: 751 [2022-01-18 15:13:17,136 INFO L226 Difference]: Without dead ends: 732 [2022-01-18 15:13:17,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:13:17,136 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 100 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:17,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 167 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-01-18 15:13:17,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 473. [2022-01-18 15:13:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 3.1546610169491527) internal successors, (1489), 472 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1489 transitions. [2022-01-18 15:13:17,144 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1489 transitions. Word has length 21 [2022-01-18 15:13:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:17,144 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1489 transitions. [2022-01-18 15:13:17,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:17,145 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1489 transitions. [2022-01-18 15:13:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:17,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:17,145 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:17,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:17,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:17,358 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:17,358 INFO L85 PathProgramCache]: Analyzing trace with hash -542737268, now seen corresponding path program 260 times [2022-01-18 15:13:17,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:17,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381913347] [2022-01-18 15:13:17,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:17,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:17,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:17,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381913347] [2022-01-18 15:13:17,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381913347] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:17,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278196473] [2022-01-18 15:13:17,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:13:17,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:17,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:17,446 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:17,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-01-18 15:13:17,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:17,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:17,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:17,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:17,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:17,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:17,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:17,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:17,736 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:17,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:17,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278196473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:17,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:17,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-18 15:13:17,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945403974] [2022-01-18 15:13:17,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:17,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:13:17,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:17,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:13:17,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:13:17,740 INFO L87 Difference]: Start difference. First operand 473 states and 1489 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:18,210 INFO L93 Difference]: Finished difference Result 833 states and 2526 transitions. [2022-01-18 15:13:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:13:18,210 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:18,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:18,212 INFO L225 Difference]: With dead ends: 833 [2022-01-18 15:13:18,212 INFO L226 Difference]: Without dead ends: 814 [2022-01-18 15:13:18,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:13:18,212 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 106 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:18,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 277 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:18,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-18 15:13:18,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 488. [2022-01-18 15:13:18,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.158110882956879) internal successors, (1538), 487 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1538 transitions. [2022-01-18 15:13:18,218 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1538 transitions. Word has length 21 [2022-01-18 15:13:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:18,218 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1538 transitions. [2022-01-18 15:13:18,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1538 transitions. [2022-01-18 15:13:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:18,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:18,219 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:18,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:18,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2022-01-18 15:13:18,419 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:18,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:18,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1536556560, now seen corresponding path program 261 times [2022-01-18 15:13:18,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:18,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139455929] [2022-01-18 15:13:18,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:18,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:18,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:18,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139455929] [2022-01-18 15:13:18,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139455929] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:18,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102602134] [2022-01-18 15:13:18,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:13:18,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:18,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:18,517 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:18,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-01-18 15:13:18,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:13:18,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:18,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:18,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:18,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:18,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:18,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:18,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:18,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:18,811 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:18,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:18,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102602134] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:18,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:18,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-18 15:13:18,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529403071] [2022-01-18 15:13:18,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:18,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:13:18,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:18,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:13:18,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:13:18,816 INFO L87 Difference]: Start difference. First operand 488 states and 1538 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:19,327 INFO L93 Difference]: Finished difference Result 841 states and 2546 transitions. [2022-01-18 15:13:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:13:19,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:19,329 INFO L225 Difference]: With dead ends: 841 [2022-01-18 15:13:19,329 INFO L226 Difference]: Without dead ends: 822 [2022-01-18 15:13:19,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:13:19,329 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 112 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:19,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 276 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:13:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-01-18 15:13:19,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 484. [2022-01-18 15:13:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1511387163561078) internal successors, (1522), 483 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:19,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1522 transitions. [2022-01-18 15:13:19,338 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1522 transitions. Word has length 21 [2022-01-18 15:13:19,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:19,338 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1522 transitions. [2022-01-18 15:13:19,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:19,339 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1522 transitions. [2022-01-18 15:13:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:19,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:19,339 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:19,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:19,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:19,559 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:19,559 INFO L85 PathProgramCache]: Analyzing trace with hash -612239976, now seen corresponding path program 262 times [2022-01-18 15:13:19,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:19,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783298375] [2022-01-18 15:13:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:19,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:19,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:19,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783298375] [2022-01-18 15:13:19,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783298375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:19,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565129327] [2022-01-18 15:13:19,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:13:19,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:19,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:19,646 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:19,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-01-18 15:13:19,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:13:19,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:19,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:19,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:19,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:19,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:19,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:19,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:19,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:13:19,922 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:19,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:19,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565129327] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:19,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:19,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-18 15:13:19,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800815080] [2022-01-18 15:13:19,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:19,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:13:19,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:19,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:13:19,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:13:19,926 INFO L87 Difference]: Start difference. First operand 484 states and 1522 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:20,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:20,304 INFO L93 Difference]: Finished difference Result 761 states and 2318 transitions. [2022-01-18 15:13:20,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:13:20,305 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:20,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:20,306 INFO L225 Difference]: With dead ends: 761 [2022-01-18 15:13:20,306 INFO L226 Difference]: Without dead ends: 742 [2022-01-18 15:13:20,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:13:20,306 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 89 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:20,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 230 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-01-18 15:13:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 480. [2022-01-18 15:13:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.152400835073069) internal successors, (1510), 479 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1510 transitions. [2022-01-18 15:13:20,312 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1510 transitions. Word has length 21 [2022-01-18 15:13:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:20,312 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1510 transitions. [2022-01-18 15:13:20,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1510 transitions. [2022-01-18 15:13:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:20,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:20,313 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:20,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-01-18 15:13:20,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:20,514 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:20,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:20,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1706331564, now seen corresponding path program 263 times [2022-01-18 15:13:20,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:20,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737717263] [2022-01-18 15:13:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:20,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:20,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:20,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737717263] [2022-01-18 15:13:20,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737717263] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:20,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764608716] [2022-01-18 15:13:20,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:13:20,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:20,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:20,607 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:20,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-01-18 15:13:20,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:13:20,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:20,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:13:20,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:20,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:20,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:20,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:20,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:20,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:13:20,996 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:20,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 15:13:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:20,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764608716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:21,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:21,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:13:21,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185050313] [2022-01-18 15:13:21,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:21,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:13:21,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:21,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:13:21,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:13:21,000 INFO L87 Difference]: Start difference. First operand 480 states and 1510 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:21,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:21,690 INFO L93 Difference]: Finished difference Result 926 states and 2788 transitions. [2022-01-18 15:13:21,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:13:21,690 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:21,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:21,692 INFO L225 Difference]: With dead ends: 926 [2022-01-18 15:13:21,692 INFO L226 Difference]: Without dead ends: 869 [2022-01-18 15:13:21,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=828, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:13:21,692 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 206 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:21,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 268 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:13:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-01-18 15:13:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 509. [2022-01-18 15:13:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.161417322834646) internal successors, (1606), 508 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1606 transitions. [2022-01-18 15:13:21,699 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1606 transitions. Word has length 21 [2022-01-18 15:13:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:21,699 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 1606 transitions. [2022-01-18 15:13:21,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1606 transitions. [2022-01-18 15:13:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:21,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:21,699 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:21,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-01-18 15:13:21,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:21,900 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:21,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1385635212, now seen corresponding path program 264 times [2022-01-18 15:13:21,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:21,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760042780] [2022-01-18 15:13:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:21,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:21,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:21,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760042780] [2022-01-18 15:13:21,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760042780] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:21,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819752791] [2022-01-18 15:13:21,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:13:21,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:21,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:21,998 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:21,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-01-18 15:13:22,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:13:22,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:22,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:22,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:22,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:22,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:22,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:22,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:22,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:22,325 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:22,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:22,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819752791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:22,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:22,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:13:22,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376082899] [2022-01-18 15:13:22,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:22,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:13:22,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:13:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:13:22,330 INFO L87 Difference]: Start difference. First operand 509 states and 1606 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:23,472 INFO L93 Difference]: Finished difference Result 1231 states and 3723 transitions. [2022-01-18 15:13:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:13:23,472 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:23,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:23,475 INFO L225 Difference]: With dead ends: 1231 [2022-01-18 15:13:23,475 INFO L226 Difference]: Without dead ends: 1212 [2022-01-18 15:13:23,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=484, Invalid=2378, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:13:23,475 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 301 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:23,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 262 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:13:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2022-01-18 15:13:23,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 517. [2022-01-18 15:13:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.1744186046511627) internal successors, (1638), 516 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1638 transitions. [2022-01-18 15:13:23,484 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1638 transitions. Word has length 21 [2022-01-18 15:13:23,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:23,484 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1638 transitions. [2022-01-18 15:13:23,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:23,484 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1638 transitions. [2022-01-18 15:13:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:23,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:23,485 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:23,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-01-18 15:13:23,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:23,686 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:23,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:23,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1313940245, now seen corresponding path program 265 times [2022-01-18 15:13:23,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:23,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879164129] [2022-01-18 15:13:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:23,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:23,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:23,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879164129] [2022-01-18 15:13:23,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879164129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:23,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639836539] [2022-01-18 15:13:23,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:13:23,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:23,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:23,783 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:23,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-01-18 15:13:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:23,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:23,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:23,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:23,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:24,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:24,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:13:24,142 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:24,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-01-18 15:13:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:24,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639836539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:24,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:24,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:13:24,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873290154] [2022-01-18 15:13:24,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:24,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:13:24,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:24,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:13:24,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:13:24,146 INFO L87 Difference]: Start difference. First operand 517 states and 1638 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:24,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:24,666 INFO L93 Difference]: Finished difference Result 1010 states and 3066 transitions. [2022-01-18 15:13:24,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:13:24,666 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:24,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:24,667 INFO L225 Difference]: With dead ends: 1010 [2022-01-18 15:13:24,667 INFO L226 Difference]: Without dead ends: 971 [2022-01-18 15:13:24,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:13:24,668 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 194 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:24,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 250 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:24,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-01-18 15:13:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 522. [2022-01-18 15:13:24,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.1765834932821497) internal successors, (1655), 521 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1655 transitions. [2022-01-18 15:13:24,675 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1655 transitions. Word has length 21 [2022-01-18 15:13:24,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:24,675 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1655 transitions. [2022-01-18 15:13:24,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1655 transitions. [2022-01-18 15:13:24,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:24,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:24,676 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:24,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-01-18 15:13:24,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-01-18 15:13:24,876 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:24,876 INFO L85 PathProgramCache]: Analyzing trace with hash 966631892, now seen corresponding path program 266 times [2022-01-18 15:13:24,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:24,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718910303] [2022-01-18 15:13:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:24,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:24,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:24,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718910303] [2022-01-18 15:13:24,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718910303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:24,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006690097] [2022-01-18 15:13:24,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:13:24,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:24,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:24,996 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:24,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-01-18 15:13:25,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:25,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:25,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:25,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:25,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:25,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:25,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:25,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:25,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:25,341 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:25,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:25,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006690097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:25,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:25,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:13:25,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285568074] [2022-01-18 15:13:25,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:25,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:13:25,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:25,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:13:25,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:13:25,345 INFO L87 Difference]: Start difference. First operand 522 states and 1655 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:26,397 INFO L93 Difference]: Finished difference Result 1197 states and 3639 transitions. [2022-01-18 15:13:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:13:26,397 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:26,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:26,399 INFO L225 Difference]: With dead ends: 1197 [2022-01-18 15:13:26,399 INFO L226 Difference]: Without dead ends: 1178 [2022-01-18 15:13:26,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 15:13:26,399 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 232 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:26,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 323 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:13:26,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-01-18 15:13:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 532. [2022-01-18 15:13:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 3.1864406779661016) internal successors, (1692), 531 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1692 transitions. [2022-01-18 15:13:26,410 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1692 transitions. Word has length 21 [2022-01-18 15:13:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:26,410 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1692 transitions. [2022-01-18 15:13:26,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1692 transitions. [2022-01-18 15:13:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:26,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:26,411 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:26,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-01-18 15:13:26,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:26,611 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:26,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:26,611 INFO L85 PathProgramCache]: Analyzing trace with hash -31431308, now seen corresponding path program 267 times [2022-01-18 15:13:26,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:26,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385979332] [2022-01-18 15:13:26,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:26,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:26,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:26,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385979332] [2022-01-18 15:13:26,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385979332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:26,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583065196] [2022-01-18 15:13:26,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:13:26,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:26,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:26,712 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:26,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-01-18 15:13:26,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:13:26,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:26,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:26,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:26,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:26,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:26,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:26,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:27,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:27,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:27,055 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:27,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:27,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583065196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:27,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:27,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:13:27,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940987184] [2022-01-18 15:13:27,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:27,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:13:27,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:27,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:13:27,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:13:27,059 INFO L87 Difference]: Start difference. First operand 532 states and 1692 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:28,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:28,312 INFO L93 Difference]: Finished difference Result 1405 states and 4238 transitions. [2022-01-18 15:13:28,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:13:28,312 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:28,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:28,314 INFO L225 Difference]: With dead ends: 1405 [2022-01-18 15:13:28,314 INFO L226 Difference]: Without dead ends: 1359 [2022-01-18 15:13:28,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=2441, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 15:13:28,315 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 257 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:28,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 302 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:13:28,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2022-01-18 15:13:28,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 539. [2022-01-18 15:13:28,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 3.193308550185874) internal successors, (1718), 538 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1718 transitions. [2022-01-18 15:13:28,324 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1718 transitions. Word has length 21 [2022-01-18 15:13:28,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:28,324 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1718 transitions. [2022-01-18 15:13:28,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:28,325 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1718 transitions. [2022-01-18 15:13:28,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:28,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:28,325 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:28,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-01-18 15:13:28,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-01-18 15:13:28,526 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:28,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:28,530 INFO L85 PathProgramCache]: Analyzing trace with hash -13560633, now seen corresponding path program 268 times [2022-01-18 15:13:28,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:28,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546612445] [2022-01-18 15:13:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:28,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:28,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:28,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546612445] [2022-01-18 15:13:28,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546612445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:28,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628898017] [2022-01-18 15:13:28,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:13:28,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:28,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:28,604 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:28,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-01-18 15:13:28,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:13:28,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:28,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:28,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:28,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:28,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:28,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:28,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:28,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:13:28,844 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:28,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:28,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628898017] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:28,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:28,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-18 15:13:28,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792537767] [2022-01-18 15:13:28,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:28,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:13:28,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:28,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:13:28,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:13:28,848 INFO L87 Difference]: Start difference. First operand 539 states and 1718 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:29,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:29,111 INFO L93 Difference]: Finished difference Result 1008 states and 3093 transitions. [2022-01-18 15:13:29,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:13:29,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:29,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:29,113 INFO L225 Difference]: With dead ends: 1008 [2022-01-18 15:13:29,113 INFO L226 Difference]: Without dead ends: 986 [2022-01-18 15:13:29,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:13:29,114 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 113 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:29,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 165 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2022-01-18 15:13:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 551. [2022-01-18 15:13:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 3.207272727272727) internal successors, (1764), 550 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1764 transitions. [2022-01-18 15:13:29,121 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1764 transitions. Word has length 21 [2022-01-18 15:13:29,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:29,121 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 1764 transitions. [2022-01-18 15:13:29,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:29,121 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1764 transitions. [2022-01-18 15:13:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:29,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:29,122 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:29,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-01-18 15:13:29,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-01-18 15:13:29,322 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:29,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:29,323 INFO L85 PathProgramCache]: Analyzing trace with hash 127399629, now seen corresponding path program 269 times [2022-01-18 15:13:29,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:29,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915099605] [2022-01-18 15:13:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:29,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:29,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:29,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915099605] [2022-01-18 15:13:29,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915099605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:29,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390133831] [2022-01-18 15:13:29,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:13:29,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:29,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:29,407 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:29,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-01-18 15:13:29,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:29,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:29,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:29,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:29,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:29,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:29,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:29,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:29,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:13:29,667 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:29,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:29,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390133831] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:29,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:29,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-18 15:13:29,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078694628] [2022-01-18 15:13:29,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:29,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:13:29,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:29,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:13:29,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:13:29,671 INFO L87 Difference]: Start difference. First operand 551 states and 1764 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:29,959 INFO L93 Difference]: Finished difference Result 984 states and 3034 transitions. [2022-01-18 15:13:29,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:13:29,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:29,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:29,961 INFO L225 Difference]: With dead ends: 984 [2022-01-18 15:13:29,961 INFO L226 Difference]: Without dead ends: 962 [2022-01-18 15:13:29,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:13:29,961 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:29,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 176 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-01-18 15:13:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 554. [2022-01-18 15:13:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.2043399638336347) internal successors, (1772), 553 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1772 transitions. [2022-01-18 15:13:29,968 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1772 transitions. Word has length 21 [2022-01-18 15:13:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:29,969 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1772 transitions. [2022-01-18 15:13:29,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:29,969 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1772 transitions. [2022-01-18 15:13:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:29,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:29,969 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:29,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-01-18 15:13:30,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-01-18 15:13:30,170 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:30,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:30,170 INFO L85 PathProgramCache]: Analyzing trace with hash 57896921, now seen corresponding path program 270 times [2022-01-18 15:13:30,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:30,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624074113] [2022-01-18 15:13:30,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:30,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:30,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:30,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624074113] [2022-01-18 15:13:30,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624074113] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:30,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799292866] [2022-01-18 15:13:30,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:13:30,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:30,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:30,251 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:30,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-01-18 15:13:30,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:13:30,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:30,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:30,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:30,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:30,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:30,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:30,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:30,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:30,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:13:30,527 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:30,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:30,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799292866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:30,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:30,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-18 15:13:30,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073640689] [2022-01-18 15:13:30,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:30,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:13:30,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:30,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:13:30,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:13:30,531 INFO L87 Difference]: Start difference. First operand 554 states and 1772 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:30,780 INFO L93 Difference]: Finished difference Result 987 states and 3036 transitions. [2022-01-18 15:13:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:13:30,781 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:30,782 INFO L225 Difference]: With dead ends: 987 [2022-01-18 15:13:30,782 INFO L226 Difference]: Without dead ends: 958 [2022-01-18 15:13:30,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:13:30,782 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:30,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 151 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:30,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-01-18 15:13:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 554. [2022-01-18 15:13:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 3.2043399638336347) internal successors, (1772), 553 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1772 transitions. [2022-01-18 15:13:30,790 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1772 transitions. Word has length 21 [2022-01-18 15:13:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:30,790 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1772 transitions. [2022-01-18 15:13:30,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1772 transitions. [2022-01-18 15:13:30,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:30,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:30,790 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:30,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:30,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:30,991 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:30,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:30,991 INFO L85 PathProgramCache]: Analyzing trace with hash -696625026, now seen corresponding path program 271 times [2022-01-18 15:13:30,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:30,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325648364] [2022-01-18 15:13:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:30,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:31,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:31,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325648364] [2022-01-18 15:13:31,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325648364] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:31,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944008420] [2022-01-18 15:13:31,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:13:31,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:31,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:31,076 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:31,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-01-18 15:13:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:31,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:31,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:31,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:31,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:31,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:31,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:31,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:31,360 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:31,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:31,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944008420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:31,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:31,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-18 15:13:31,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578564074] [2022-01-18 15:13:31,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:31,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:13:31,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:31,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:13:31,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:13:31,364 INFO L87 Difference]: Start difference. First operand 554 states and 1772 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:32,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:32,284 INFO L93 Difference]: Finished difference Result 1110 states and 3373 transitions. [2022-01-18 15:13:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:13:32,284 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:32,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:32,286 INFO L225 Difference]: With dead ends: 1110 [2022-01-18 15:13:32,286 INFO L226 Difference]: Without dead ends: 1091 [2022-01-18 15:13:32,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=1685, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:13:32,286 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 292 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:32,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 267 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:13:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2022-01-18 15:13:32,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 545. [2022-01-18 15:13:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.1838235294117645) internal successors, (1732), 544 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1732 transitions. [2022-01-18 15:13:32,294 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1732 transitions. Word has length 21 [2022-01-18 15:13:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:32,294 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1732 transitions. [2022-01-18 15:13:32,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:32,294 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1732 transitions. [2022-01-18 15:13:32,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:32,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:32,295 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:32,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-01-18 15:13:32,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:32,495 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:32,496 INFO L85 PathProgramCache]: Analyzing trace with hash -625167472, now seen corresponding path program 272 times [2022-01-18 15:13:32,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:32,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318696344] [2022-01-18 15:13:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:32,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:32,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:32,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318696344] [2022-01-18 15:13:32,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318696344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:32,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919210561] [2022-01-18 15:13:32,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:13:32,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:32,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:32,597 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:32,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-01-18 15:13:32,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:32,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:32,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:32,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:32,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:32,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:32,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:32,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:32,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:13:32,897 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:32,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:32,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919210561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:32,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:32,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-18 15:13:32,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866027362] [2022-01-18 15:13:32,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:32,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:13:32,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:32,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:13:32,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:13:32,901 INFO L87 Difference]: Start difference. First operand 545 states and 1732 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:33,243 INFO L93 Difference]: Finished difference Result 861 states and 2645 transitions. [2022-01-18 15:13:33,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:13:33,243 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:33,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:33,245 INFO L225 Difference]: With dead ends: 861 [2022-01-18 15:13:33,245 INFO L226 Difference]: Without dead ends: 842 [2022-01-18 15:13:33,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:13:33,245 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 100 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:33,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 195 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:33,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-01-18 15:13:33,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 541. [2022-01-18 15:13:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 3.185185185185185) internal successors, (1720), 540 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1720 transitions. [2022-01-18 15:13:33,252 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1720 transitions. Word has length 21 [2022-01-18 15:13:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:33,252 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1720 transitions. [2022-01-18 15:13:33,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1720 transitions. [2022-01-18 15:13:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:33,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:33,253 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:33,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-01-18 15:13:33,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:33,453 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1388741071, now seen corresponding path program 273 times [2022-01-18 15:13:33,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:33,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475076284] [2022-01-18 15:13:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:33,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:33,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:33,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475076284] [2022-01-18 15:13:33,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475076284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:33,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623159040] [2022-01-18 15:13:33,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:13:33,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:33,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:33,540 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:33,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-01-18 15:13:33,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:13:33,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:33,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:33,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:33,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:33,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:33,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:33,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:33,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:13:33,872 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:33,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-01-18 15:13:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:33,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623159040] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:33,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:33,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-18 15:13:33,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626499164] [2022-01-18 15:13:33,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:33,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:13:33,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:33,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:13:33,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:13:33,876 INFO L87 Difference]: Start difference. First operand 541 states and 1720 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:34,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:34,283 INFO L93 Difference]: Finished difference Result 919 states and 2815 transitions. [2022-01-18 15:13:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:13:34,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:34,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:34,285 INFO L225 Difference]: With dead ends: 919 [2022-01-18 15:13:34,285 INFO L226 Difference]: Without dead ends: 886 [2022-01-18 15:13:34,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:13:34,285 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:34,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 208 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-18 15:13:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 548. [2022-01-18 15:13:34,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.1828153564899453) internal successors, (1741), 547 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1741 transitions. [2022-01-18 15:13:34,292 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1741 transitions. Word has length 21 [2022-01-18 15:13:34,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:34,292 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 1741 transitions. [2022-01-18 15:13:34,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1741 transitions. [2022-01-18 15:13:34,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:34,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:34,293 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:34,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-01-18 15:13:34,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:34,493 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:34,493 INFO L85 PathProgramCache]: Analyzing trace with hash 636286279, now seen corresponding path program 274 times [2022-01-18 15:13:34,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:34,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692364997] [2022-01-18 15:13:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:34,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:34,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:34,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692364997] [2022-01-18 15:13:34,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692364997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:34,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64437637] [2022-01-18 15:13:34,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:13:34,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:34,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:34,570 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:34,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-01-18 15:13:34,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:13:34,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:34,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:34,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:34,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:34,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:34,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:34,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:34,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:13:34,831 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:34,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:34,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64437637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:34,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:34,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-18 15:13:34,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395714407] [2022-01-18 15:13:34,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:34,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:13:34,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:34,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:13:34,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:13:34,836 INFO L87 Difference]: Start difference. First operand 548 states and 1741 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:35,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:35,106 INFO L93 Difference]: Finished difference Result 821 states and 2529 transitions. [2022-01-18 15:13:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:13:35,106 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:35,108 INFO L225 Difference]: With dead ends: 821 [2022-01-18 15:13:35,108 INFO L226 Difference]: Without dead ends: 799 [2022-01-18 15:13:35,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:13:35,108 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 73 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:35,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 157 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:35,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-01-18 15:13:35,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 548. [2022-01-18 15:13:35,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.1828153564899453) internal successors, (1741), 547 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1741 transitions. [2022-01-18 15:13:35,114 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1741 transitions. Word has length 21 [2022-01-18 15:13:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:35,115 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 1741 transitions. [2022-01-18 15:13:35,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1741 transitions. [2022-01-18 15:13:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:35,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:35,115 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:35,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-01-18 15:13:35,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:35,316 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:35,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:35,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1422340299, now seen corresponding path program 275 times [2022-01-18 15:13:35,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:35,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672469229] [2022-01-18 15:13:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:35,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:35,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:35,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672469229] [2022-01-18 15:13:35,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672469229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:35,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617780231] [2022-01-18 15:13:35,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:13:35,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:35,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:35,401 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:35,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-01-18 15:13:35,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:35,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:35,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:35,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:35,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:35,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:35,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:35,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:35,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:13:35,736 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:35,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-01-18 15:13:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:35,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617780231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:35,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:35,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-18 15:13:35,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407664406] [2022-01-18 15:13:35,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:35,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:13:35,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:13:35,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:13:35,740 INFO L87 Difference]: Start difference. First operand 548 states and 1741 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:36,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:36,086 INFO L93 Difference]: Finished difference Result 934 states and 2855 transitions. [2022-01-18 15:13:36,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:13:36,086 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:36,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:36,088 INFO L225 Difference]: With dead ends: 934 [2022-01-18 15:13:36,088 INFO L226 Difference]: Without dead ends: 907 [2022-01-18 15:13:36,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:13:36,088 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 116 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:36,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 153 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-18 15:13:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 549. [2022-01-18 15:13:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 3.187956204379562) internal successors, (1747), 548 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1747 transitions. [2022-01-18 15:13:36,095 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1747 transitions. Word has length 21 [2022-01-18 15:13:36,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:36,095 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1747 transitions. [2022-01-18 15:13:36,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:36,095 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1747 transitions. [2022-01-18 15:13:36,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:36,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:36,096 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:36,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:36,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2022-01-18 15:13:36,296 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:36,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:36,296 INFO L85 PathProgramCache]: Analyzing trace with hash 566783571, now seen corresponding path program 276 times [2022-01-18 15:13:36,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:36,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783806896] [2022-01-18 15:13:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:36,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:36,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:36,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783806896] [2022-01-18 15:13:36,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783806896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:36,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164876877] [2022-01-18 15:13:36,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:13:36,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:36,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:36,376 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:36,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-01-18 15:13:36,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:13:36,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:36,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:36,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:36,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:36,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:36,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:36,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:36,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:36,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:13:36,666 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:36,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:36,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164876877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:36,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:36,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-18 15:13:36,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150089423] [2022-01-18 15:13:36,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:36,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:13:36,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:36,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:13:36,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:13:36,671 INFO L87 Difference]: Start difference. First operand 549 states and 1747 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:36,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:36,911 INFO L93 Difference]: Finished difference Result 871 states and 2675 transitions. [2022-01-18 15:13:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:13:36,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:36,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:36,912 INFO L225 Difference]: With dead ends: 871 [2022-01-18 15:13:36,912 INFO L226 Difference]: Without dead ends: 842 [2022-01-18 15:13:36,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:13:36,913 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 79 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:36,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 150 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:36,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-01-18 15:13:36,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 544. [2022-01-18 15:13:36,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.18232044198895) internal successors, (1728), 543 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1728 transitions. [2022-01-18 15:13:36,919 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1728 transitions. Word has length 21 [2022-01-18 15:13:36,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:36,919 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 1728 transitions. [2022-01-18 15:13:36,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:36,919 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1728 transitions. [2022-01-18 15:13:36,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:36,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:36,920 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:36,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-01-18 15:13:37,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-01-18 15:13:37,121 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:37,121 INFO L85 PathProgramCache]: Analyzing trace with hash -765842877, now seen corresponding path program 277 times [2022-01-18 15:13:37,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:37,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220802602] [2022-01-18 15:13:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:37,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:37,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:37,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220802602] [2022-01-18 15:13:37,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220802602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:37,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824639589] [2022-01-18 15:13:37,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:13:37,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:37,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:37,207 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:37,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-01-18 15:13:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:37,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:37,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:37,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:37,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:37,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:37,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:37,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:37,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:13:37,543 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:37,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-01-18 15:13:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:37,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824639589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:37,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:37,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-18 15:13:37,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292458304] [2022-01-18 15:13:37,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:37,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:13:37,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:37,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:13:37,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:13:37,547 INFO L87 Difference]: Start difference. First operand 544 states and 1728 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:37,941 INFO L93 Difference]: Finished difference Result 992 states and 3022 transitions. [2022-01-18 15:13:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:13:37,941 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:37,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:37,943 INFO L225 Difference]: With dead ends: 992 [2022-01-18 15:13:37,943 INFO L226 Difference]: Without dead ends: 965 [2022-01-18 15:13:37,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:13:37,943 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 129 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:37,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 165 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-01-18 15:13:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 564. [2022-01-18 15:13:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 3.2007104795737122) internal successors, (1802), 563 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:37,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1802 transitions. [2022-01-18 15:13:37,950 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1802 transitions. Word has length 21 [2022-01-18 15:13:37,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:37,951 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 1802 transitions. [2022-01-18 15:13:37,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:37,951 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1802 transitions. [2022-01-18 15:13:37,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:37,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:37,951 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:37,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-01-18 15:13:38,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-01-18 15:13:38,152 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:38,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:38,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1621399605, now seen corresponding path program 278 times [2022-01-18 15:13:38,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:38,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974298215] [2022-01-18 15:13:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:38,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:38,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:38,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974298215] [2022-01-18 15:13:38,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974298215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:38,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352981403] [2022-01-18 15:13:38,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:13:38,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:38,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:38,230 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:38,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-01-18 15:13:38,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:38,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:38,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:38,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:38,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:38,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:13:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:38,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:38,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:38,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:13:38,508 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:38,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:38,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352981403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:38,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:38,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:13:38,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251033453] [2022-01-18 15:13:38,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:38,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:13:38,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:38,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:13:38,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:13:38,512 INFO L87 Difference]: Start difference. First operand 564 states and 1802 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:38,735 INFO L93 Difference]: Finished difference Result 850 states and 2621 transitions. [2022-01-18 15:13:38,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:13:38,735 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:38,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:38,736 INFO L225 Difference]: With dead ends: 850 [2022-01-18 15:13:38,736 INFO L226 Difference]: Without dead ends: 814 [2022-01-18 15:13:38,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:13:38,736 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:38,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 126 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:38,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-18 15:13:38,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 565. [2022-01-18 15:13:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.200354609929078) internal successors, (1805), 564 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 1805 transitions. [2022-01-18 15:13:38,743 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 1805 transitions. Word has length 21 [2022-01-18 15:13:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:38,743 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 1805 transitions. [2022-01-18 15:13:38,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:38,743 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 1805 transitions. [2022-01-18 15:13:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:38,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:38,744 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:38,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-01-18 15:13:38,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-01-18 15:13:38,944 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:38,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:38,945 INFO L85 PathProgramCache]: Analyzing trace with hash -835345585, now seen corresponding path program 279 times [2022-01-18 15:13:38,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:38,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484016919] [2022-01-18 15:13:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:38,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:39,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:39,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484016919] [2022-01-18 15:13:39,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484016919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:39,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670337240] [2022-01-18 15:13:39,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:13:39,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:39,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:39,034 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:39,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-01-18 15:13:39,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:13:39,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:39,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:39,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:39,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:39,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:39,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:39,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:39,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:13:39,391 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:39,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-01-18 15:13:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:39,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670337240] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:39,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:39,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:13:39,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361525603] [2022-01-18 15:13:39,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:39,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:13:39,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:39,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:13:39,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:13:39,396 INFO L87 Difference]: Start difference. First operand 565 states and 1805 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:39,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:39,772 INFO L93 Difference]: Finished difference Result 938 states and 2854 transitions. [2022-01-18 15:13:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:13:39,772 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:39,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:39,774 INFO L225 Difference]: With dead ends: 938 [2022-01-18 15:13:39,774 INFO L226 Difference]: Without dead ends: 917 [2022-01-18 15:13:39,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:13:39,774 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 119 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:39,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 191 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-01-18 15:13:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 553. [2022-01-18 15:13:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 3.193840579710145) internal successors, (1763), 552 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1763 transitions. [2022-01-18 15:13:39,781 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1763 transitions. Word has length 21 [2022-01-18 15:13:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:39,781 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 1763 transitions. [2022-01-18 15:13:39,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1763 transitions. [2022-01-18 15:13:39,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:39,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:39,782 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:39,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-01-18 15:13:39,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2022-01-18 15:13:39,982 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:39,983 INFO L85 PathProgramCache]: Analyzing trace with hash -922273744, now seen corresponding path program 280 times [2022-01-18 15:13:39,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:39,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501497735] [2022-01-18 15:13:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:39,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:40,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:40,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501497735] [2022-01-18 15:13:40,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501497735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:40,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560197986] [2022-01-18 15:13:40,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:13:40,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:40,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:40,081 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:40,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-01-18 15:13:40,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:13:40,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:40,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:40,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:40,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:40,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:40,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:40,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:40,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:13:40,437 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:40,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:40,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560197986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:40,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:40,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:13:40,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697660075] [2022-01-18 15:13:40,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:40,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:13:40,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:40,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:13:40,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:13:40,442 INFO L87 Difference]: Start difference. First operand 553 states and 1763 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:40,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:40,776 INFO L93 Difference]: Finished difference Result 799 states and 2469 transitions. [2022-01-18 15:13:40,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:13:40,776 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:40,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:40,778 INFO L225 Difference]: With dead ends: 799 [2022-01-18 15:13:40,778 INFO L226 Difference]: Without dead ends: 780 [2022-01-18 15:13:40,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:13:40,778 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 84 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:40,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 204 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-01-18 15:13:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 549. [2022-01-18 15:13:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 3.1952554744525545) internal successors, (1751), 548 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1751 transitions. [2022-01-18 15:13:40,785 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1751 transitions. Word has length 21 [2022-01-18 15:13:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:40,785 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1751 transitions. [2022-01-18 15:13:40,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1751 transitions. [2022-01-18 15:13:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:40,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:40,786 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:40,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-01-18 15:13:40,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:40,986 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:40,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1573862704, now seen corresponding path program 281 times [2022-01-18 15:13:40,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:40,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277594236] [2022-01-18 15:13:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:40,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:41,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:41,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277594236] [2022-01-18 15:13:41,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277594236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:41,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63239514] [2022-01-18 15:13:41,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:13:41,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:41,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:41,107 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:41,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-01-18 15:13:41,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:13:41,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:41,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:13:41,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:41,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:41,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:41,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:41,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:41,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:41,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-18 15:13:41,757 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:41,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 15:13:41,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:41,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63239514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:41,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:41,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-01-18 15:13:41,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701819229] [2022-01-18 15:13:41,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:41,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:13:41,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:41,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:13:41,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:13:41,762 INFO L87 Difference]: Start difference. First operand 549 states and 1751 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:42,734 INFO L93 Difference]: Finished difference Result 1099 states and 3319 transitions. [2022-01-18 15:13:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:13:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:42,736 INFO L225 Difference]: With dead ends: 1099 [2022-01-18 15:13:42,736 INFO L226 Difference]: Without dead ends: 1030 [2022-01-18 15:13:42,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=293, Invalid=1429, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:13:42,736 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 206 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:42,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 334 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:13:42,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-01-18 15:13:42,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 584. [2022-01-18 15:13:42,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 3.234991423670669) internal successors, (1886), 583 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1886 transitions. [2022-01-18 15:13:42,744 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1886 transitions. Word has length 21 [2022-01-18 15:13:42,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:42,744 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1886 transitions. [2022-01-18 15:13:42,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:42,744 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1886 transitions. [2022-01-18 15:13:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:42,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:42,744 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:42,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-01-18 15:13:42,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-01-18 15:13:42,945 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1677372858, now seen corresponding path program 282 times [2022-01-18 15:13:42,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:42,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702944928] [2022-01-18 15:13:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:42,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:43,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:43,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702944928] [2022-01-18 15:13:43,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702944928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:43,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64813802] [2022-01-18 15:13:43,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:13:43,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:43,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:43,056 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:43,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-01-18 15:13:43,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:13:43,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:43,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:43,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:43,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:43,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:43,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:43,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:43,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:13:43,454 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:43,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:43,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64813802] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:43,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:43,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:13:43,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084717391] [2022-01-18 15:13:43,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:43,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:13:43,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:43,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:13:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:13:43,459 INFO L87 Difference]: Start difference. First operand 584 states and 1886 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:43,750 INFO L93 Difference]: Finished difference Result 827 states and 2566 transitions. [2022-01-18 15:13:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:13:43,750 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:43,751 INFO L225 Difference]: With dead ends: 827 [2022-01-18 15:13:43,751 INFO L226 Difference]: Without dead ends: 808 [2022-01-18 15:13:43,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:13:43,752 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:43,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 143 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-01-18 15:13:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 578. [2022-01-18 15:13:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 3.221837088388215) internal successors, (1859), 577 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1859 transitions. [2022-01-18 15:13:43,759 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1859 transitions. Word has length 21 [2022-01-18 15:13:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:43,759 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1859 transitions. [2022-01-18 15:13:43,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:43,759 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1859 transitions. [2022-01-18 15:13:43,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:43,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:43,759 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:43,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-01-18 15:13:43,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2022-01-18 15:13:43,960 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:43,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1294875755, now seen corresponding path program 283 times [2022-01-18 15:13:43,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:43,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344430686] [2022-01-18 15:13:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:43,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:44,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:44,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344430686] [2022-01-18 15:13:44,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344430686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:44,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378082156] [2022-01-18 15:13:44,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:13:44,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:44,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:44,043 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:44,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-01-18 15:13:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:44,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:44,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:44,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:44,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:44,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:44,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:44,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:13:44,389 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:44,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-01-18 15:13:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:44,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378082156] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:44,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:44,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:13:44,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41347937] [2022-01-18 15:13:44,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:44,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:13:44,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:44,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:13:44,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:13:44,393 INFO L87 Difference]: Start difference. First operand 578 states and 1859 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:44,929 INFO L93 Difference]: Finished difference Result 1067 states and 3277 transitions. [2022-01-18 15:13:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:13:44,929 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:44,931 INFO L225 Difference]: With dead ends: 1067 [2022-01-18 15:13:44,931 INFO L226 Difference]: Without dead ends: 1034 [2022-01-18 15:13:44,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:13:44,931 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 131 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:44,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 232 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:44,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-01-18 15:13:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 593. [2022-01-18 15:13:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.2179054054054053) internal successors, (1905), 592 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1905 transitions. [2022-01-18 15:13:44,939 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1905 transitions. Word has length 21 [2022-01-18 15:13:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:44,939 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1905 transitions. [2022-01-18 15:13:44,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1905 transitions. [2022-01-18 15:13:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:44,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:44,940 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:44,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-01-18 15:13:45,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:45,141 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:45,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:45,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2047330547, now seen corresponding path program 284 times [2022-01-18 15:13:45,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:45,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748756618] [2022-01-18 15:13:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:45,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:45,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:45,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748756618] [2022-01-18 15:13:45,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748756618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:45,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70380173] [2022-01-18 15:13:45,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:13:45,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:45,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:45,212 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:45,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-01-18 15:13:45,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:45,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:45,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:45,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:45,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:45,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:45,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:45,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:45,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:13:45,455 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:45,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:45,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70380173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:45,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:45,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-18 15:13:45,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36938919] [2022-01-18 15:13:45,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:45,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:13:45,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:45,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:13:45,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:13:45,459 INFO L87 Difference]: Start difference. First operand 593 states and 1905 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:45,715 INFO L93 Difference]: Finished difference Result 851 states and 2650 transitions. [2022-01-18 15:13:45,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:13:45,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:45,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:45,717 INFO L225 Difference]: With dead ends: 851 [2022-01-18 15:13:45,717 INFO L226 Difference]: Without dead ends: 829 [2022-01-18 15:13:45,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:13:45,717 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:45,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 135 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-18 15:13:45,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 593. [2022-01-18 15:13:45,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.2179054054054053) internal successors, (1905), 592 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1905 transitions. [2022-01-18 15:13:45,730 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1905 transitions. Word has length 21 [2022-01-18 15:13:45,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:45,731 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1905 transitions. [2022-01-18 15:13:45,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1905 transitions. [2022-01-18 15:13:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:45,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:45,731 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:45,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-01-18 15:13:45,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:45,932 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:45,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1261276527, now seen corresponding path program 285 times [2022-01-18 15:13:45,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:45,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588892831] [2022-01-18 15:13:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:45,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:46,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:46,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588892831] [2022-01-18 15:13:46,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588892831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:46,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497008294] [2022-01-18 15:13:46,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:13:46,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:46,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:46,025 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:46,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-01-18 15:13:46,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:13:46,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:46,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:46,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:46,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:46,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:46,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:46,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:46,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:13:46,353 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:46,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-01-18 15:13:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:46,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497008294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:46,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:46,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:13:46,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470634050] [2022-01-18 15:13:46,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:46,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:13:46,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:46,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:13:46,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:13:46,357 INFO L87 Difference]: Start difference. First operand 593 states and 1905 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:46,960 INFO L93 Difference]: Finished difference Result 1059 states and 3241 transitions. [2022-01-18 15:13:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:13:46,960 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:46,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:46,962 INFO L225 Difference]: With dead ends: 1059 [2022-01-18 15:13:46,962 INFO L226 Difference]: Without dead ends: 1032 [2022-01-18 15:13:46,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:13:46,963 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 111 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:46,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 259 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:46,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-01-18 15:13:46,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 593. [2022-01-18 15:13:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.2179054054054053) internal successors, (1905), 592 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1905 transitions. [2022-01-18 15:13:46,970 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1905 transitions. Word has length 21 [2022-01-18 15:13:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:46,970 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1905 transitions. [2022-01-18 15:13:46,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1905 transitions. [2022-01-18 15:13:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:46,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:46,971 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:46,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-01-18 15:13:47,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:47,172 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:47,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2116833255, now seen corresponding path program 286 times [2022-01-18 15:13:47,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:47,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773961695] [2022-01-18 15:13:47,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:47,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:47,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:47,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773961695] [2022-01-18 15:13:47,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773961695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:47,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468146666] [2022-01-18 15:13:47,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:13:47,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:47,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:47,246 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:47,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-01-18 15:13:47,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:13:47,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:47,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:47,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:47,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:47,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:47,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:47,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:47,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:47,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:13:47,497 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:47,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:47,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468146666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:47,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:47,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-18 15:13:47,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269880020] [2022-01-18 15:13:47,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:47,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:13:47,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:47,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:13:47,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:13:47,501 INFO L87 Difference]: Start difference. First operand 593 states and 1905 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:47,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:47,760 INFO L93 Difference]: Finished difference Result 902 states and 2806 transitions. [2022-01-18 15:13:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:13:47,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:47,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:47,762 INFO L225 Difference]: With dead ends: 902 [2022-01-18 15:13:47,762 INFO L226 Difference]: Without dead ends: 873 [2022-01-18 15:13:47,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:13:47,762 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 87 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:47,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 149 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:47,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-01-18 15:13:47,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 591. [2022-01-18 15:13:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.2254237288135594) internal successors, (1903), 590 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1903 transitions. [2022-01-18 15:13:47,769 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1903 transitions. Word has length 21 [2022-01-18 15:13:47,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:47,769 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 1903 transitions. [2022-01-18 15:13:47,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:47,769 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1903 transitions. [2022-01-18 15:13:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:47,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:47,770 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:47,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-01-18 15:13:47,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:47,970 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:47,971 INFO L85 PathProgramCache]: Analyzing trace with hash 845507593, now seen corresponding path program 287 times [2022-01-18 15:13:47,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:47,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073091669] [2022-01-18 15:13:47,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:47,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:48,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:48,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073091669] [2022-01-18 15:13:48,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073091669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:48,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019194482] [2022-01-18 15:13:48,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:13:48,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:48,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:48,056 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:48,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-01-18 15:13:48,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:13:48,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:48,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:48,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:48,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:48,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:48,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:48,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:48,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:48,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:13:48,390 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:48,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-01-18 15:13:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:48,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019194482] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:48,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:48,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:13:48,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270472404] [2022-01-18 15:13:48,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:48,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:13:48,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:48,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:13:48,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:13:48,394 INFO L87 Difference]: Start difference. First operand 591 states and 1903 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:48,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:48,969 INFO L93 Difference]: Finished difference Result 1117 states and 3410 transitions. [2022-01-18 15:13:48,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:13:48,970 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:48,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:48,971 INFO L225 Difference]: With dead ends: 1117 [2022-01-18 15:13:48,971 INFO L226 Difference]: Without dead ends: 1090 [2022-01-18 15:13:48,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=848, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:13:48,971 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 128 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:48,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 242 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:48,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-01-18 15:13:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 611. [2022-01-18 15:13:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 3.240983606557377) internal successors, (1977), 610 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1977 transitions. [2022-01-18 15:13:48,980 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1977 transitions. Word has length 21 [2022-01-18 15:13:48,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:48,980 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 1977 transitions. [2022-01-18 15:13:48,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:48,980 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1977 transitions. [2022-01-18 15:13:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:48,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:48,981 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:48,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-01-18 15:13:49,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-01-18 15:13:49,181 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:49,181 INFO L85 PathProgramCache]: Analyzing trace with hash -10049135, now seen corresponding path program 288 times [2022-01-18 15:13:49,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:49,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103499884] [2022-01-18 15:13:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:49,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:49,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:49,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103499884] [2022-01-18 15:13:49,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103499884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:49,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614417602] [2022-01-18 15:13:49,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:13:49,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:49,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:49,253 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:49,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-01-18 15:13:49,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:13:49,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:49,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:49,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:49,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:49,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:13:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:49,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:49,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:49,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:13:49,519 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:49,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:49,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614417602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:49,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:49,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:13:49,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458673988] [2022-01-18 15:13:49,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:49,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:13:49,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:49,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:13:49,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:13:49,523 INFO L87 Difference]: Start difference. First operand 611 states and 1977 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:49,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:49,859 INFO L93 Difference]: Finished difference Result 885 states and 2764 transitions. [2022-01-18 15:13:49,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:13:49,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:49,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:49,860 INFO L225 Difference]: With dead ends: 885 [2022-01-18 15:13:49,860 INFO L226 Difference]: Without dead ends: 849 [2022-01-18 15:13:49,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:13:49,860 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:49,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 214 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:49,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-01-18 15:13:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 611. [2022-01-18 15:13:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 3.236065573770492) internal successors, (1974), 610 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1974 transitions. [2022-01-18 15:13:49,867 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1974 transitions. Word has length 21 [2022-01-18 15:13:49,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:49,867 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 1974 transitions. [2022-01-18 15:13:49,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:49,867 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1974 transitions. [2022-01-18 15:13:49,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:49,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:49,868 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:49,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-01-18 15:13:50,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:50,069 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:50,069 INFO L85 PathProgramCache]: Analyzing trace with hash 776004885, now seen corresponding path program 289 times [2022-01-18 15:13:50,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:50,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381062704] [2022-01-18 15:13:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:50,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:50,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:50,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381062704] [2022-01-18 15:13:50,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381062704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:50,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036870478] [2022-01-18 15:13:50,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:13:50,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:50,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:50,151 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:50,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-01-18 15:13:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:50,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:50,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:50,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:50,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:50,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:50,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:50,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:13:50,477 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:50,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-01-18 15:13:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:50,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036870478] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:50,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:50,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:13:50,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391836273] [2022-01-18 15:13:50,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:50,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:13:50,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:50,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:13:50,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:13:50,481 INFO L87 Difference]: Start difference. First operand 611 states and 1974 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:50,919 INFO L93 Difference]: Finished difference Result 1018 states and 3128 transitions. [2022-01-18 15:13:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:13:50,919 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:50,920 INFO L225 Difference]: With dead ends: 1018 [2022-01-18 15:13:50,921 INFO L226 Difference]: Without dead ends: 997 [2022-01-18 15:13:50,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:13:50,921 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 107 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:50,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 209 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:50,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-01-18 15:13:50,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 589. [2022-01-18 15:13:50,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 3.2312925170068025) internal successors, (1900), 588 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1900 transitions. [2022-01-18 15:13:50,929 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1900 transitions. Word has length 21 [2022-01-18 15:13:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:50,929 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 1900 transitions. [2022-01-18 15:13:50,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:50,929 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1900 transitions. [2022-01-18 15:13:50,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:50,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:50,930 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:50,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-01-18 15:13:51,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-01-18 15:13:51,130 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:51,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:51,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1288406733, now seen corresponding path program 290 times [2022-01-18 15:13:51,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:51,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910977496] [2022-01-18 15:13:51,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:51,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:51,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:51,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910977496] [2022-01-18 15:13:51,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910977496] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:51,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978713904] [2022-01-18 15:13:51,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:13:51,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:51,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:51,215 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:51,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-01-18 15:13:51,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:51,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:51,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:51,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:51,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:51,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:51,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:51,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:51,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:51,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:51,534 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:51,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-01-18 15:13:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:51,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978713904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:51,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:51,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:13:51,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282564818] [2022-01-18 15:13:51,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:51,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:13:51,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:51,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:13:51,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:13:51,538 INFO L87 Difference]: Start difference. First operand 589 states and 1900 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:52,234 INFO L93 Difference]: Finished difference Result 1271 states and 3866 transitions. [2022-01-18 15:13:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:13:52,234 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:52,236 INFO L225 Difference]: With dead ends: 1271 [2022-01-18 15:13:52,236 INFO L226 Difference]: Without dead ends: 1244 [2022-01-18 15:13:52,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:13:52,236 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:52,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 333 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:13:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2022-01-18 15:13:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 623. [2022-01-18 15:13:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 3.2636655948553055) internal successors, (2030), 622 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2030 transitions. [2022-01-18 15:13:52,245 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2030 transitions. Word has length 21 [2022-01-18 15:13:52,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:52,245 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 2030 transitions. [2022-01-18 15:13:52,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2030 transitions. [2022-01-18 15:13:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:52,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:52,246 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:52,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-01-18 15:13:52,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-01-18 15:13:52,446 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:52,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:52,447 INFO L85 PathProgramCache]: Analyzing trace with hash 432850005, now seen corresponding path program 291 times [2022-01-18 15:13:52,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:52,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143695760] [2022-01-18 15:13:52,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:52,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:52,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:52,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143695760] [2022-01-18 15:13:52,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143695760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:52,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839917246] [2022-01-18 15:13:52,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:13:52,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:52,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:52,517 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:52,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-01-18 15:13:52,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:13:52,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:52,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:52,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:52,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:52,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:13:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:52,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:52,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:52,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:13:52,783 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:52,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:52,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839917246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:52,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:52,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:13:52,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156664535] [2022-01-18 15:13:52,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:52,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:13:52,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:52,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:13:52,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:13:52,788 INFO L87 Difference]: Start difference. First operand 623 states and 2030 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:53,063 INFO L93 Difference]: Finished difference Result 999 states and 3108 transitions. [2022-01-18 15:13:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:13:53,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:53,064 INFO L225 Difference]: With dead ends: 999 [2022-01-18 15:13:53,064 INFO L226 Difference]: Without dead ends: 952 [2022-01-18 15:13:53,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:13:53,065 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 112 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:53,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 161 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:13:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-01-18 15:13:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 623. [2022-01-18 15:13:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 3.2508038585209005) internal successors, (2022), 622 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:53,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2022 transitions. [2022-01-18 15:13:53,072 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2022 transitions. Word has length 21 [2022-01-18 15:13:53,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:53,072 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 2022 transitions. [2022-01-18 15:13:53,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:53,073 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2022 transitions. [2022-01-18 15:13:53,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:53,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:53,073 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:53,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-01-18 15:13:53,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-01-18 15:13:53,274 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:53,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1218904025, now seen corresponding path program 292 times [2022-01-18 15:13:53,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:53,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427720761] [2022-01-18 15:13:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:53,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:53,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:53,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427720761] [2022-01-18 15:13:53,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427720761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:53,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965035701] [2022-01-18 15:13:53,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:13:53,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:53,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:53,353 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:53,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-01-18 15:13:53,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:13:53,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:53,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:53,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:53,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:53,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:53,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:53,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:53,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:53,661 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:53,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-01-18 15:13:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:53,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965035701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:53,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:53,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:13:53,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846994707] [2022-01-18 15:13:53,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:53,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:13:53,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:53,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:13:53,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:13:53,665 INFO L87 Difference]: Start difference. First operand 623 states and 2022 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:54,120 INFO L93 Difference]: Finished difference Result 1176 states and 3600 transitions. [2022-01-18 15:13:54,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:13:54,121 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:54,122 INFO L225 Difference]: With dead ends: 1176 [2022-01-18 15:13:54,122 INFO L226 Difference]: Without dead ends: 1155 [2022-01-18 15:13:54,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:13:54,123 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 145 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:54,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 214 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-01-18 15:13:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 619. [2022-01-18 15:13:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 3.250809061488673) internal successors, (2009), 618 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:54,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 2009 transitions. [2022-01-18 15:13:54,131 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 2009 transitions. Word has length 21 [2022-01-18 15:13:54,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:54,131 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 2009 transitions. [2022-01-18 15:13:54,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:54,132 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 2009 transitions. [2022-01-18 15:13:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:54,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:54,132 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:54,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:54,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-01-18 15:13:54,333 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:54,333 INFO L85 PathProgramCache]: Analyzing trace with hash 124812437, now seen corresponding path program 293 times [2022-01-18 15:13:54,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:54,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63489798] [2022-01-18 15:13:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:54,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:54,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:54,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63489798] [2022-01-18 15:13:54,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63489798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:54,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932051274] [2022-01-18 15:13:54,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:13:54,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:54,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:54,410 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:54,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-01-18 15:13:54,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:13:54,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:54,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:13:54,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:54,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:54,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:54,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:54,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:54,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:13:54,776 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:54,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 15:13:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:54,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932051274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:54,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:54,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:13:54,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792438150] [2022-01-18 15:13:54,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:54,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:13:54,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:54,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:13:54,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:13:54,780 INFO L87 Difference]: Start difference. First operand 619 states and 2009 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:55,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:55,702 INFO L93 Difference]: Finished difference Result 1417 states and 4273 transitions. [2022-01-18 15:13:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:13:55,702 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:55,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:55,704 INFO L225 Difference]: With dead ends: 1417 [2022-01-18 15:13:55,704 INFO L226 Difference]: Without dead ends: 1312 [2022-01-18 15:13:55,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=1212, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:13:55,704 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 188 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:55,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 348 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:13:55,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2022-01-18 15:13:55,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 616. [2022-01-18 15:13:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 3.2585365853658534) internal successors, (2004), 615 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 2004 transitions. [2022-01-18 15:13:55,714 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 2004 transitions. Word has length 21 [2022-01-18 15:13:55,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:55,714 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 2004 transitions. [2022-01-18 15:13:55,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:55,714 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 2004 transitions. [2022-01-18 15:13:55,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:55,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:55,715 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:55,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-01-18 15:13:55,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:55,915 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:55,915 INFO L85 PathProgramCache]: Analyzing trace with hash 978491404, now seen corresponding path program 294 times [2022-01-18 15:13:55,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:55,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984914620] [2022-01-18 15:13:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:55,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:56,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:56,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984914620] [2022-01-18 15:13:56,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984914620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:56,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891052354] [2022-01-18 15:13:56,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:13:56,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:56,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:56,024 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:56,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-01-18 15:13:56,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:13:56,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:56,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:56,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:56,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:56,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:56,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:56,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:56,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:56,416 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:56,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:56,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891052354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:56,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:56,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:13:56,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8366264] [2022-01-18 15:13:56,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:56,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:13:56,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:56,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:13:56,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:13:56,421 INFO L87 Difference]: Start difference. First operand 616 states and 2004 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:56,949 INFO L93 Difference]: Finished difference Result 996 states and 3121 transitions. [2022-01-18 15:13:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:13:56,950 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:56,951 INFO L225 Difference]: With dead ends: 996 [2022-01-18 15:13:56,951 INFO L226 Difference]: Without dead ends: 977 [2022-01-18 15:13:56,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:13:56,951 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:56,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 240 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-01-18 15:13:56,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 628. [2022-01-18 15:13:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.2679425837320575) internal successors, (2049), 627 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2049 transitions. [2022-01-18 15:13:56,959 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2049 transitions. Word has length 21 [2022-01-18 15:13:56,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:56,959 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 2049 transitions. [2022-01-18 15:13:56,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:56,959 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2049 transitions. [2022-01-18 15:13:56,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:56,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:56,960 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:56,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:57,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-01-18 15:13:57,160 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:57,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:57,161 INFO L85 PathProgramCache]: Analyzing trace with hash -19571796, now seen corresponding path program 295 times [2022-01-18 15:13:57,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:57,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553136956] [2022-01-18 15:13:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:57,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:57,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:57,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553136956] [2022-01-18 15:13:57,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553136956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:57,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401781522] [2022-01-18 15:13:57,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:13:57,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:57,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:57,279 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:57,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-01-18 15:13:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:57,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:57,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:57,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:57,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:57,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:57,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:57,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:57,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:57,671 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:57,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:57,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401781522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:57,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:57,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:13:57,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895815622] [2022-01-18 15:13:57,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:57,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:13:57,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:57,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:13:57,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:13:57,676 INFO L87 Difference]: Start difference. First operand 628 states and 2049 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:58,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:58,223 INFO L93 Difference]: Finished difference Result 1079 states and 3363 transitions. [2022-01-18 15:13:58,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:13:58,223 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:58,225 INFO L225 Difference]: With dead ends: 1079 [2022-01-18 15:13:58,225 INFO L226 Difference]: Without dead ends: 1056 [2022-01-18 15:13:58,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:13:58,225 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 126 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:58,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 271 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:13:58,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-01-18 15:13:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 626. [2022-01-18 15:13:58,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.2704) internal successors, (2044), 625 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 2044 transitions. [2022-01-18 15:13:58,233 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 2044 transitions. Word has length 21 [2022-01-18 15:13:58,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:58,233 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 2044 transitions. [2022-01-18 15:13:58,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:58,233 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 2044 transitions. [2022-01-18 15:13:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:58,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:58,234 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:58,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-01-18 15:13:58,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:58,434 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:58,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:58,434 INFO L85 PathProgramCache]: Analyzing trace with hash 230550672, now seen corresponding path program 296 times [2022-01-18 15:13:58,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:58,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543485344] [2022-01-18 15:13:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:58,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:58,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:58,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543485344] [2022-01-18 15:13:58,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543485344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:58,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909641184] [2022-01-18 15:13:58,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:13:58,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:58,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:58,553 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:58,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-01-18 15:13:58,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:13:58,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:58,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:58,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:58,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:58,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:58,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:13:58,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:13:58,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:13:58,942 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:13:58,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:13:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:58,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909641184] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:13:58,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:13:58,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:13:58,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371977677] [2022-01-18 15:13:58,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:13:58,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:13:58,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:13:58,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:13:58,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:13:58,947 INFO L87 Difference]: Start difference. First operand 626 states and 2044 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:13:59,452 INFO L93 Difference]: Finished difference Result 939 states and 2956 transitions. [2022-01-18 15:13:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:13:59,453 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:13:59,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:13:59,454 INFO L225 Difference]: With dead ends: 939 [2022-01-18 15:13:59,454 INFO L226 Difference]: Without dead ends: 920 [2022-01-18 15:13:59,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:13:59,454 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 86 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:13:59,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 286 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:13:59,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-01-18 15:13:59,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 622. [2022-01-18 15:13:59,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 3.2657004830917873) internal successors, (2028), 621 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 2028 transitions. [2022-01-18 15:13:59,462 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 2028 transitions. Word has length 21 [2022-01-18 15:13:59,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:13:59,462 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 2028 transitions. [2022-01-18 15:13:59,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:13:59,462 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 2028 transitions. [2022-01-18 15:13:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:13:59,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:13:59,463 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:13:59,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Forceful destruction successful, exit code 0 [2022-01-18 15:13:59,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:59,664 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:13:59,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:13:59,665 INFO L85 PathProgramCache]: Analyzing trace with hash 207649584, now seen corresponding path program 297 times [2022-01-18 15:13:59,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:13:59,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135941611] [2022-01-18 15:13:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:13:59,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:13:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:13:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:59,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:13:59,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135941611] [2022-01-18 15:13:59,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135941611] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:13:59,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646965827] [2022-01-18 15:13:59,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:13:59,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:13:59,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:13:59,762 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:13:59,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-01-18 15:13:59,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:13:59,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:13:59,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:13:59,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:13:59,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:13:59,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:13:59,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:13:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:13:59,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:00,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:00,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:00,161 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:00,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:14:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:00,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646965827] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:00,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:00,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:14:00,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87155258] [2022-01-18 15:14:00,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:00,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:00,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:00,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:00,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:00,166 INFO L87 Difference]: Start difference. First operand 622 states and 2028 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:00,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:00,719 INFO L93 Difference]: Finished difference Result 1063 states and 3317 transitions. [2022-01-18 15:14:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:14:00,720 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:00,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:00,721 INFO L225 Difference]: With dead ends: 1063 [2022-01-18 15:14:00,721 INFO L226 Difference]: Without dead ends: 1040 [2022-01-18 15:14:00,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:14:00,722 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 117 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:00,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 234 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:00,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2022-01-18 15:14:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 624. [2022-01-18 15:14:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 3.2712680577849116) internal successors, (2038), 623 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 2038 transitions. [2022-01-18 15:14:00,730 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 2038 transitions. Word has length 21 [2022-01-18 15:14:00,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:00,730 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 2038 transitions. [2022-01-18 15:14:00,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:00,730 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 2038 transitions. [2022-01-18 15:14:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:00,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:00,731 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:00,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-01-18 15:14:00,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:00,931 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:00,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:00,932 INFO L85 PathProgramCache]: Analyzing trace with hash -107661118, now seen corresponding path program 298 times [2022-01-18 15:14:00,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:00,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510618254] [2022-01-18 15:14:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:00,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:01,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:01,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510618254] [2022-01-18 15:14:01,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510618254] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:01,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196701473] [2022-01-18 15:14:01,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:01,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:01,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:01,034 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:01,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-01-18 15:14:01,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:01,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:01,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:01,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:01,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:01,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:01,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:01,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:01,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:01,395 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:01,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:14:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:01,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196701473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:01,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:01,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:14:01,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141112993] [2022-01-18 15:14:01,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:01,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:01,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:01,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:01,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:01,401 INFO L87 Difference]: Start difference. First operand 624 states and 2038 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:01,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:01,837 INFO L93 Difference]: Finished difference Result 931 states and 2933 transitions. [2022-01-18 15:14:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:14:01,837 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:01,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:01,839 INFO L225 Difference]: With dead ends: 931 [2022-01-18 15:14:01,839 INFO L226 Difference]: Without dead ends: 912 [2022-01-18 15:14:01,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:14:01,839 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 91 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:01,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 225 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:01,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-01-18 15:14:01,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 632. [2022-01-18 15:14:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.2741679873217118) internal successors, (2066), 631 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2066 transitions. [2022-01-18 15:14:01,847 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2066 transitions. Word has length 21 [2022-01-18 15:14:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:01,847 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 2066 transitions. [2022-01-18 15:14:01,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2066 transitions. [2022-01-18 15:14:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:01,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:01,848 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:01,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-01-18 15:14:02,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:02,048 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:02,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2139951234, now seen corresponding path program 299 times [2022-01-18 15:14:02,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:02,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633603302] [2022-01-18 15:14:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:02,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:02,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:02,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633603302] [2022-01-18 15:14:02,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633603302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:02,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943126392] [2022-01-18 15:14:02,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:02,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:02,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:02,160 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:02,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-01-18 15:14:02,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:02,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:02,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:02,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:02,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:02,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:02,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:02,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:02,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:02,735 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:02,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 15:14:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:02,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943126392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:02,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:02,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-01-18 15:14:02,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109197613] [2022-01-18 15:14:02,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:02,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:14:02,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:02,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:14:02,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:14:02,740 INFO L87 Difference]: Start difference. First operand 632 states and 2066 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:03,455 INFO L93 Difference]: Finished difference Result 1052 states and 3265 transitions. [2022-01-18 15:14:03,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:14:03,456 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:03,457 INFO L225 Difference]: With dead ends: 1052 [2022-01-18 15:14:03,457 INFO L226 Difference]: Without dead ends: 995 [2022-01-18 15:14:03,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:14:03,457 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 111 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:03,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 307 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:14:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-01-18 15:14:03,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 640. [2022-01-18 15:14:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 3.276995305164319) internal successors, (2094), 639 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 2094 transitions. [2022-01-18 15:14:03,465 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 2094 transitions. Word has length 21 [2022-01-18 15:14:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:03,465 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 2094 transitions. [2022-01-18 15:14:03,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:03,466 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 2094 transitions. [2022-01-18 15:14:03,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:03,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:03,466 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:03,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-01-18 15:14:03,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:03,667 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:03,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1439864392, now seen corresponding path program 300 times [2022-01-18 15:14:03,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:03,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124159250] [2022-01-18 15:14:03,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:03,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:03,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:03,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124159250] [2022-01-18 15:14:03,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124159250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:03,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718408423] [2022-01-18 15:14:03,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:03,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:03,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:03,768 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:03,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-01-18 15:14:03,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:14:03,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:03,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:03,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:03,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:03,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:03,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:04,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:04,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:14:04,144 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:04,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:14:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:04,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718408423] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:04,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:04,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:14:04,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344978865] [2022-01-18 15:14:04,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:04,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:04,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:04,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:04,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:04,150 INFO L87 Difference]: Start difference. First operand 640 states and 2094 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:04,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:04,500 INFO L93 Difference]: Finished difference Result 854 states and 2716 transitions. [2022-01-18 15:14:04,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:14:04,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:04,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:04,502 INFO L225 Difference]: With dead ends: 854 [2022-01-18 15:14:04,502 INFO L226 Difference]: Without dead ends: 835 [2022-01-18 15:14:04,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:04,502 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 95 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:04,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 198 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:04,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-01-18 15:14:04,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 636. [2022-01-18 15:14:04,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 3.278740157480315) internal successors, (2082), 635 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:04,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 2082 transitions. [2022-01-18 15:14:04,510 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 2082 transitions. Word has length 21 [2022-01-18 15:14:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:04,510 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 2082 transitions. [2022-01-18 15:14:04,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:04,510 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 2082 transitions. [2022-01-18 15:14:04,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:04,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:04,510 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:04,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-01-18 15:14:04,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-01-18 15:14:04,711 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:04,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:04,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1056272056, now seen corresponding path program 301 times [2022-01-18 15:14:04,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:04,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624125708] [2022-01-18 15:14:04,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:04,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:04,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:04,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624125708] [2022-01-18 15:14:04,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624125708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:04,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941523360] [2022-01-18 15:14:04,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:04,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:04,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:04,820 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:04,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-01-18 15:14:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:04,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:04,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:04,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:04,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:04,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:05,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:05,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:05,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:14:05,208 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:05,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:14:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:05,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941523360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:05,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:05,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:14:05,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025084743] [2022-01-18 15:14:05,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:05,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:05,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:05,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:05,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:05,214 INFO L87 Difference]: Start difference. First operand 636 states and 2082 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:05,739 INFO L93 Difference]: Finished difference Result 978 states and 3072 transitions. [2022-01-18 15:14:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:14:05,739 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:05,741 INFO L225 Difference]: With dead ends: 978 [2022-01-18 15:14:05,741 INFO L226 Difference]: Without dead ends: 955 [2022-01-18 15:14:05,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:14:05,741 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:05,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 244 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-01-18 15:14:05,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 642. [2022-01-18 15:14:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.282371294851794) internal successors, (2104), 641 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:05,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2104 transitions. [2022-01-18 15:14:05,749 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2104 transitions. Word has length 21 [2022-01-18 15:14:05,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:05,749 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 2104 transitions. [2022-01-18 15:14:05,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:05,749 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2104 transitions. [2022-01-18 15:14:05,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:05,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:05,750 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:05,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:05,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-01-18 15:14:05,950 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:05,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:05,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1159782210, now seen corresponding path program 302 times [2022-01-18 15:14:05,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:05,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504903482] [2022-01-18 15:14:05,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:05,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:06,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:06,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504903482] [2022-01-18 15:14:06,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504903482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:06,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946410087] [2022-01-18 15:14:06,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:06,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:06,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:06,054 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:06,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-01-18 15:14:06,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:06,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:06,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:06,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:06,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:06,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:06,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:06,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:06,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:14:06,424 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:06,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:14:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:06,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946410087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:06,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:06,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:14:06,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873842871] [2022-01-18 15:14:06,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:06,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:06,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:06,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:06,429 INFO L87 Difference]: Start difference. First operand 642 states and 2104 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:06,753 INFO L93 Difference]: Finished difference Result 880 states and 2784 transitions. [2022-01-18 15:14:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:14:06,754 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:06,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:06,755 INFO L225 Difference]: With dead ends: 880 [2022-01-18 15:14:06,755 INFO L226 Difference]: Without dead ends: 861 [2022-01-18 15:14:06,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:06,755 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:06,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 175 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:06,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-18 15:14:06,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 642. [2022-01-18 15:14:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.282371294851794) internal successors, (2104), 641 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:06,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2104 transitions. [2022-01-18 15:14:06,763 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2104 transitions. Word has length 21 [2022-01-18 15:14:06,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:06,763 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 2104 transitions. [2022-01-18 15:14:06,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2104 transitions. [2022-01-18 15:14:06,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:06,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:06,764 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:06,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-01-18 15:14:06,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2022-01-18 15:14:06,964 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:06,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1314532268, now seen corresponding path program 303 times [2022-01-18 15:14:06,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:06,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371922092] [2022-01-18 15:14:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:06,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:07,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:07,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371922092] [2022-01-18 15:14:07,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371922092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:07,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367171638] [2022-01-18 15:14:07,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:07,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:07,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:07,051 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:07,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-01-18 15:14:07,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:14:07,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:07,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:07,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:07,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:07,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:07,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:07,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:07,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:07,376 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:07,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:14:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:07,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367171638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:07,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:07,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-18 15:14:07,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853015228] [2022-01-18 15:14:07,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:07,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:14:07,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:07,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:14:07,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:14:07,382 INFO L87 Difference]: Start difference. First operand 642 states and 2104 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:07,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:07,798 INFO L93 Difference]: Finished difference Result 976 states and 3088 transitions. [2022-01-18 15:14:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:14:07,798 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:07,800 INFO L225 Difference]: With dead ends: 976 [2022-01-18 15:14:07,800 INFO L226 Difference]: Without dead ends: 957 [2022-01-18 15:14:07,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:14:07,800 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 89 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:07,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 221 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:07,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-18 15:14:07,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 651. [2022-01-18 15:14:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 3.2753846153846156) internal successors, (2129), 650 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:07,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2129 transitions. [2022-01-18 15:14:07,808 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2129 transitions. Word has length 21 [2022-01-18 15:14:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:07,808 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 2129 transitions. [2022-01-18 15:14:07,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2129 transitions. [2022-01-18 15:14:07,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:07,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:07,809 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:07,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-01-18 15:14:08,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:08,009 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash 933080084, now seen corresponding path program 304 times [2022-01-18 15:14:08,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:08,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385296985] [2022-01-18 15:14:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:08,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:08,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:08,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:08,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385296985] [2022-01-18 15:14:08,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385296985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:08,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228593398] [2022-01-18 15:14:08,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:08,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:08,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:08,132 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:08,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-01-18 15:14:08,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:08,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:08,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:08,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:08,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:08,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:08,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:08,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:08,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:08,481 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:08,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:14:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:08,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228593398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:08,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:08,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:14:08,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989641512] [2022-01-18 15:14:08,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:08,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:14:08,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:08,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:14:08,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:08,487 INFO L87 Difference]: Start difference. First operand 651 states and 2129 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:08,985 INFO L93 Difference]: Finished difference Result 988 states and 3120 transitions. [2022-01-18 15:14:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:14:08,985 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:08,987 INFO L225 Difference]: With dead ends: 988 [2022-01-18 15:14:08,987 INFO L226 Difference]: Without dead ends: 969 [2022-01-18 15:14:08,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:14:08,987 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 105 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:08,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 237 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-01-18 15:14:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 647. [2022-01-18 15:14:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 3.2708978328173375) internal successors, (2113), 646 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:08,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 2113 transitions. [2022-01-18 15:14:08,995 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 2113 transitions. Word has length 21 [2022-01-18 15:14:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:08,995 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 2113 transitions. [2022-01-18 15:14:08,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 2113 transitions. [2022-01-18 15:14:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:08,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:08,996 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:09,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-01-18 15:14:09,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-01-18 15:14:09,196 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:09,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1648231754, now seen corresponding path program 305 times [2022-01-18 15:14:09,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:09,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381275377] [2022-01-18 15:14:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:09,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:09,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:09,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381275377] [2022-01-18 15:14:09,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381275377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:09,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006705188] [2022-01-18 15:14:09,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:09,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:09,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:09,294 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:09,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-01-18 15:14:09,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:14:09,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:09,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:09,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:09,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:09,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:09,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:09,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:09,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-18 15:14:09,755 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:09,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 15:14:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:09,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006705188] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:09,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:09,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:14:09,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821943290] [2022-01-18 15:14:09,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:09,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:14:09,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:09,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:14:09,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:14:09,761 INFO L87 Difference]: Start difference. First operand 647 states and 2113 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:10,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:10,395 INFO L93 Difference]: Finished difference Result 973 states and 3049 transitions. [2022-01-18 15:14:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:14:10,396 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:10,397 INFO L225 Difference]: With dead ends: 973 [2022-01-18 15:14:10,397 INFO L226 Difference]: Without dead ends: 916 [2022-01-18 15:14:10,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:14:10,397 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 131 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:10,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 260 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:14:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-01-18 15:14:10,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 649. [2022-01-18 15:14:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 3.257716049382716) internal successors, (2111), 648 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2111 transitions. [2022-01-18 15:14:10,405 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2111 transitions. Word has length 21 [2022-01-18 15:14:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:10,405 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 2111 transitions. [2022-01-18 15:14:10,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:10,405 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2111 transitions. [2022-01-18 15:14:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:10,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:10,406 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:10,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-01-18 15:14:10,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-01-18 15:14:10,606 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:10,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:10,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1725006804, now seen corresponding path program 306 times [2022-01-18 15:14:10,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:10,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914072012] [2022-01-18 15:14:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:10,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:10,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:10,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914072012] [2022-01-18 15:14:10,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914072012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:10,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800375988] [2022-01-18 15:14:10,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:10,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:10,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:10,720 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:10,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-01-18 15:14:10,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:14:10,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:10,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:10,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:10,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:10,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:10,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:10,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:10,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:14:11,001 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:11,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:14:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:11,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800375988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:11,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:11,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-18 15:14:11,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443138678] [2022-01-18 15:14:11,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:11,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:14:11,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:11,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:14:11,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:14:11,006 INFO L87 Difference]: Start difference. First operand 649 states and 2111 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:11,347 INFO L93 Difference]: Finished difference Result 1061 states and 3346 transitions. [2022-01-18 15:14:11,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:14:11,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:11,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:11,348 INFO L225 Difference]: With dead ends: 1061 [2022-01-18 15:14:11,348 INFO L226 Difference]: Without dead ends: 1042 [2022-01-18 15:14:11,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:14:11,349 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 115 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:11,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 159 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:11,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2022-01-18 15:14:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 650. [2022-01-18 15:14:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 3.2696456086286596) internal successors, (2122), 649 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2122 transitions. [2022-01-18 15:14:11,357 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2122 transitions. Word has length 21 [2022-01-18 15:14:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:11,357 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 2122 transitions. [2022-01-18 15:14:11,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:11,357 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2122 transitions. [2022-01-18 15:14:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:11,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:11,358 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:11,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-01-18 15:14:11,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:11,558 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:11,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:11,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1325018484, now seen corresponding path program 307 times [2022-01-18 15:14:11,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:11,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19981107] [2022-01-18 15:14:11,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:11,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:11,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:11,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19981107] [2022-01-18 15:14:11,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19981107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:11,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999497754] [2022-01-18 15:14:11,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:11,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:11,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:11,664 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:11,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-01-18 15:14:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:11,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:11,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:11,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:11,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:11,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:11,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:12,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:12,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:14:12,056 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:12,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:14:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:12,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999497754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:12,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:12,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:14:12,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699755311] [2022-01-18 15:14:12,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:12,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:12,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:12,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:12,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:12,061 INFO L87 Difference]: Start difference. First operand 650 states and 2122 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:12,697 INFO L93 Difference]: Finished difference Result 1191 states and 3691 transitions. [2022-01-18 15:14:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:14:12,697 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:12,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:12,699 INFO L225 Difference]: With dead ends: 1191 [2022-01-18 15:14:12,699 INFO L226 Difference]: Without dead ends: 1168 [2022-01-18 15:14:12,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:14:12,699 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 140 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:12,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 278 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:14:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2022-01-18 15:14:12,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 667. [2022-01-18 15:14:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.2762762762762763) internal successors, (2182), 666 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2182 transitions. [2022-01-18 15:14:12,708 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2182 transitions. Word has length 21 [2022-01-18 15:14:12,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:12,708 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 2182 transitions. [2022-01-18 15:14:12,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2182 transitions. [2022-01-18 15:14:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:12,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:12,709 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:12,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-01-18 15:14:12,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2022-01-18 15:14:12,909 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:12,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:12,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1428528638, now seen corresponding path program 308 times [2022-01-18 15:14:12,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:12,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167985506] [2022-01-18 15:14:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:12,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:12,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:12,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:12,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167985506] [2022-01-18 15:14:12,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167985506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:12,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018328806] [2022-01-18 15:14:12,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:12,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:12,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:13,000 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:13,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-01-18 15:14:13,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:13,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:13,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:13,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:13,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:13,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:13,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:13,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:13,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:13,340 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:13,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:14:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:13,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018328806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:13,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:13,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:14:13,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121529282] [2022-01-18 15:14:13,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:13,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:14:13,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:13,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:14:13,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:13,345 INFO L87 Difference]: Start difference. First operand 667 states and 2182 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:13,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:13,718 INFO L93 Difference]: Finished difference Result 1096 states and 3414 transitions. [2022-01-18 15:14:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:14:13,718 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:13,720 INFO L225 Difference]: With dead ends: 1096 [2022-01-18 15:14:13,720 INFO L226 Difference]: Without dead ends: 1077 [2022-01-18 15:14:13,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:14:13,720 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 101 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:13,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 180 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:13,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-01-18 15:14:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 664. [2022-01-18 15:14:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 3.276018099547511) internal successors, (2172), 663 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 2172 transitions. [2022-01-18 15:14:13,728 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 2172 transitions. Word has length 21 [2022-01-18 15:14:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:13,728 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 2172 transitions. [2022-01-18 15:14:13,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 2172 transitions. [2022-01-18 15:14:13,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:13,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:13,729 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:13,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-01-18 15:14:13,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:13,930 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:13,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:13,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1381349332, now seen corresponding path program 309 times [2022-01-18 15:14:13,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:13,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943600377] [2022-01-18 15:14:13,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:13,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:14,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:14,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943600377] [2022-01-18 15:14:14,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943600377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:14,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20161609] [2022-01-18 15:14:14,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:14,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:14,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:14,014 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:14,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-01-18 15:14:14,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:14:14,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:14,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:14,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:14,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:14,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:14,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:14,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:14,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:14,349 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:14:14,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-01-18 15:14:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:14,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20161609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:14,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:14,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-18 15:14:14,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570068690] [2022-01-18 15:14:14,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:14,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:14:14,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:14:14,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:14:14,355 INFO L87 Difference]: Start difference. First operand 664 states and 2172 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:14,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:14,826 INFO L93 Difference]: Finished difference Result 1278 states and 3972 transitions. [2022-01-18 15:14:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:14:14,827 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:14,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:14,829 INFO L225 Difference]: With dead ends: 1278 [2022-01-18 15:14:14,829 INFO L226 Difference]: Without dead ends: 1259 [2022-01-18 15:14:14,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:14,829 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 126 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:14,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 246 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:14,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-01-18 15:14:14,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 652. [2022-01-18 15:14:14,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 3.2580645161290325) internal successors, (2121), 651 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:14,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 2121 transitions. [2022-01-18 15:14:14,838 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 2121 transitions. Word has length 21 [2022-01-18 15:14:14,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:14,838 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 2121 transitions. [2022-01-18 15:14:14,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:14,839 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 2121 transitions. [2022-01-18 15:14:14,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:14,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:14,839 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:14,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:15,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:15,040 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:15,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:15,040 INFO L85 PathProgramCache]: Analyzing trace with hash -59516404, now seen corresponding path program 310 times [2022-01-18 15:14:15,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:15,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269920694] [2022-01-18 15:14:15,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:15,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:15,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:15,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269920694] [2022-01-18 15:14:15,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269920694] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:15,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781824954] [2022-01-18 15:14:15,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:15,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:15,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:15,160 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:15,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-01-18 15:14:15,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:15,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:15,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:15,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:15,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:15,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:15,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:15,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:15,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:15,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:15,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:15,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:15,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:15,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:15,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:15,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781824954] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:15,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:15,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:14:15,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544773626] [2022-01-18 15:14:15,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:15,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:14:15,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:14:15,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:15,541 INFO L87 Difference]: Start difference. First operand 652 states and 2121 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:16,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:16,293 INFO L93 Difference]: Finished difference Result 1330 states and 4116 transitions. [2022-01-18 15:14:16,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:14:16,294 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:16,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:16,295 INFO L225 Difference]: With dead ends: 1330 [2022-01-18 15:14:16,295 INFO L226 Difference]: Without dead ends: 1276 [2022-01-18 15:14:16,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=335, Invalid=1387, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:14:16,296 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 213 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:16,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 277 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 500 Invalid, 0 Unknown, 389 Unchecked, 0.2s Time] [2022-01-18 15:14:16,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-01-18 15:14:16,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 657. [2022-01-18 15:14:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.2576219512195124) internal successors, (2137), 656 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2137 transitions. [2022-01-18 15:14:16,305 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2137 transitions. Word has length 21 [2022-01-18 15:14:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:16,305 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 2137 transitions. [2022-01-18 15:14:16,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2137 transitions. [2022-01-18 15:14:16,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:16,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:16,306 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:16,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-01-18 15:14:16,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-01-18 15:14:16,506 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:16,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:16,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1654908243, now seen corresponding path program 311 times [2022-01-18 15:14:16,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:16,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110553299] [2022-01-18 15:14:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:16,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:16,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:16,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110553299] [2022-01-18 15:14:16,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110553299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:16,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403681633] [2022-01-18 15:14:16,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:16,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:16,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:16,608 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:16,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-01-18 15:14:16,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:16,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:16,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:16,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:16,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:16,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:16,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:16,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:16,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:16,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:16,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:17,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:17,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:17,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:17,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:17,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403681633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:17,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:17,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:14:17,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929118519] [2022-01-18 15:14:17,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:17,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:17,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:17,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:17,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:17,044 INFO L87 Difference]: Start difference. First operand 657 states and 2137 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:17,733 INFO L93 Difference]: Finished difference Result 1214 states and 3760 transitions. [2022-01-18 15:14:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:14:17,733 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:17,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:17,735 INFO L225 Difference]: With dead ends: 1214 [2022-01-18 15:14:17,735 INFO L226 Difference]: Without dead ends: 1142 [2022-01-18 15:14:17,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=306, Invalid=1334, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:14:17,736 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 192 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 430 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:17,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 431 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 865 Invalid, 0 Unknown, 430 Unchecked, 0.3s Time] [2022-01-18 15:14:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-01-18 15:14:17,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 657. [2022-01-18 15:14:17,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.254573170731707) internal successors, (2135), 656 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:17,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2135 transitions. [2022-01-18 15:14:17,744 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2135 transitions. Word has length 21 [2022-01-18 15:14:17,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:17,744 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 2135 transitions. [2022-01-18 15:14:17,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:17,744 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2135 transitions. [2022-01-18 15:14:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:17,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:17,745 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:17,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-01-18 15:14:17,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-01-18 15:14:17,946 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:17,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:17,946 INFO L85 PathProgramCache]: Analyzing trace with hash -2002216596, now seen corresponding path program 312 times [2022-01-18 15:14:17,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:17,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028056051] [2022-01-18 15:14:17,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:17,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:18,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:18,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028056051] [2022-01-18 15:14:18,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028056051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:18,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156956084] [2022-01-18 15:14:18,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:18,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:18,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:18,046 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:18,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-01-18 15:14:18,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:14:18,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:18,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:18,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:18,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:18,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:18,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:18,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:18,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:18,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:18,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:18,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:18,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:18,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:18,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:18,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156956084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:18,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:18,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:14:18,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697271181] [2022-01-18 15:14:18,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:18,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:18,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:18,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:18,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:18,447 INFO L87 Difference]: Start difference. First operand 657 states and 2135 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:19,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:19,054 INFO L93 Difference]: Finished difference Result 1356 states and 4203 transitions. [2022-01-18 15:14:19,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:14:19,054 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:19,056 INFO L225 Difference]: With dead ends: 1356 [2022-01-18 15:14:19,056 INFO L226 Difference]: Without dead ends: 1318 [2022-01-18 15:14:19,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=1156, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:14:19,056 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 183 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:19,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 212 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 482 Invalid, 0 Unknown, 295 Unchecked, 0.2s Time] [2022-01-18 15:14:19,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2022-01-18 15:14:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 659. [2022-01-18 15:14:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 3.2522796352583585) internal successors, (2140), 658 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 2140 transitions. [2022-01-18 15:14:19,066 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 2140 transitions. Word has length 21 [2022-01-18 15:14:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:19,066 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 2140 transitions. [2022-01-18 15:14:19,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 2140 transitions. [2022-01-18 15:14:19,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:19,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:19,067 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:19,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-01-18 15:14:19,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-01-18 15:14:19,267 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:19,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1294687500, now seen corresponding path program 313 times [2022-01-18 15:14:19,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:19,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315758613] [2022-01-18 15:14:19,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:19,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:19,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:19,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315758613] [2022-01-18 15:14:19,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315758613] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:19,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594264854] [2022-01-18 15:14:19,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:19,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:19,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:19,404 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:19,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-01-18 15:14:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:19,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:19,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:19,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:19,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:19,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:19,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:19,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:19,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:19,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:19,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:19,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:19,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:19,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:19,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:19,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594264854] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:19,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:19,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:14:19,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550425040] [2022-01-18 15:14:19,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:19,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:19,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:19,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:19,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:19,801 INFO L87 Difference]: Start difference. First operand 659 states and 2140 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:20,700 INFO L93 Difference]: Finished difference Result 1389 states and 4331 transitions. [2022-01-18 15:14:20,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:14:20,700 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:20,702 INFO L225 Difference]: With dead ends: 1389 [2022-01-18 15:14:20,702 INFO L226 Difference]: Without dead ends: 1366 [2022-01-18 15:14:20,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:14:20,702 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 157 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:20,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 307 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 962 Invalid, 0 Unknown, 75 Unchecked, 0.4s Time] [2022-01-18 15:14:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2022-01-18 15:14:20,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 655. [2022-01-18 15:14:20,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 3.256880733944954) internal successors, (2130), 654 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:20,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 2130 transitions. [2022-01-18 15:14:20,712 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 2130 transitions. Word has length 21 [2022-01-18 15:14:20,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:20,712 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 2130 transitions. [2022-01-18 15:14:20,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:20,712 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 2130 transitions. [2022-01-18 15:14:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:20,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:20,713 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:20,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-01-18 15:14:20,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:20,913 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:20,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:20,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1025293522, now seen corresponding path program 314 times [2022-01-18 15:14:20,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:20,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185756794] [2022-01-18 15:14:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:20,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:21,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:21,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185756794] [2022-01-18 15:14:21,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185756794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:21,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522167980] [2022-01-18 15:14:21,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:21,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:21,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:21,027 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:21,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-01-18 15:14:21,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:21,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:21,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:21,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:21,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:21,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:21,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:21,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:21,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:21,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:21,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:21,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:21,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:21,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:21,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:21,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522167980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:21,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:21,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:14:21,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072663087] [2022-01-18 15:14:21,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:21,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:21,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:21,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:21,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:21,436 INFO L87 Difference]: Start difference. First operand 655 states and 2130 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:22,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:22,236 INFO L93 Difference]: Finished difference Result 1176 states and 3657 transitions. [2022-01-18 15:14:22,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:14:22,236 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:22,238 INFO L225 Difference]: With dead ends: 1176 [2022-01-18 15:14:22,238 INFO L226 Difference]: Without dead ends: 1157 [2022-01-18 15:14:22,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:14:22,238 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 179 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:22,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 253 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 771 Invalid, 0 Unknown, 220 Unchecked, 0.3s Time] [2022-01-18 15:14:22,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-01-18 15:14:22,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 660. [2022-01-18 15:14:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 3.2564491654021244) internal successors, (2146), 659 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2146 transitions. [2022-01-18 15:14:22,247 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2146 transitions. Word has length 21 [2022-01-18 15:14:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:22,247 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 2146 transitions. [2022-01-18 15:14:22,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:22,247 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2146 transitions. [2022-01-18 15:14:22,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:22,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:22,248 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:22,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Ended with exit code 0 [2022-01-18 15:14:22,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2022-01-18 15:14:22,448 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:22,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:22,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1749072051, now seen corresponding path program 315 times [2022-01-18 15:14:22,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:22,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556496503] [2022-01-18 15:14:22,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:22,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:22,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:22,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556496503] [2022-01-18 15:14:22,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556496503] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:22,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769027019] [2022-01-18 15:14:22,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:22,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:22,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:22,557 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:22,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-01-18 15:14:22,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:14:22,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:22,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:22,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:22,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:22,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:22,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:22,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:22,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:22,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:22,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:22,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:22,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:22,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:22,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:22,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769027019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:22,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:22,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:14:22,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546654567] [2022-01-18 15:14:22,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:22,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:22,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:22,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:22,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:22,992 INFO L87 Difference]: Start difference. First operand 660 states and 2146 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:23,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:23,501 INFO L93 Difference]: Finished difference Result 1118 states and 3499 transitions. [2022-01-18 15:14:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:14:23,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:23,503 INFO L225 Difference]: With dead ends: 1118 [2022-01-18 15:14:23,503 INFO L226 Difference]: Without dead ends: 1058 [2022-01-18 15:14:23,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:14:23,503 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 121 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:23,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 251 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 746 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2022-01-18 15:14:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-01-18 15:14:23,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 665. [2022-01-18 15:14:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 3.253012048192771) internal successors, (2160), 664 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 2160 transitions. [2022-01-18 15:14:23,512 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 2160 transitions. Word has length 21 [2022-01-18 15:14:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:23,512 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 2160 transitions. [2022-01-18 15:14:23,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 2160 transitions. [2022-01-18 15:14:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:23,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:23,513 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:23,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-01-18 15:14:23,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2022-01-18 15:14:23,714 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:23,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:23,714 INFO L85 PathProgramCache]: Analyzing trace with hash 27230322, now seen corresponding path program 316 times [2022-01-18 15:14:23,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:23,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325199390] [2022-01-18 15:14:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:23,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:23,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:23,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325199390] [2022-01-18 15:14:23,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325199390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:23,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785150746] [2022-01-18 15:14:23,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:23,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:23,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:23,819 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:23,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-01-18 15:14:23,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:23,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:23,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:23,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:23,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:23,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:23,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:23,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:23,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:24,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:24,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:24,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:24,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:24,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:24,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:24,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:24,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785150746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:24,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:24,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:14:24,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849216038] [2022-01-18 15:14:24,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:24,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:24,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:24,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:24,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:24,211 INFO L87 Difference]: Start difference. First operand 665 states and 2160 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:25,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:25,111 INFO L93 Difference]: Finished difference Result 1285 states and 4017 transitions. [2022-01-18 15:14:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:14:25,111 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:25,113 INFO L225 Difference]: With dead ends: 1285 [2022-01-18 15:14:25,113 INFO L226 Difference]: Without dead ends: 1262 [2022-01-18 15:14:25,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:14:25,114 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 166 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:25,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 311 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1132 Invalid, 0 Unknown, 12 Unchecked, 0.4s Time] [2022-01-18 15:14:25,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2022-01-18 15:14:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 661. [2022-01-18 15:14:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 3.2545454545454544) internal successors, (2148), 660 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 2148 transitions. [2022-01-18 15:14:25,123 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 2148 transitions. Word has length 21 [2022-01-18 15:14:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:25,123 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 2148 transitions. [2022-01-18 15:14:25,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 2148 transitions. [2022-01-18 15:14:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:25,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:25,124 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:25,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-01-18 15:14:25,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:25,324 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:25,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:25,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1067466120, now seen corresponding path program 317 times [2022-01-18 15:14:25,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:25,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592695407] [2022-01-18 15:14:25,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:25,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:25,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:25,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592695407] [2022-01-18 15:14:25,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592695407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:25,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703533541] [2022-01-18 15:14:25,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:25,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:25,437 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:25,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-01-18 15:14:25,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:14:25,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:25,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:25,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:25,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:25,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:25,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:25,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:25,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:14:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:25,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:25,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:25,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:25,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:25,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:25,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:25,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:25,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703533541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:25,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:25,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:14:25,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247416204] [2022-01-18 15:14:25,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:25,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:25,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:25,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:25,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:25,844 INFO L87 Difference]: Start difference. First operand 661 states and 2148 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:26,725 INFO L93 Difference]: Finished difference Result 1213 states and 3764 transitions. [2022-01-18 15:14:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:14:26,725 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:26,727 INFO L225 Difference]: With dead ends: 1213 [2022-01-18 15:14:26,727 INFO L226 Difference]: Without dead ends: 1186 [2022-01-18 15:14:26,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:14:26,727 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 165 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:26,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 251 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:14:26,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-01-18 15:14:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 662. [2022-01-18 15:14:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 3.2571860816944023) internal successors, (2153), 661 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2153 transitions. [2022-01-18 15:14:26,736 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2153 transitions. Word has length 21 [2022-01-18 15:14:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:26,736 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 2153 transitions. [2022-01-18 15:14:26,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2153 transitions. [2022-01-18 15:14:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:26,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:26,737 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:26,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-01-18 15:14:26,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:26,938 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:26,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1670707117, now seen corresponding path program 318 times [2022-01-18 15:14:26,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:26,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248856350] [2022-01-18 15:14:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:26,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:27,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:27,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248856350] [2022-01-18 15:14:27,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248856350] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:27,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427413060] [2022-01-18 15:14:27,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:27,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:27,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:27,051 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:27,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-01-18 15:14:27,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:14:27,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:27,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:27,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:27,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:27,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:27,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:27,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:27,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:27,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:27,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:27,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:27,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:27,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:27,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:27,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:27,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427413060] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:27,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:27,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:14:27,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264459509] [2022-01-18 15:14:27,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:27,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:27,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:27,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:27,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:27,449 INFO L87 Difference]: Start difference. First operand 662 states and 2153 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:28,178 INFO L93 Difference]: Finished difference Result 1133 states and 3544 transitions. [2022-01-18 15:14:28,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:14:28,179 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:28,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:28,180 INFO L225 Difference]: With dead ends: 1133 [2022-01-18 15:14:28,181 INFO L226 Difference]: Without dead ends: 1106 [2022-01-18 15:14:28,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:14:28,181 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 135 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:28,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 242 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-01-18 15:14:28,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 676. [2022-01-18 15:14:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 3.254814814814815) internal successors, (2197), 675 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2197 transitions. [2022-01-18 15:14:28,198 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2197 transitions. Word has length 21 [2022-01-18 15:14:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:28,199 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 2197 transitions. [2022-01-18 15:14:28,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2197 transitions. [2022-01-18 15:14:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:28,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:28,199 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:28,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-01-18 15:14:28,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:28,400 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:28,400 INFO L85 PathProgramCache]: Analyzing trace with hash 672643917, now seen corresponding path program 319 times [2022-01-18 15:14:28,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:28,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121282423] [2022-01-18 15:14:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:28,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:28,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:28,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121282423] [2022-01-18 15:14:28,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121282423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:28,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5522525] [2022-01-18 15:14:28,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:28,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:28,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:28,511 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:28,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-01-18 15:14:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:28,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:28,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:28,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:28,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:28,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:28,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:28,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:14:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:28,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:28,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:28,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:28,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:28,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:28,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:28,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:28,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5522525] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:28,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:28,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:14:28,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783385514] [2022-01-18 15:14:28,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:28,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:14:28,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:14:28,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:14:28,903 INFO L87 Difference]: Start difference. First operand 676 states and 2197 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:29,363 INFO L93 Difference]: Finished difference Result 1001 states and 3152 transitions. [2022-01-18 15:14:29,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:14:29,364 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:29,365 INFO L225 Difference]: With dead ends: 1001 [2022-01-18 15:14:29,365 INFO L226 Difference]: Without dead ends: 980 [2022-01-18 15:14:29,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:14:29,365 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 146 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:29,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 176 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:29,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-01-18 15:14:29,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 668. [2022-01-18 15:14:29,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 3.260869565217391) internal successors, (2175), 667 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 2175 transitions. [2022-01-18 15:14:29,373 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 2175 transitions. Word has length 21 [2022-01-18 15:14:29,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:29,373 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 2175 transitions. [2022-01-18 15:14:29,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:29,373 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 2175 transitions. [2022-01-18 15:14:29,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:29,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:29,374 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:29,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-01-18 15:14:29,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:29,575 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:29,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:29,575 INFO L85 PathProgramCache]: Analyzing trace with hash -474877415, now seen corresponding path program 320 times [2022-01-18 15:14:29,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:29,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94622775] [2022-01-18 15:14:29,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:29,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:29,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:29,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94622775] [2022-01-18 15:14:29,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94622775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:29,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585852179] [2022-01-18 15:14:29,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:29,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:29,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:29,654 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:29,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-01-18 15:14:29,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:29,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:29,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:29,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:29,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:29,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:29,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:29,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:29,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:29,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:29,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:29,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:29,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:29,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585852179] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:29,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:29,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-18 15:14:29,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048031215] [2022-01-18 15:14:29,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:29,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:14:29,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:29,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:14:29,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:14:29,925 INFO L87 Difference]: Start difference. First operand 668 states and 2175 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:30,155 INFO L93 Difference]: Finished difference Result 859 states and 2725 transitions. [2022-01-18 15:14:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:30,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:30,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:30,156 INFO L225 Difference]: With dead ends: 859 [2022-01-18 15:14:30,156 INFO L226 Difference]: Without dead ends: 837 [2022-01-18 15:14:30,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:14:30,157 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 80 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:30,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 164 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-01-18 15:14:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 671. [2022-01-18 15:14:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.2597014925373133) internal successors, (2184), 670 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2184 transitions. [2022-01-18 15:14:30,164 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2184 transitions. Word has length 21 [2022-01-18 15:14:30,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:30,164 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 2184 transitions. [2022-01-18 15:14:30,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:30,164 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2184 transitions. [2022-01-18 15:14:30,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:30,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:30,165 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:30,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-01-18 15:14:30,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-01-18 15:14:30,365 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:30,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:30,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1877389689, now seen corresponding path program 321 times [2022-01-18 15:14:30,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:30,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880471097] [2022-01-18 15:14:30,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:30,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:30,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:30,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880471097] [2022-01-18 15:14:30,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880471097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:30,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93890969] [2022-01-18 15:14:30,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:30,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:30,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:30,451 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:30,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-01-18 15:14:30,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:14:30,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:30,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:30,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:30,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:30,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:30,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:30,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:30,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:30,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:30,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:30,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:30,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:30,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93890969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:30,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:30,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-18 15:14:30,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478058188] [2022-01-18 15:14:30,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:30,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:14:30,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:30,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:14:30,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:14:30,738 INFO L87 Difference]: Start difference. First operand 671 states and 2184 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:30,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:30,936 INFO L93 Difference]: Finished difference Result 821 states and 2607 transitions. [2022-01-18 15:14:30,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:14:30,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:30,937 INFO L225 Difference]: With dead ends: 821 [2022-01-18 15:14:30,937 INFO L226 Difference]: Without dead ends: 777 [2022-01-18 15:14:30,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:14:30,938 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:30,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 158 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:30,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-01-18 15:14:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 674. [2022-01-18 15:14:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.2585438335809807) internal successors, (2193), 673 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2193 transitions. [2022-01-18 15:14:30,945 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2193 transitions. Word has length 21 [2022-01-18 15:14:30,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:30,945 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 2193 transitions. [2022-01-18 15:14:30,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2193 transitions. [2022-01-18 15:14:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:30,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:30,946 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:30,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Ended with exit code 0 [2022-01-18 15:14:31,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-01-18 15:14:31,146 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:31,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:31,147 INFO L85 PathProgramCache]: Analyzing trace with hash 879326489, now seen corresponding path program 322 times [2022-01-18 15:14:31,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:31,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782944624] [2022-01-18 15:14:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:31,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:31,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:31,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782944624] [2022-01-18 15:14:31,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782944624] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:31,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999098896] [2022-01-18 15:14:31,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:31,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:31,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:31,260 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:31,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-01-18 15:14:31,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:31,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:31,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:31,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:31,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:31,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:31,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:31,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:31,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:31,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:31,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:31,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:31,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:31,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999098896] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:31,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:31,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 18 [2022-01-18 15:14:31,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717592682] [2022-01-18 15:14:31,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:31,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:14:31,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:31,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:14:31,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:14:31,640 INFO L87 Difference]: Start difference. First operand 674 states and 2193 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:31,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:31,818 INFO L93 Difference]: Finished difference Result 787 states and 2519 transitions. [2022-01-18 15:14:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:31,818 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:31,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:31,820 INFO L225 Difference]: With dead ends: 787 [2022-01-18 15:14:31,820 INFO L226 Difference]: Without dead ends: 765 [2022-01-18 15:14:31,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:14:31,820 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:31,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 125 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-01-18 15:14:31,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 673. [2022-01-18 15:14:31,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.2663690476190474) internal successors, (2195), 672 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2195 transitions. [2022-01-18 15:14:31,827 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2195 transitions. Word has length 21 [2022-01-18 15:14:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:31,827 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 2195 transitions. [2022-01-18 15:14:31,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:31,828 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2195 transitions. [2022-01-18 15:14:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:31,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:31,828 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:31,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-01-18 15:14:32,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable333,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:32,029 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:32,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1157941808, now seen corresponding path program 323 times [2022-01-18 15:14:32,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:32,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655063027] [2022-01-18 15:14:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:32,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:32,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:32,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655063027] [2022-01-18 15:14:32,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655063027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:32,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215931462] [2022-01-18 15:14:32,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:32,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:32,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:32,114 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:32,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-01-18 15:14:32,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:32,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:32,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:32,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:32,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:32,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:32,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:32,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:32,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:32,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:32,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:32,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:32,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:32,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215931462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:32,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:32,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-18 15:14:32,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913492017] [2022-01-18 15:14:32,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:32,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:14:32,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:32,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:14:32,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:14:32,442 INFO L87 Difference]: Start difference. First operand 673 states and 2195 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:33,278 INFO L93 Difference]: Finished difference Result 1247 states and 3870 transitions. [2022-01-18 15:14:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:14:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:33,280 INFO L225 Difference]: With dead ends: 1247 [2022-01-18 15:14:33,280 INFO L226 Difference]: Without dead ends: 1228 [2022-01-18 15:14:33,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:14:33,280 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 253 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:33,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 213 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:33,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-01-18 15:14:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 676. [2022-01-18 15:14:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 3.2696296296296294) internal successors, (2207), 675 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2207 transitions. [2022-01-18 15:14:33,290 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2207 transitions. Word has length 21 [2022-01-18 15:14:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:33,290 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 2207 transitions. [2022-01-18 15:14:33,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2207 transitions. [2022-01-18 15:14:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:33,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:33,291 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:33,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-01-18 15:14:33,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-01-18 15:14:33,491 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:33,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:33,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1541633649, now seen corresponding path program 324 times [2022-01-18 15:14:33,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:33,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825089000] [2022-01-18 15:14:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:33,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:33,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:33,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825089000] [2022-01-18 15:14:33,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825089000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:33,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284604228] [2022-01-18 15:14:33,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:33,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:33,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:33,593 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:33,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-01-18 15:14:33,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:14:33,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:33,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:33,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:33,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:33,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:33,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:33,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:33,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:33,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:33,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:33,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:33,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:33,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284604228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:33,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:33,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:14:33,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885995401] [2022-01-18 15:14:33,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:33,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:33,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:33,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:33,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:33,964 INFO L87 Difference]: Start difference. First operand 676 states and 2207 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:34,789 INFO L93 Difference]: Finished difference Result 1262 states and 3930 transitions. [2022-01-18 15:14:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:14:34,790 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:34,791 INFO L225 Difference]: With dead ends: 1262 [2022-01-18 15:14:34,791 INFO L226 Difference]: Without dead ends: 1223 [2022-01-18 15:14:34,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:14:34,792 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 266 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:34,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 268 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:14:34,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-01-18 15:14:34,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 677. [2022-01-18 15:14:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.269230769230769) internal successors, (2210), 676 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2210 transitions. [2022-01-18 15:14:34,801 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2210 transitions. Word has length 21 [2022-01-18 15:14:34,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:34,801 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 2210 transitions. [2022-01-18 15:14:34,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2210 transitions. [2022-01-18 15:14:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:34,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:34,802 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:34,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-01-18 15:14:35,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2022-01-18 15:14:35,002 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:35,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:35,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1194325296, now seen corresponding path program 325 times [2022-01-18 15:14:35,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:35,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830555933] [2022-01-18 15:14:35,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:35,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:35,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:35,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830555933] [2022-01-18 15:14:35,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830555933] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:35,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202564262] [2022-01-18 15:14:35,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:35,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:35,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:35,105 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:35,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-01-18 15:14:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:35,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:35,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:35,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:35,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:35,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:35,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:35,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:35,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:35,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:35,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:35,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:35,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202564262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:35,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:35,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:14:35,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548441833] [2022-01-18 15:14:35,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:35,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:35,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:35,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:35,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:35,466 INFO L87 Difference]: Start difference. First operand 677 states and 2210 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:36,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:36,467 INFO L93 Difference]: Finished difference Result 1493 states and 4614 transitions. [2022-01-18 15:14:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:14:36,467 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:36,469 INFO L225 Difference]: With dead ends: 1493 [2022-01-18 15:14:36,469 INFO L226 Difference]: Without dead ends: 1474 [2022-01-18 15:14:36,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=365, Invalid=1891, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:14:36,470 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 279 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:36,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 272 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:14:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2022-01-18 15:14:36,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 679. [2022-01-18 15:14:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 3.2669616519174043) internal successors, (2215), 678 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:36,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2215 transitions. [2022-01-18 15:14:36,480 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2215 transitions. Word has length 21 [2022-01-18 15:14:36,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:36,480 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2215 transitions. [2022-01-18 15:14:36,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:36,481 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2215 transitions. [2022-01-18 15:14:36,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:36,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:36,481 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:36,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-01-18 15:14:36,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:36,682 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:36,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:36,682 INFO L85 PathProgramCache]: Analyzing trace with hash 196262096, now seen corresponding path program 326 times [2022-01-18 15:14:36,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:36,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843453398] [2022-01-18 15:14:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:36,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:36,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:36,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843453398] [2022-01-18 15:14:36,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843453398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:36,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053710020] [2022-01-18 15:14:36,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:36,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:36,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:36,776 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:36,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-01-18 15:14:36,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:36,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:36,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:36,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:36,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:36,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:36,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:36,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:37,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:37,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:37,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:37,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:37,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:37,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:37,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053710020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:37,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:37,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:14:37,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135515490] [2022-01-18 15:14:37,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:37,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:14:37,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:37,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:14:37,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:37,143 INFO L87 Difference]: Start difference. First operand 679 states and 2215 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:37,811 INFO L93 Difference]: Finished difference Result 1351 states and 4208 transitions. [2022-01-18 15:14:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:14:37,811 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:37,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:37,814 INFO L225 Difference]: With dead ends: 1351 [2022-01-18 15:14:37,814 INFO L226 Difference]: Without dead ends: 1328 [2022-01-18 15:14:37,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:14:37,814 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 198 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:37,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 195 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:14:37,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2022-01-18 15:14:37,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 676. [2022-01-18 15:14:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 3.2755555555555556) internal successors, (2211), 675 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2211 transitions. [2022-01-18 15:14:37,824 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2211 transitions. Word has length 21 [2022-01-18 15:14:37,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:37,824 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 2211 transitions. [2022-01-18 15:14:37,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:37,824 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2211 transitions. [2022-01-18 15:14:37,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:37,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:37,825 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:37,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-01-18 15:14:38,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:38,025 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:38,025 INFO L85 PathProgramCache]: Analyzing trace with hash 214132771, now seen corresponding path program 327 times [2022-01-18 15:14:38,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:38,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921888980] [2022-01-18 15:14:38,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:38,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:38,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:38,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921888980] [2022-01-18 15:14:38,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921888980] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:38,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992666081] [2022-01-18 15:14:38,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:38,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:38,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:38,108 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:38,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-01-18 15:14:38,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:14:38,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:38,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:38,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:38,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:38,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:38,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:38,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:38,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:38,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:38,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:38,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:38,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:38,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:38,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992666081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:38,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:38,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-18 15:14:38,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633573465] [2022-01-18 15:14:38,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:38,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:14:38,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:38,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:14:38,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:14:38,428 INFO L87 Difference]: Start difference. First operand 676 states and 2211 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:38,635 INFO L93 Difference]: Finished difference Result 1030 states and 3262 transitions. [2022-01-18 15:14:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:38,635 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:38,637 INFO L225 Difference]: With dead ends: 1030 [2022-01-18 15:14:38,637 INFO L226 Difference]: Without dead ends: 1008 [2022-01-18 15:14:38,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:14:38,637 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:38,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 135 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-01-18 15:14:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 679. [2022-01-18 15:14:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 3.2728613569321534) internal successors, (2219), 678 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2219 transitions. [2022-01-18 15:14:38,645 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2219 transitions. Word has length 21 [2022-01-18 15:14:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:38,645 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2219 transitions. [2022-01-18 15:14:38,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2219 transitions. [2022-01-18 15:14:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:38,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:38,646 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:38,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Ended with exit code 0 [2022-01-18 15:14:38,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-01-18 15:14:38,846 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:38,847 INFO L85 PathProgramCache]: Analyzing trace with hash 355093033, now seen corresponding path program 328 times [2022-01-18 15:14:38,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:38,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641947632] [2022-01-18 15:14:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:38,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:38,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:38,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641947632] [2022-01-18 15:14:38,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641947632] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:38,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536030261] [2022-01-18 15:14:38,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:38,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:38,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:38,936 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:38,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-01-18 15:14:38,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:38,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:38,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:39,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:39,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:39,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:39,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:39,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:39,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:39,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:39,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:39,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:39,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:39,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536030261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:39,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:39,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-18 15:14:39,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816126279] [2022-01-18 15:14:39,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:39,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:14:39,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:39,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:14:39,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:14:39,255 INFO L87 Difference]: Start difference. First operand 679 states and 2219 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:39,470 INFO L93 Difference]: Finished difference Result 945 states and 3012 transitions. [2022-01-18 15:14:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:39,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:39,471 INFO L225 Difference]: With dead ends: 945 [2022-01-18 15:14:39,471 INFO L226 Difference]: Without dead ends: 923 [2022-01-18 15:14:39,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:39,472 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 77 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:39,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 137 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:39,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-01-18 15:14:39,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 682. [2022-01-18 15:14:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 3.2701908957415564) internal successors, (2227), 681 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 2227 transitions. [2022-01-18 15:14:39,479 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 2227 transitions. Word has length 21 [2022-01-18 15:14:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:39,479 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 2227 transitions. [2022-01-18 15:14:39,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:39,480 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 2227 transitions. [2022-01-18 15:14:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:39,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:39,480 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:39,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-01-18 15:14:39,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:39,681 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash 285590325, now seen corresponding path program 329 times [2022-01-18 15:14:39,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:39,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577082260] [2022-01-18 15:14:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:39,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:39,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:39,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577082260] [2022-01-18 15:14:39,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577082260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:39,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155043486] [2022-01-18 15:14:39,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:39,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:39,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:39,771 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:39,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-01-18 15:14:39,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:14:39,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:39,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:39,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:39,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:39,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:39,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:39,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:39,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:40,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:40,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:40,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:40,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:40,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:40,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:40,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155043486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:40,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:40,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-18 15:14:40,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866596761] [2022-01-18 15:14:40,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:40,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:14:40,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:40,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:14:40,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:14:40,101 INFO L87 Difference]: Start difference. First operand 682 states and 2227 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:40,294 INFO L93 Difference]: Finished difference Result 951 states and 3025 transitions. [2022-01-18 15:14:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:40,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:40,296 INFO L225 Difference]: With dead ends: 951 [2022-01-18 15:14:40,296 INFO L226 Difference]: Without dead ends: 922 [2022-01-18 15:14:40,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:40,296 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:40,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 115 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:40,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-01-18 15:14:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 673. [2022-01-18 15:14:40,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.2663690476190474) internal successors, (2195), 672 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2195 transitions. [2022-01-18 15:14:40,304 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2195 transitions. Word has length 21 [2022-01-18 15:14:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:40,304 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 2195 transitions. [2022-01-18 15:14:40,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2195 transitions. [2022-01-18 15:14:40,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:40,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:40,305 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:40,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:40,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:40,505 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:40,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1888127447, now seen corresponding path program 330 times [2022-01-18 15:14:40,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:40,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068138156] [2022-01-18 15:14:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:40,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:40,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:40,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068138156] [2022-01-18 15:14:40,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068138156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:40,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088451953] [2022-01-18 15:14:40,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:40,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:40,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:40,612 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:40,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-01-18 15:14:40,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:14:40,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:40,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:40,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:40,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:40,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:40,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:40,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:40,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:40,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:40,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:40,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:40,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:40,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088451953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:40,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:40,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:14:40,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896051009] [2022-01-18 15:14:40,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:40,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:14:40,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:40,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:14:40,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:40,934 INFO L87 Difference]: Start difference. First operand 673 states and 2195 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:41,189 INFO L93 Difference]: Finished difference Result 850 states and 2697 transitions. [2022-01-18 15:14:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:14:41,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:41,191 INFO L225 Difference]: With dead ends: 850 [2022-01-18 15:14:41,191 INFO L226 Difference]: Without dead ends: 806 [2022-01-18 15:14:41,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:41,191 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:41,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 210 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-01-18 15:14:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 676. [2022-01-18 15:14:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 3.265185185185185) internal successors, (2204), 675 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2204 transitions. [2022-01-18 15:14:41,198 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2204 transitions. Word has length 21 [2022-01-18 15:14:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:41,198 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 2204 transitions. [2022-01-18 15:14:41,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:41,198 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2204 transitions. [2022-01-18 15:14:41,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:41,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:41,199 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:41,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-01-18 15:14:41,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:41,400 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1408776649, now seen corresponding path program 331 times [2022-01-18 15:14:41,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:41,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726928709] [2022-01-18 15:14:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:41,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:41,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:41,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726928709] [2022-01-18 15:14:41,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726928709] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:41,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057226841] [2022-01-18 15:14:41,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:41,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:41,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:41,493 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:41,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-01-18 15:14:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:41,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:41,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:41,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:41,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:41,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:41,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:41,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:41,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:41,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:41,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:41,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:41,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057226841] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:41,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:41,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:14:41,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103035941] [2022-01-18 15:14:41,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:41,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:14:41,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:41,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:14:41,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:14:41,806 INFO L87 Difference]: Start difference. First operand 676 states and 2204 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:41,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:41,977 INFO L93 Difference]: Finished difference Result 804 states and 2576 transitions. [2022-01-18 15:14:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:41,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:41,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:41,979 INFO L225 Difference]: With dead ends: 804 [2022-01-18 15:14:41,979 INFO L226 Difference]: Without dead ends: 782 [2022-01-18 15:14:41,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:41,979 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:41,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 122 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:14:41,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-01-18 15:14:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 673. [2022-01-18 15:14:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.2663690476190474) internal successors, (2195), 672 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2195 transitions. [2022-01-18 15:14:41,986 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2195 transitions. Word has length 21 [2022-01-18 15:14:41,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:41,986 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 2195 transitions. [2022-01-18 15:14:41,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2195 transitions. [2022-01-18 15:14:41,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:41,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:41,987 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:42,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Ended with exit code 0 [2022-01-18 15:14:42,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:42,187 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:42,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:42,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1633067118, now seen corresponding path program 332 times [2022-01-18 15:14:42,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:42,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107391] [2022-01-18 15:14:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:42,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:42,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:42,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107391] [2022-01-18 15:14:42,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107391] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:42,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371587316] [2022-01-18 15:14:42,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:42,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:42,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:42,343 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:42,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-01-18 15:14:42,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:42,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:42,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:42,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:42,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:42,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:42,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:42,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:42,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:42,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:14:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:42,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:42,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:42,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:42,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:42,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:42,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:42,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:43,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371587316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:43,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:43,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:14:43,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124573080] [2022-01-18 15:14:43,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:43,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:14:43,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:43,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:14:43,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:14:43,024 INFO L87 Difference]: Start difference. First operand 673 states and 2195 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:43,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:43,825 INFO L93 Difference]: Finished difference Result 1249 states and 3884 transitions. [2022-01-18 15:14:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:14:43,826 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:43,828 INFO L225 Difference]: With dead ends: 1249 [2022-01-18 15:14:43,828 INFO L226 Difference]: Without dead ends: 1211 [2022-01-18 15:14:43,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:14:43,828 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:43,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 305 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 803 Invalid, 0 Unknown, 240 Unchecked, 0.3s Time] [2022-01-18 15:14:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-01-18 15:14:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 679. [2022-01-18 15:14:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 3.2728613569321534) internal successors, (2219), 678 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2219 transitions. [2022-01-18 15:14:43,837 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2219 transitions. Word has length 21 [2022-01-18 15:14:43,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:43,837 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2219 transitions. [2022-01-18 15:14:43,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2219 transitions. [2022-01-18 15:14:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:43,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:43,838 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:43,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-01-18 15:14:44,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-01-18 15:14:44,039 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:44,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:44,039 INFO L85 PathProgramCache]: Analyzing trace with hash -112465395, now seen corresponding path program 333 times [2022-01-18 15:14:44,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:44,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343480062] [2022-01-18 15:14:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:44,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:44,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:44,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343480062] [2022-01-18 15:14:44,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343480062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:44,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036915771] [2022-01-18 15:14:44,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:44,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:44,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:44,165 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:44,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-01-18 15:14:44,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:14:44,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:44,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:44,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:44,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:44,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:44,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:44,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:44,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:44,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:14:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:44,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:44,793 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:44,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:44,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:44,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:44,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:44,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:44,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036915771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:44,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:44,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:14:44,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927856829] [2022-01-18 15:14:44,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:44,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:14:44,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:44,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:14:44,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:14:44,900 INFO L87 Difference]: Start difference. First operand 679 states and 2219 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:45,428 INFO L93 Difference]: Finished difference Result 1183 states and 3708 transitions. [2022-01-18 15:14:45,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:14:45,428 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:45,430 INFO L225 Difference]: With dead ends: 1183 [2022-01-18 15:14:45,430 INFO L226 Difference]: Without dead ends: 1117 [2022-01-18 15:14:45,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:14:45,430 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:45,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 231 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 537 Invalid, 0 Unknown, 294 Unchecked, 0.2s Time] [2022-01-18 15:14:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-01-18 15:14:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 682. [2022-01-18 15:14:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 3.267254038179148) internal successors, (2225), 681 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 2225 transitions. [2022-01-18 15:14:45,439 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 2225 transitions. Word has length 21 [2022-01-18 15:14:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:45,439 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 2225 transitions. [2022-01-18 15:14:45,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 2225 transitions. [2022-01-18 15:14:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:45,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:45,440 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:45,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Ended with exit code 0 [2022-01-18 15:14:45,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-01-18 15:14:45,640 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:45,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:45,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1663836978, now seen corresponding path program 334 times [2022-01-18 15:14:45,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:45,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305899583] [2022-01-18 15:14:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:45,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:45,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:45,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305899583] [2022-01-18 15:14:45,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305899583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:45,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062735309] [2022-01-18 15:14:45,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:45,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:45,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:45,770 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:45,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-01-18 15:14:45,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:45,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:45,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:45,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:45,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:45,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:45,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:45,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:45,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:46,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:46,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:46,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:46,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:46,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:46,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:46,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:46,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062735309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:46,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:46,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:14:46,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146014079] [2022-01-18 15:14:46,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:46,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:14:46,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:46,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:14:46,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:14:46,266 INFO L87 Difference]: Start difference. First operand 682 states and 2225 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:47,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:47,300 INFO L93 Difference]: Finished difference Result 1366 states and 4215 transitions. [2022-01-18 15:14:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:14:47,301 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:47,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:47,303 INFO L225 Difference]: With dead ends: 1366 [2022-01-18 15:14:47,303 INFO L226 Difference]: Without dead ends: 1324 [2022-01-18 15:14:47,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:14:47,303 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 166 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:47,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 369 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1216 Invalid, 0 Unknown, 219 Unchecked, 0.5s Time] [2022-01-18 15:14:47,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-01-18 15:14:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 680. [2022-01-18 15:14:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.2695139911634756) internal successors, (2220), 679 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:47,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2220 transitions. [2022-01-18 15:14:47,313 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2220 transitions. Word has length 21 [2022-01-18 15:14:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:47,313 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 2220 transitions. [2022-01-18 15:14:47,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2220 transitions. [2022-01-18 15:14:47,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:47,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:47,314 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:47,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Ended with exit code 0 [2022-01-18 15:14:47,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-01-18 15:14:47,515 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:47,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:47,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1320687327, now seen corresponding path program 335 times [2022-01-18 15:14:47,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:47,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241238965] [2022-01-18 15:14:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:47,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:47,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:47,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241238965] [2022-01-18 15:14:47,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241238965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:47,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745358625] [2022-01-18 15:14:47,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:47,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:47,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:47,619 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:47,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-01-18 15:14:47,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:47,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:47,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:47,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:47,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:47,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:48,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:48,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:48,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:48,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:14:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:48,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:48,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:48,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:48,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:48,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:48,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:48,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:48,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745358625] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:48,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:48,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:14:48,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301170231] [2022-01-18 15:14:48,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:48,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:48,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:48,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:48,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:48,261 INFO L87 Difference]: Start difference. First operand 680 states and 2220 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:48,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:48,368 INFO L93 Difference]: Finished difference Result 811 states and 2586 transitions. [2022-01-18 15:14:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:14:48,369 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:48,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:48,370 INFO L225 Difference]: With dead ends: 811 [2022-01-18 15:14:48,370 INFO L226 Difference]: Without dead ends: 767 [2022-01-18 15:14:48,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:48,370 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:48,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 160 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 338 Unchecked, 0.1s Time] [2022-01-18 15:14:48,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-01-18 15:14:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 680. [2022-01-18 15:14:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.2695139911634756) internal successors, (2220), 679 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2220 transitions. [2022-01-18 15:14:48,377 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2220 transitions. Word has length 21 [2022-01-18 15:14:48,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:48,378 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 2220 transitions. [2022-01-18 15:14:48,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2220 transitions. [2022-01-18 15:14:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:48,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:48,378 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:48,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-01-18 15:14:48,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:48,579 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:48,579 INFO L85 PathProgramCache]: Analyzing trace with hash -333652906, now seen corresponding path program 336 times [2022-01-18 15:14:48,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:48,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944444888] [2022-01-18 15:14:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:48,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:48,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:48,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944444888] [2022-01-18 15:14:48,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944444888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:48,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184771414] [2022-01-18 15:14:48,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:48,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:48,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:48,707 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:48,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-01-18 15:14:48,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:14:48,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:48,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:48,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:48,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:48,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:48,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:48,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:48,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:14:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:48,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:49,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:49,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:49,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:49,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:49,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:49,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:49,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184771414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:49,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:49,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:14:49,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301361233] [2022-01-18 15:14:49,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:49,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:14:49,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:49,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:14:49,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:14:49,192 INFO L87 Difference]: Start difference. First operand 680 states and 2220 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:50,229 INFO L93 Difference]: Finished difference Result 1231 states and 3816 transitions. [2022-01-18 15:14:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:14:50,229 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:50,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:50,231 INFO L225 Difference]: With dead ends: 1231 [2022-01-18 15:14:50,231 INFO L226 Difference]: Without dead ends: 1212 [2022-01-18 15:14:50,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:14:50,231 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 182 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:50,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 273 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 913 Invalid, 0 Unknown, 206 Unchecked, 0.4s Time] [2022-01-18 15:14:50,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2022-01-18 15:14:50,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 681. [2022-01-18 15:14:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 3.2705882352941176) internal successors, (2224), 680 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 2224 transitions. [2022-01-18 15:14:50,241 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 2224 transitions. Word has length 21 [2022-01-18 15:14:50,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:50,241 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 2224 transitions. [2022-01-18 15:14:50,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:50,241 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 2224 transitions. [2022-01-18 15:14:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:50,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:50,242 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:50,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-01-18 15:14:50,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:50,442 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:50,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1913959446, now seen corresponding path program 337 times [2022-01-18 15:14:50,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:50,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591457854] [2022-01-18 15:14:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:50,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:50,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:50,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591457854] [2022-01-18 15:14:50,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591457854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:50,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019328024] [2022-01-18 15:14:50,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:50,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:50,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:50,591 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:50,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-01-18 15:14:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:50,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:50,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:50,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:50,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:50,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:50,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:50,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:14:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:50,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:51,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:51,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:51,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:51,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:51,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:51,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:51,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019328024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:51,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:51,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:14:51,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643571299] [2022-01-18 15:14:51,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:51,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:14:51,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:51,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:14:51,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:14:51,142 INFO L87 Difference]: Start difference. First operand 681 states and 2224 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:51,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:51,690 INFO L93 Difference]: Finished difference Result 1064 states and 3397 transitions. [2022-01-18 15:14:51,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:14:51,691 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:51,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:51,692 INFO L225 Difference]: With dead ends: 1064 [2022-01-18 15:14:51,692 INFO L226 Difference]: Without dead ends: 1045 [2022-01-18 15:14:51,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:14:51,693 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:51,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 275 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 697 Invalid, 0 Unknown, 227 Unchecked, 0.3s Time] [2022-01-18 15:14:51,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-01-18 15:14:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 677. [2022-01-18 15:14:51,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.2662721893491122) internal successors, (2208), 676 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2208 transitions. [2022-01-18 15:14:51,701 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2208 transitions. Word has length 21 [2022-01-18 15:14:51,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:51,701 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 2208 transitions. [2022-01-18 15:14:51,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:51,701 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2208 transitions. [2022-01-18 15:14:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:51,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:51,702 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:51,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:51,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2022-01-18 15:14:51,902 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1327307979, now seen corresponding path program 338 times [2022-01-18 15:14:51,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:51,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865404342] [2022-01-18 15:14:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:51,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:52,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:52,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865404342] [2022-01-18 15:14:52,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865404342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:52,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558337505] [2022-01-18 15:14:52,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:52,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:52,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:52,007 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:52,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-01-18 15:14:52,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:52,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:52,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:52,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:52,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:52,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:52,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:52,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:52,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:52,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:14:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:52,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:52,601 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:52,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:52,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:52,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:52,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:52,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:52,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558337505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:52,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:52,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:14:52,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734009834] [2022-01-18 15:14:52,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:52,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:52,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:52,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:52,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:52,692 INFO L87 Difference]: Start difference. First operand 677 states and 2208 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:52,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:52,793 INFO L93 Difference]: Finished difference Result 797 states and 2545 transitions. [2022-01-18 15:14:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:14:52,793 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:52,794 INFO L225 Difference]: With dead ends: 797 [2022-01-18 15:14:52,794 INFO L226 Difference]: Without dead ends: 775 [2022-01-18 15:14:52,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:52,794 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 54 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:52,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 170 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 168 Unchecked, 0.1s Time] [2022-01-18 15:14:52,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-01-18 15:14:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 677. [2022-01-18 15:14:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.2662721893491122) internal successors, (2208), 676 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2208 transitions. [2022-01-18 15:14:52,801 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2208 transitions. Word has length 21 [2022-01-18 15:14:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:52,801 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 2208 transitions. [2022-01-18 15:14:52,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2208 transitions. [2022-01-18 15:14:52,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:52,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:52,802 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:52,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Ended with exit code 0 [2022-01-18 15:14:53,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2022-01-18 15:14:53,003 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash 844040781, now seen corresponding path program 339 times [2022-01-18 15:14:53,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:53,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118955794] [2022-01-18 15:14:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:53,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:53,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:53,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118955794] [2022-01-18 15:14:53,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118955794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:53,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584582583] [2022-01-18 15:14:53,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:14:53,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:53,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:53,094 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:53,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-01-18 15:14:53,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:14:53,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:53,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:14:53,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:53,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:53,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:53,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:53,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:53,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:53,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:14:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:53,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:53,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:53,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:53,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:53,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:53,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:53,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:53,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584582583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:53,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:53,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-01-18 15:14:53,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644229646] [2022-01-18 15:14:53,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:53,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:14:53,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:53,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:14:53,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:14:53,851 INFO L87 Difference]: Start difference. First operand 677 states and 2208 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:54,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:54,798 INFO L93 Difference]: Finished difference Result 1202 states and 3747 transitions. [2022-01-18 15:14:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:14:54,798 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:54,800 INFO L225 Difference]: With dead ends: 1202 [2022-01-18 15:14:54,800 INFO L226 Difference]: Without dead ends: 1148 [2022-01-18 15:14:54,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:14:54,800 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 129 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:54,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 309 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 860 Invalid, 0 Unknown, 124 Unchecked, 0.3s Time] [2022-01-18 15:14:54,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-01-18 15:14:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 699. [2022-01-18 15:14:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.2851002865329515) internal successors, (2293), 698 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:54,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2293 transitions. [2022-01-18 15:14:54,809 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2293 transitions. Word has length 21 [2022-01-18 15:14:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:54,810 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2293 transitions. [2022-01-18 15:14:54,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:54,810 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2293 transitions. [2022-01-18 15:14:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:54,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:54,810 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:54,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Ended with exit code 0 [2022-01-18 15:14:55,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:55,011 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:55,011 INFO L85 PathProgramCache]: Analyzing trace with hash -11515947, now seen corresponding path program 340 times [2022-01-18 15:14:55,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:55,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927670003] [2022-01-18 15:14:55,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:55,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:55,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:55,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:55,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927670003] [2022-01-18 15:14:55,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927670003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:55,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776148539] [2022-01-18 15:14:55,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:14:55,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:55,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:55,119 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:55,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-01-18 15:14:55,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:14:55,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:55,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:55,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:55,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:55,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:55,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:55,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:55,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:55,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:55,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:55,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:55,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:55,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:55,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:55,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:55,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:55,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776148539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:55,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:55,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:14:55,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129347876] [2022-01-18 15:14:55,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:55,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:14:55,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:55,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:14:55,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:55,816 INFO L87 Difference]: Start difference. First operand 699 states and 2293 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:55,977 INFO L93 Difference]: Finished difference Result 862 states and 2754 transitions. [2022-01-18 15:14:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:14:55,978 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:55,979 INFO L225 Difference]: With dead ends: 862 [2022-01-18 15:14:55,979 INFO L226 Difference]: Without dead ends: 792 [2022-01-18 15:14:55,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:55,979 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:55,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 167 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 446 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-01-18 15:14:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-01-18 15:14:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 703. [2022-01-18 15:14:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.282051282051282) internal successors, (2304), 702 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2304 transitions. [2022-01-18 15:14:55,987 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2304 transitions. Word has length 21 [2022-01-18 15:14:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:55,987 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 2304 transitions. [2022-01-18 15:14:55,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2304 transitions. [2022-01-18 15:14:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:55,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:55,988 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:56,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2022-01-18 15:14:56,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:56,188 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:56,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:56,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1891058358, now seen corresponding path program 341 times [2022-01-18 15:14:56,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:56,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845462525] [2022-01-18 15:14:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:56,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:56,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:56,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845462525] [2022-01-18 15:14:56,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845462525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:56,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011067312] [2022-01-18 15:14:56,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:14:56,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:56,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:56,288 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:56,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-01-18 15:14:56,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:56,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:56,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:56,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:56,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:56,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:56,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:14:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:56,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:56,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:56,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:14:56,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:56,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:56,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:56,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:56,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011067312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:56,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:56,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:14:56,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373366578] [2022-01-18 15:14:56,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:56,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:14:56,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:56,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:14:56,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:14:56,688 INFO L87 Difference]: Start difference. First operand 703 states and 2304 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:57,488 INFO L93 Difference]: Finished difference Result 1265 states and 3974 transitions. [2022-01-18 15:14:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:14:57,488 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:57,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:57,490 INFO L225 Difference]: With dead ends: 1265 [2022-01-18 15:14:57,490 INFO L226 Difference]: Without dead ends: 1242 [2022-01-18 15:14:57,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:14:57,491 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 138 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:57,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 267 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:14:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-01-18 15:14:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 703. [2022-01-18 15:14:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.282051282051282) internal successors, (2304), 702 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2304 transitions. [2022-01-18 15:14:57,501 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2304 transitions. Word has length 21 [2022-01-18 15:14:57,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:57,501 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 2304 transitions. [2022-01-18 15:14:57,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2304 transitions. [2022-01-18 15:14:57,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:57,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:57,502 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:57,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Ended with exit code 0 [2022-01-18 15:14:57,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2022-01-18 15:14:57,702 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:57,703 INFO L85 PathProgramCache]: Analyzing trace with hash 446944411, now seen corresponding path program 342 times [2022-01-18 15:14:57,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:57,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851228250] [2022-01-18 15:14:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:57,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:57,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:57,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851228250] [2022-01-18 15:14:57,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851228250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:57,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856527085] [2022-01-18 15:14:57,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:14:57,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:57,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:57,847 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:57,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-01-18 15:14:57,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:14:57,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:57,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:57,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:57,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:57,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:58,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:58,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:14:58,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:58,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:14:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:58,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:58,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:58,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:58,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:58,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:58,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:58,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:58,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856527085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:58,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:58,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:14:58,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844195153] [2022-01-18 15:14:58,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:58,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:14:58,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:58,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:14:58,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:14:58,329 INFO L87 Difference]: Start difference. First operand 703 states and 2304 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:58,659 INFO L93 Difference]: Finished difference Result 1184 states and 3724 transitions. [2022-01-18 15:14:58,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:14:58,659 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:58,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:58,661 INFO L225 Difference]: With dead ends: 1184 [2022-01-18 15:14:58,661 INFO L226 Difference]: Without dead ends: 1163 [2022-01-18 15:14:58,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:14:58,661 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:58,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 235 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 503 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-01-18 15:14:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-01-18 15:14:58,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 711. [2022-01-18 15:14:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 3.2929577464788733) internal successors, (2338), 710 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:58,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 2338 transitions. [2022-01-18 15:14:58,670 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 2338 transitions. Word has length 21 [2022-01-18 15:14:58,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:58,670 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 2338 transitions. [2022-01-18 15:14:58,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 2338 transitions. [2022-01-18 15:14:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:58,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:58,671 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:58,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Ended with exit code 0 [2022-01-18 15:14:58,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2022-01-18 15:14:58,872 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:58,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:58,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1810346795, now seen corresponding path program 343 times [2022-01-18 15:14:58,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:58,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74844135] [2022-01-18 15:14:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:58,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:58,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:58,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74844135] [2022-01-18 15:14:58,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74844135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:58,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082823677] [2022-01-18 15:14:58,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:14:58,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:58,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:58,984 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:58,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-01-18 15:14:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:59,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:59,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:59,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:59,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:59,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:59,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:59,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:14:59,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:14:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:59,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:14:59,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:59,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:14:59,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:59,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:14:59,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:14:59,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:14:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:59,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082823677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:14:59,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:14:59,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:14:59,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564326765] [2022-01-18 15:14:59,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:14:59,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:14:59,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:14:59,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:14:59,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:59,390 INFO L87 Difference]: Start difference. First operand 711 states and 2338 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:14:59,510 INFO L93 Difference]: Finished difference Result 800 states and 2596 transitions. [2022-01-18 15:14:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:14:59,511 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:14:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:14:59,512 INFO L225 Difference]: With dead ends: 800 [2022-01-18 15:14:59,512 INFO L226 Difference]: Without dead ends: 778 [2022-01-18 15:14:59,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:14:59,512 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:14:59,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 130 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 332 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-01-18 15:14:59,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-01-18 15:14:59,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 712. [2022-01-18 15:14:59,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.2953586497890295) internal successors, (2343), 711 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:59,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2343 transitions. [2022-01-18 15:14:59,519 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2343 transitions. Word has length 21 [2022-01-18 15:14:59,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:14:59,519 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 2343 transitions. [2022-01-18 15:14:59,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:14:59,520 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2343 transitions. [2022-01-18 15:14:59,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:14:59,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:14:59,520 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:14:59,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 [2022-01-18 15:14:59,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-01-18 15:14:59,731 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:14:59,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:14:59,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1707736245, now seen corresponding path program 344 times [2022-01-18 15:14:59,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:14:59,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645619548] [2022-01-18 15:14:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:14:59,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:14:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:14:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:59,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:14:59,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645619548] [2022-01-18 15:14:59,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645619548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:14:59,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215366239] [2022-01-18 15:14:59,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:14:59,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:14:59,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:14:59,828 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:14:59,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-01-18 15:14:59,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:14:59,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:14:59,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:14:59,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:14:59,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:59,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:14:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:14:59,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:00,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:00,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:00,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:00,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:00,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:00,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:00,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215366239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:00,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:00,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:15:00,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074359903] [2022-01-18 15:15:00,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:00,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:00,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:00,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:00,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:00,157 INFO L87 Difference]: Start difference. First operand 712 states and 2343 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:00,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:00,347 INFO L93 Difference]: Finished difference Result 838 states and 2688 transitions. [2022-01-18 15:15:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:15:00,347 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:00,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:00,349 INFO L225 Difference]: With dead ends: 838 [2022-01-18 15:15:00,349 INFO L226 Difference]: Without dead ends: 816 [2022-01-18 15:15:00,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:00,349 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:00,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 134 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-01-18 15:15:00,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 713. [2022-01-18 15:15:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.2907303370786516) internal successors, (2343), 712 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2343 transitions. [2022-01-18 15:15:00,362 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2343 transitions. Word has length 21 [2022-01-18 15:15:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:00,362 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 2343 transitions. [2022-01-18 15:15:00,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2343 transitions. [2022-01-18 15:15:00,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:00,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:00,363 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:00,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Ended with exit code 0 [2022-01-18 15:15:00,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-01-18 15:15:00,575 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:00,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:00,575 INFO L85 PathProgramCache]: Analyzing trace with hash 830280268, now seen corresponding path program 345 times [2022-01-18 15:15:00,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:00,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693564087] [2022-01-18 15:15:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:00,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:00,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:00,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693564087] [2022-01-18 15:15:00,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693564087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:00,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575836376] [2022-01-18 15:15:00,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:00,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:00,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:00,711 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:00,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-01-18 15:15:00,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:15:00,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:00,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:00,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:00,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:00,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:00,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:00,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:00,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:00,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:15:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:00,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:01,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:01,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:01,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:01,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:01,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:01,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:01,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575836376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:01,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:01,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:15:01,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421753390] [2022-01-18 15:15:01,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:01,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:15:01,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:01,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:15:01,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:01,161 INFO L87 Difference]: Start difference. First operand 713 states and 2343 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:01,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:01,964 INFO L93 Difference]: Finished difference Result 1278 states and 3983 transitions. [2022-01-18 15:15:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:15:01,964 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:01,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:01,966 INFO L225 Difference]: With dead ends: 1278 [2022-01-18 15:15:01,966 INFO L226 Difference]: Without dead ends: 1232 [2022-01-18 15:15:01,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=269, Invalid=1537, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:15:01,966 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 127 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:01,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 222 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 650 Invalid, 0 Unknown, 145 Unchecked, 0.3s Time] [2022-01-18 15:15:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-01-18 15:15:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 715. [2022-01-18 15:15:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 3.291316526610644) internal successors, (2350), 714 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2350 transitions. [2022-01-18 15:15:01,976 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2350 transitions. Word has length 21 [2022-01-18 15:15:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:01,976 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 2350 transitions. [2022-01-18 15:15:01,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:01,976 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2350 transitions. [2022-01-18 15:15:01,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:01,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:01,977 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:01,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:02,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-01-18 15:15:02,177 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:02,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1433521265, now seen corresponding path program 346 times [2022-01-18 15:15:02,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:02,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115191584] [2022-01-18 15:15:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:02,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:02,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:02,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115191584] [2022-01-18 15:15:02,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115191584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:02,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537727137] [2022-01-18 15:15:02,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:02,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:02,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:02,274 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:02,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-01-18 15:15:02,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:02,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:02,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:02,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:02,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:02,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:02,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:02,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:02,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:02,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:02,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:02,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:02,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:02,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:02,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537727137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:02,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:02,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:15:02,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176949513] [2022-01-18 15:15:02,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:02,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:02,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:02,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:02,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:02,678 INFO L87 Difference]: Start difference. First operand 715 states and 2350 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:03,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:03,497 INFO L93 Difference]: Finished difference Result 1171 states and 3698 transitions. [2022-01-18 15:15:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:15:03,497 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:03,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:03,499 INFO L225 Difference]: With dead ends: 1171 [2022-01-18 15:15:03,499 INFO L226 Difference]: Without dead ends: 1144 [2022-01-18 15:15:03,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:15:03,499 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 96 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:03,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 289 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:15:03,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-01-18 15:15:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 720. [2022-01-18 15:15:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 3.3045897079276774) internal successors, (2376), 719 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2376 transitions. [2022-01-18 15:15:03,508 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2376 transitions. Word has length 21 [2022-01-18 15:15:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:03,509 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 2376 transitions. [2022-01-18 15:15:03,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2376 transitions. [2022-01-18 15:15:03,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:03,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:03,509 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:03,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-01-18 15:15:03,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2022-01-18 15:15:03,710 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:03,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:03,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1706836641, now seen corresponding path program 347 times [2022-01-18 15:15:03,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:03,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219914926] [2022-01-18 15:15:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:03,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:03,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:03,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219914926] [2022-01-18 15:15:03,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219914926] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:03,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969849798] [2022-01-18 15:15:03,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:03,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:03,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:03,813 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:03,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-01-18 15:15:03,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:03,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:03,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:03,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:03,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:03,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:03,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:03,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:03,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:03,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:04,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:04,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:04,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:04,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:04,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:04,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:04,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:04,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969849798] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:04,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:04,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:15:04,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402902945] [2022-01-18 15:15:04,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:04,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:15:04,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:04,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:15:04,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:15:04,201 INFO L87 Difference]: Start difference. First operand 720 states and 2376 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:04,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:04,339 INFO L93 Difference]: Finished difference Result 818 states and 2659 transitions. [2022-01-18 15:15:04,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:04,339 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:04,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:04,340 INFO L225 Difference]: With dead ends: 818 [2022-01-18 15:15:04,340 INFO L226 Difference]: Without dead ends: 789 [2022-01-18 15:15:04,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:15:04,340 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:04,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 125 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 383 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-01-18 15:15:04,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-01-18 15:15:04,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 719. [2022-01-18 15:15:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.3008356545961) internal successors, (2370), 718 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2370 transitions. [2022-01-18 15:15:04,351 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2370 transitions. Word has length 21 [2022-01-18 15:15:04,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:04,351 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 2370 transitions. [2022-01-18 15:15:04,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:04,351 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2370 transitions. [2022-01-18 15:15:04,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:04,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:04,352 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:04,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:04,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2022-01-18 15:15:04,555 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:04,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:04,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2036655875, now seen corresponding path program 348 times [2022-01-18 15:15:04,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:04,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646171728] [2022-01-18 15:15:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:04,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:04,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:04,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646171728] [2022-01-18 15:15:04,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646171728] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:04,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266221913] [2022-01-18 15:15:04,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:04,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:04,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:04,661 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:04,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-01-18 15:15:04,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:15:04,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:04,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:04,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:04,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:04,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:04,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:04,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:04,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:04,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:04,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:04,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:04,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:05,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:05,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:05,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:05,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:05,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266221913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:05,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:05,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:15:05,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148632003] [2022-01-18 15:15:05,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:05,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:05,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:05,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:05,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:05,068 INFO L87 Difference]: Start difference. First operand 719 states and 2370 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:05,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:05,247 INFO L93 Difference]: Finished difference Result 828 states and 2672 transitions. [2022-01-18 15:15:05,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:15:05,247 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:05,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:05,248 INFO L225 Difference]: With dead ends: 828 [2022-01-18 15:15:05,248 INFO L226 Difference]: Without dead ends: 799 [2022-01-18 15:15:05,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:05,249 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:05,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 217 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 481 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2022-01-18 15:15:05,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-01-18 15:15:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 717. [2022-01-18 15:15:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.3002793296089385) internal successors, (2363), 716 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2363 transitions. [2022-01-18 15:15:05,257 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2363 transitions. Word has length 21 [2022-01-18 15:15:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:05,257 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 2363 transitions. [2022-01-18 15:15:05,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2363 transitions. [2022-01-18 15:15:05,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:05,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:05,258 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:05,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Ended with exit code 0 [2022-01-18 15:15:05,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:05,458 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:05,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:05,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1251004468, now seen corresponding path program 349 times [2022-01-18 15:15:05,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:05,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258342637] [2022-01-18 15:15:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:05,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:05,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:05,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258342637] [2022-01-18 15:15:05,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258342637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:05,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031610309] [2022-01-18 15:15:05,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:05,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:05,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:05,547 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:05,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-01-18 15:15:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:05,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:05,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:05,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:05,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:05,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:05,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:05,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:05,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:05,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:05,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:05,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:05,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031610309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:05,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:05,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:15:05,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482242303] [2022-01-18 15:15:05,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:05,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:05,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:05,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:05,944 INFO L87 Difference]: Start difference. First operand 717 states and 2363 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:06,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:06,632 INFO L93 Difference]: Finished difference Result 1174 states and 3702 transitions. [2022-01-18 15:15:06,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:15:06,633 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:06,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:06,635 INFO L225 Difference]: With dead ends: 1174 [2022-01-18 15:15:06,635 INFO L226 Difference]: Without dead ends: 1155 [2022-01-18 15:15:06,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:15:06,635 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:06,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 235 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:06,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-01-18 15:15:06,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 717. [2022-01-18 15:15:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.3002793296089385) internal successors, (2363), 716 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:06,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2363 transitions. [2022-01-18 15:15:06,645 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2363 transitions. Word has length 21 [2022-01-18 15:15:06,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:06,645 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 2363 transitions. [2022-01-18 15:15:06,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2363 transitions. [2022-01-18 15:15:06,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:06,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:06,646 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:06,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-01-18 15:15:06,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:06,847 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:06,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:06,847 INFO L85 PathProgramCache]: Analyzing trace with hash -40628851, now seen corresponding path program 350 times [2022-01-18 15:15:06,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:06,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289925307] [2022-01-18 15:15:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:06,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:06,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:06,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289925307] [2022-01-18 15:15:06,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289925307] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:06,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510040255] [2022-01-18 15:15:06,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:06,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:06,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:06,940 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:06,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-01-18 15:15:06,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:06,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:06,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:07,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:07,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:07,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:07,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:07,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:07,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:07,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:07,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:07,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:07,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510040255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:07,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:07,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:15:07,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272389485] [2022-01-18 15:15:07,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:07,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:07,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:07,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:07,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:07,302 INFO L87 Difference]: Start difference. First operand 717 states and 2363 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:07,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:07,739 INFO L93 Difference]: Finished difference Result 1018 states and 3250 transitions. [2022-01-18 15:15:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:15:07,739 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:07,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:07,740 INFO L225 Difference]: With dead ends: 1018 [2022-01-18 15:15:07,740 INFO L226 Difference]: Without dead ends: 997 [2022-01-18 15:15:07,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:15:07,741 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 103 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:07,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 178 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-01-18 15:15:07,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 713. [2022-01-18 15:15:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.2907303370786516) internal successors, (2343), 712 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:07,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2343 transitions. [2022-01-18 15:15:07,749 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2343 transitions. Word has length 21 [2022-01-18 15:15:07,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:07,749 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 2343 transitions. [2022-01-18 15:15:07,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2343 transitions. [2022-01-18 15:15:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:07,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:07,750 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:07,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Ended with exit code 0 [2022-01-18 15:15:07,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:07,951 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:07,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:07,951 INFO L85 PathProgramCache]: Analyzing trace with hash -175037118, now seen corresponding path program 351 times [2022-01-18 15:15:07,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:07,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025562707] [2022-01-18 15:15:07,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:07,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:08,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:08,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025562707] [2022-01-18 15:15:08,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025562707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:08,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373254952] [2022-01-18 15:15:08,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:08,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:08,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:08,047 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:08,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-01-18 15:15:08,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:15:08,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:08,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:08,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:08,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:08,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:08,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:08,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:08,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:08,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:08,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:08,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:15:08,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:08,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:08,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373254952] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:08,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:08,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:15:08,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419063342] [2022-01-18 15:15:08,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:08,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:08,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:08,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:08,411 INFO L87 Difference]: Start difference. First operand 713 states and 2343 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:09,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:09,178 INFO L93 Difference]: Finished difference Result 1319 states and 4116 transitions. [2022-01-18 15:15:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:15:09,178 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:09,180 INFO L225 Difference]: With dead ends: 1319 [2022-01-18 15:15:09,180 INFO L226 Difference]: Without dead ends: 1300 [2022-01-18 15:15:09,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:15:09,181 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 221 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:09,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 243 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:09,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-01-18 15:15:09,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 721. [2022-01-18 15:15:09,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.298611111111111) internal successors, (2375), 720 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2375 transitions. [2022-01-18 15:15:09,191 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2375 transitions. Word has length 21 [2022-01-18 15:15:09,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:09,191 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 2375 transitions. [2022-01-18 15:15:09,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2375 transitions. [2022-01-18 15:15:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:09,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:09,192 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:09,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:09,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:09,392 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:09,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:09,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1770428957, now seen corresponding path program 352 times [2022-01-18 15:15:09,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:09,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367215725] [2022-01-18 15:15:09,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:09,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:09,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:09,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367215725] [2022-01-18 15:15:09,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367215725] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:09,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266040134] [2022-01-18 15:15:09,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:09,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:09,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:09,475 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:09,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-01-18 15:15:09,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:09,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:09,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:09,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:09,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:09,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:09,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:09,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:09,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:15:09,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:09,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:15:09,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:09,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:15:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:09,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266040134] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:09,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:09,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-18 15:15:09,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479849855] [2022-01-18 15:15:09,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:09,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:15:09,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:09,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:15:09,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:15:09,809 INFO L87 Difference]: Start difference. First operand 721 states and 2375 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:10,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:10,055 INFO L93 Difference]: Finished difference Result 1029 states and 3281 transitions. [2022-01-18 15:15:10,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:15:10,055 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:10,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:10,057 INFO L225 Difference]: With dead ends: 1029 [2022-01-18 15:15:10,057 INFO L226 Difference]: Without dead ends: 990 [2022-01-18 15:15:10,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:10,057 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 91 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:10,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 133 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:10,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-01-18 15:15:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 725. [2022-01-18 15:15:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 3.2955801104972378) internal successors, (2386), 724 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 2386 transitions. [2022-01-18 15:15:10,066 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 2386 transitions. Word has length 21 [2022-01-18 15:15:10,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:10,066 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 2386 transitions. [2022-01-18 15:15:10,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:10,066 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 2386 transitions. [2022-01-18 15:15:10,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:10,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:10,067 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:10,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Ended with exit code 0 [2022-01-18 15:15:10,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:10,267 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:10,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:10,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2117737310, now seen corresponding path program 353 times [2022-01-18 15:15:10,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:10,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686968524] [2022-01-18 15:15:10,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:10,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:10,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:10,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686968524] [2022-01-18 15:15:10,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686968524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:10,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343710969] [2022-01-18 15:15:10,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:10,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:10,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:10,366 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:10,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-01-18 15:15:10,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:15:10,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:10,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:10,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:10,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:10,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:10,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:10,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:10,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:10,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:10,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:15:10,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:10,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:10,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343710969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:10,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:10,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:15:10,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118969108] [2022-01-18 15:15:10,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:10,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:10,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:10,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:10,720 INFO L87 Difference]: Start difference. First operand 725 states and 2386 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:11,563 INFO L93 Difference]: Finished difference Result 1403 states and 4396 transitions. [2022-01-18 15:15:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:15:11,564 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:11,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:11,566 INFO L225 Difference]: With dead ends: 1403 [2022-01-18 15:15:11,566 INFO L226 Difference]: Without dead ends: 1384 [2022-01-18 15:15:11,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:15:11,566 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 147 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:11,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 338 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:15:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-01-18 15:15:11,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 735. [2022-01-18 15:15:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.301089918256131) internal successors, (2423), 734 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:11,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2423 transitions. [2022-01-18 15:15:11,585 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2423 transitions. Word has length 21 [2022-01-18 15:15:11,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:11,585 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2423 transitions. [2022-01-18 15:15:11,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:11,585 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2423 transitions. [2022-01-18 15:15:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:11,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:11,586 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:11,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:11,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2022-01-18 15:15:11,786 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:11,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:11,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1179166786, now seen corresponding path program 354 times [2022-01-18 15:15:11,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:11,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988180860] [2022-01-18 15:15:11,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:11,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:11,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:11,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988180860] [2022-01-18 15:15:11,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988180860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:11,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322987821] [2022-01-18 15:15:11,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:11,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:11,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:11,882 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:11,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-01-18 15:15:11,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:15:11,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:11,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:11,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:11,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:11,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:12,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:12,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:12,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:12,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:12,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:12,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:12,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:15:12,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:12,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:12,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322987821] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:12,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:12,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:15:12,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061995015] [2022-01-18 15:15:12,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:12,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:12,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:12,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:12,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:12,270 INFO L87 Difference]: Start difference. First operand 735 states and 2423 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:13,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:13,012 INFO L93 Difference]: Finished difference Result 1421 states and 4453 transitions. [2022-01-18 15:15:13,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:15:13,012 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:13,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:13,015 INFO L225 Difference]: With dead ends: 1421 [2022-01-18 15:15:13,015 INFO L226 Difference]: Without dead ends: 1398 [2022-01-18 15:15:13,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:15:13,015 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 156 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:13,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 292 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:15:13,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2022-01-18 15:15:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 738. [2022-01-18 15:15:13,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.3188602442333788) internal successors, (2446), 737 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2446 transitions. [2022-01-18 15:15:13,025 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2446 transitions. Word has length 21 [2022-01-18 15:15:13,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:13,025 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 2446 transitions. [2022-01-18 15:15:13,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:13,025 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2446 transitions. [2022-01-18 15:15:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:13,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:13,026 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:13,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Ended with exit code 0 [2022-01-18 15:15:13,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2022-01-18 15:15:13,227 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:13,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1197037461, now seen corresponding path program 355 times [2022-01-18 15:15:13,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:13,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830380145] [2022-01-18 15:15:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:13,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:13,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:13,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830380145] [2022-01-18 15:15:13,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830380145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:13,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969764081] [2022-01-18 15:15:13,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:13,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:13,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:13,319 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:13,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-01-18 15:15:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:13,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:13,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:13,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:13,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:13,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:13,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:13,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:13,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:13,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:15:13,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:13,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:13,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969764081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:13,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:13,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 16 [2022-01-18 15:15:13,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491844225] [2022-01-18 15:15:13,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:13,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:15:13,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:13,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:15:13,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:15:13,573 INFO L87 Difference]: Start difference. First operand 738 states and 2446 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:13,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:13,807 INFO L93 Difference]: Finished difference Result 1066 states and 3413 transitions. [2022-01-18 15:15:13,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:13,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:13,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:13,809 INFO L225 Difference]: With dead ends: 1066 [2022-01-18 15:15:13,809 INFO L226 Difference]: Without dead ends: 1044 [2022-01-18 15:15:13,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:15:13,809 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:13,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 173 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:13,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-01-18 15:15:13,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 741. [2022-01-18 15:15:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.3162162162162163) internal successors, (2454), 740 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2454 transitions. [2022-01-18 15:15:13,818 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2454 transitions. Word has length 21 [2022-01-18 15:15:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:13,818 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2454 transitions. [2022-01-18 15:15:13,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:13,819 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2454 transitions. [2022-01-18 15:15:13,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:13,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:13,819 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:13,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:14,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-01-18 15:15:14,020 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:14,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1337997723, now seen corresponding path program 356 times [2022-01-18 15:15:14,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:14,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087689684] [2022-01-18 15:15:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:14,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:14,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:14,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087689684] [2022-01-18 15:15:14,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087689684] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:14,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479090088] [2022-01-18 15:15:14,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:14,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:14,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:14,101 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:14,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-01-18 15:15:14,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:14,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:14,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:14,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:14,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:14,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:14,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:14,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:14,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:14,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:14,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:15:14,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:14,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:14,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479090088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:14,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:14,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 16 [2022-01-18 15:15:14,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416084330] [2022-01-18 15:15:14,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:14,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:15:14,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:15:14,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:15:14,377 INFO L87 Difference]: Start difference. First operand 741 states and 2454 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:14,641 INFO L93 Difference]: Finished difference Result 1044 states and 3361 transitions. [2022-01-18 15:15:14,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:14,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:14,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:14,643 INFO L225 Difference]: With dead ends: 1044 [2022-01-18 15:15:14,643 INFO L226 Difference]: Without dead ends: 1022 [2022-01-18 15:15:14,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:15:14,643 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:14,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 178 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-01-18 15:15:14,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 744. [2022-01-18 15:15:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.313593539703903) internal successors, (2462), 743 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2462 transitions. [2022-01-18 15:15:14,652 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2462 transitions. Word has length 21 [2022-01-18 15:15:14,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:14,652 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 2462 transitions. [2022-01-18 15:15:14,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:14,652 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2462 transitions. [2022-01-18 15:15:14,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:14,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:14,653 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:14,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Ended with exit code 0 [2022-01-18 15:15:14,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2022-01-18 15:15:14,853 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:14,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:14,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1268495015, now seen corresponding path program 357 times [2022-01-18 15:15:14,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:14,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952216428] [2022-01-18 15:15:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:14,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:14,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:14,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952216428] [2022-01-18 15:15:14,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952216428] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:14,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177940207] [2022-01-18 15:15:14,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:14,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:14,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:14,935 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:14,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-01-18 15:15:14,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:15:14,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:14,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:14,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:14,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:15,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:15,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:15,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:15,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:15,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:15,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:15,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:15:15,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:15,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:15,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177940207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:15,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:15,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 16 [2022-01-18 15:15:15,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948864109] [2022-01-18 15:15:15,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:15,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:15:15,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:15,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:15:15,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:15:15,212 INFO L87 Difference]: Start difference. First operand 744 states and 2462 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:15,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:15,458 INFO L93 Difference]: Finished difference Result 1045 states and 3356 transitions. [2022-01-18 15:15:15,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:15,459 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:15,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:15,460 INFO L225 Difference]: With dead ends: 1045 [2022-01-18 15:15:15,460 INFO L226 Difference]: Without dead ends: 1016 [2022-01-18 15:15:15,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:15:15,460 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:15,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 179 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-01-18 15:15:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 735. [2022-01-18 15:15:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.310626702997275) internal successors, (2430), 734 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2430 transitions. [2022-01-18 15:15:15,469 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2430 transitions. Word has length 21 [2022-01-18 15:15:15,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:15,469 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2430 transitions. [2022-01-18 15:15:15,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:15,469 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2430 transitions. [2022-01-18 15:15:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:15,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:15,470 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:15,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Ended with exit code 0 [2022-01-18 15:15:15,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:15,670 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:15,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:15,671 INFO L85 PathProgramCache]: Analyzing trace with hash 513973068, now seen corresponding path program 358 times [2022-01-18 15:15:15,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:15,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577879942] [2022-01-18 15:15:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:15,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:15,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:15,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577879942] [2022-01-18 15:15:15,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577879942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:15,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489898173] [2022-01-18 15:15:15,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:15,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:15,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:15,759 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:15,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-01-18 15:15:15,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:15,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:15,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:15,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:15,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:15,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:15,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:15,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:15,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:16,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:16,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:15:16,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:16,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:16,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489898173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:16,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:16,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-18 15:15:16,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508623314] [2022-01-18 15:15:16,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:16,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:15:16,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:16,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:15:16,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:15:16,072 INFO L87 Difference]: Start difference. First operand 735 states and 2430 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:16,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:16,925 INFO L93 Difference]: Finished difference Result 1279 states and 4006 transitions. [2022-01-18 15:15:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:15:16,925 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:16,927 INFO L225 Difference]: With dead ends: 1279 [2022-01-18 15:15:16,928 INFO L226 Difference]: Without dead ends: 1256 [2022-01-18 15:15:16,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:15:16,928 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 260 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:16,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 236 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:15:16,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2022-01-18 15:15:16,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 729. [2022-01-18 15:15:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.2898351648351647) internal successors, (2395), 728 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2395 transitions. [2022-01-18 15:15:16,938 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2395 transitions. Word has length 21 [2022-01-18 15:15:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:16,938 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 2395 transitions. [2022-01-18 15:15:16,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2395 transitions. [2022-01-18 15:15:16,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:16,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:16,939 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:16,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Ended with exit code 0 [2022-01-18 15:15:17,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:17,139 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash 585430622, now seen corresponding path program 359 times [2022-01-18 15:15:17,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:17,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125166886] [2022-01-18 15:15:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:17,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:17,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:17,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125166886] [2022-01-18 15:15:17,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125166886] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:17,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421948188] [2022-01-18 15:15:17,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:17,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:17,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:17,255 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:17,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-01-18 15:15:17,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:15:17,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:17,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:17,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:17,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:17,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:17,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:17,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:17,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:15:17,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:17,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:15:17,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:17,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:17,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421948188] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:17,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:17,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:15:17,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894130496] [2022-01-18 15:15:17,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:17,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:17,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:17,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:17,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:17,598 INFO L87 Difference]: Start difference. First operand 729 states and 2395 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:17,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:17,974 INFO L93 Difference]: Finished difference Result 997 states and 3177 transitions. [2022-01-18 15:15:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:15:17,974 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:17,975 INFO L225 Difference]: With dead ends: 997 [2022-01-18 15:15:17,975 INFO L226 Difference]: Without dead ends: 978 [2022-01-18 15:15:17,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:15:17,976 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 82 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:17,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 238 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:17,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-01-18 15:15:17,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 727. [2022-01-18 15:15:17,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.293388429752066) internal successors, (2391), 726 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2391 transitions. [2022-01-18 15:15:17,984 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2391 transitions. Word has length 21 [2022-01-18 15:15:17,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:17,984 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 2391 transitions. [2022-01-18 15:15:17,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:17,984 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2391 transitions. [2022-01-18 15:15:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:17,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:17,985 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:18,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Ended with exit code 0 [2022-01-18 15:15:18,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:18,186 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:18,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:18,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1695628131, now seen corresponding path program 360 times [2022-01-18 15:15:18,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:18,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181827481] [2022-01-18 15:15:18,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:18,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:18,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:18,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181827481] [2022-01-18 15:15:18,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181827481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:18,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110964361] [2022-01-18 15:15:18,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:18,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:18,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:18,277 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:18,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-01-18 15:15:18,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:15:18,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:18,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:18,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:18,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:18,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:18,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:18,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:18,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:15:18,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:18,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:15:18,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:18,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:15:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:18,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110964361] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:18,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:18,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:15:18,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393659410] [2022-01-18 15:15:18,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:18,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:18,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:18,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:18,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:18,638 INFO L87 Difference]: Start difference. First operand 727 states and 2391 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:18,992 INFO L93 Difference]: Finished difference Result 1131 states and 3568 transitions. [2022-01-18 15:15:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:15:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:18,994 INFO L225 Difference]: With dead ends: 1131 [2022-01-18 15:15:18,994 INFO L226 Difference]: Without dead ends: 1065 [2022-01-18 15:15:18,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:15:18,994 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 95 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:18,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 227 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-01-18 15:15:19,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 737. [2022-01-18 15:15:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.2894021739130435) internal successors, (2421), 736 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2421 transitions. [2022-01-18 15:15:19,003 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2421 transitions. Word has length 21 [2022-01-18 15:15:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:19,003 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2421 transitions. [2022-01-18 15:15:19,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2421 transitions. [2022-01-18 15:15:19,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:19,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:19,004 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:19,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Ended with exit code 0 [2022-01-18 15:15:19,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:19,204 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:19,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:19,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1846884373, now seen corresponding path program 361 times [2022-01-18 15:15:19,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:19,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558356543] [2022-01-18 15:15:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:19,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:19,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:19,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558356543] [2022-01-18 15:15:19,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558356543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:19,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792588604] [2022-01-18 15:15:19,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:19,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:19,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:19,295 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:19,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-01-18 15:15:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:19,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:19,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:19,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:19,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:19,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:19,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:19,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:19,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:19,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:15:19,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:19,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:19,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792588604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:19,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:19,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 16 [2022-01-18 15:15:19,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222434641] [2022-01-18 15:15:19,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:19,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:15:19,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:19,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:15:19,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:15:19,566 INFO L87 Difference]: Start difference. First operand 737 states and 2421 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:19,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:19,787 INFO L93 Difference]: Finished difference Result 897 states and 2869 transitions. [2022-01-18 15:15:19,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:15:19,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:19,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:19,789 INFO L225 Difference]: With dead ends: 897 [2022-01-18 15:15:19,789 INFO L226 Difference]: Without dead ends: 853 [2022-01-18 15:15:19,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:15:19,789 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:19,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 162 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-01-18 15:15:19,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 737. [2022-01-18 15:15:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.2894021739130435) internal successors, (2421), 736 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:19,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2421 transitions. [2022-01-18 15:15:19,797 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2421 transitions. Word has length 21 [2022-01-18 15:15:19,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:19,797 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2421 transitions. [2022-01-18 15:15:19,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:19,797 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2421 transitions. [2022-01-18 15:15:19,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:19,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:19,798 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:19,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Ended with exit code 0 [2022-01-18 15:15:19,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:19,998 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1662028903, now seen corresponding path program 362 times [2022-01-18 15:15:19,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:19,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221530196] [2022-01-18 15:15:19,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:19,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:20,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:20,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221530196] [2022-01-18 15:15:20,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221530196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:20,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227140565] [2022-01-18 15:15:20,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:20,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:20,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:20,098 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:20,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-01-18 15:15:20,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:20,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:20,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:20,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:20,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:20,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:20,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:20,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:20,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:15:20,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:20,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:15:20,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:20,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:15:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:20,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227140565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:20,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:20,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:15:20,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599795419] [2022-01-18 15:15:20,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:20,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:20,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:20,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:20,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:20,469 INFO L87 Difference]: Start difference. First operand 737 states and 2421 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:21,009 INFO L93 Difference]: Finished difference Result 1176 states and 3669 transitions. [2022-01-18 15:15:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:15:21,010 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:21,011 INFO L225 Difference]: With dead ends: 1176 [2022-01-18 15:15:21,011 INFO L226 Difference]: Without dead ends: 1122 [2022-01-18 15:15:21,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:15:21,012 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 121 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:21,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 299 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:21,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-01-18 15:15:21,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 745. [2022-01-18 15:15:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.295698924731183) internal successors, (2452), 744 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2452 transitions. [2022-01-18 15:15:21,021 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2452 transitions. Word has length 21 [2022-01-18 15:15:21,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:21,021 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2452 transitions. [2022-01-18 15:15:21,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:21,021 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2452 transitions. [2022-01-18 15:15:21,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:21,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:21,022 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:21,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Ended with exit code 0 [2022-01-18 15:15:21,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:21,222 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:21,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:21,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1777381665, now seen corresponding path program 363 times [2022-01-18 15:15:21,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:21,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285712642] [2022-01-18 15:15:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:21,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:21,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:21,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285712642] [2022-01-18 15:15:21,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285712642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:21,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927277936] [2022-01-18 15:15:21,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:21,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:21,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:21,303 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:21,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-01-18 15:15:21,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:15:21,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:21,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:21,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:21,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:21,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:21,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:21,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:21,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:21,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:21,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:21,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:15:21,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:21,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:21,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927277936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:21,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:21,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 16 [2022-01-18 15:15:21,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098014608] [2022-01-18 15:15:21,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:21,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:15:21,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:21,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:15:21,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:15:21,585 INFO L87 Difference]: Start difference. First operand 745 states and 2452 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:21,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:21,802 INFO L93 Difference]: Finished difference Result 977 states and 3105 transitions. [2022-01-18 15:15:21,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:15:21,802 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:21,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:21,803 INFO L225 Difference]: With dead ends: 977 [2022-01-18 15:15:21,804 INFO L226 Difference]: Without dead ends: 919 [2022-01-18 15:15:21,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:15:21,804 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:21,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 158 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-01-18 15:15:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 739. [2022-01-18 15:15:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.296747967479675) internal successors, (2433), 738 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2433 transitions. [2022-01-18 15:15:21,812 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2433 transitions. Word has length 21 [2022-01-18 15:15:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:21,812 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2433 transitions. [2022-01-18 15:15:21,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2433 transitions. [2022-01-18 15:15:21,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:21,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:21,813 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:21,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Ended with exit code 0 [2022-01-18 15:15:22,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:22,013 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:22,013 INFO L85 PathProgramCache]: Analyzing trace with hash 444755217, now seen corresponding path program 364 times [2022-01-18 15:15:22,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:22,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886260418] [2022-01-18 15:15:22,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:22,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:22,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:22,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886260418] [2022-01-18 15:15:22,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886260418] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:22,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310294344] [2022-01-18 15:15:22,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:22,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:22,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:22,107 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:22,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-01-18 15:15:22,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:22,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:22,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:22,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:22,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:22,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:22,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:22,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:22,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:22,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:22,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:22,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:15:22,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:22,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:15:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:22,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310294344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:22,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:22,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:15:22,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415393060] [2022-01-18 15:15:22,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:22,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:22,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:22,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:22,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:22,474 INFO L87 Difference]: Start difference. First operand 739 states and 2433 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:22,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:22,920 INFO L93 Difference]: Finished difference Result 1182 states and 3686 transitions. [2022-01-18 15:15:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:15:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:22,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:22,922 INFO L225 Difference]: With dead ends: 1182 [2022-01-18 15:15:22,922 INFO L226 Difference]: Without dead ends: 1128 [2022-01-18 15:15:22,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:15:22,922 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 90 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:22,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 234 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:22,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-01-18 15:15:22,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 755. [2022-01-18 15:15:22,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.3183023872679045) internal successors, (2502), 754 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:22,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2502 transitions. [2022-01-18 15:15:22,932 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2502 transitions. Word has length 21 [2022-01-18 15:15:22,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:22,932 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2502 transitions. [2022-01-18 15:15:22,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:22,932 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2502 transitions. [2022-01-18 15:15:22,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:22,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:22,933 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:22,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Ended with exit code 0 [2022-01-18 15:15:23,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2022-01-18 15:15:23,133 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:23,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:23,133 INFO L85 PathProgramCache]: Analyzing trace with hash -410801511, now seen corresponding path program 365 times [2022-01-18 15:15:23,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:23,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040992338] [2022-01-18 15:15:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:23,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:23,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:23,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040992338] [2022-01-18 15:15:23,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040992338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:23,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116365016] [2022-01-18 15:15:23,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:23,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:23,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:23,210 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:23,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-01-18 15:15:23,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:15:23,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:23,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:23,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:23,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:23,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:15:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:23,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:23,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:23,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:23,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:23,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:15:23,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:23,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:23,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116365016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:23,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:23,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 18 [2022-01-18 15:15:23,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148784879] [2022-01-18 15:15:23,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:23,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:15:23,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:23,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:15:23,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:15:23,502 INFO L87 Difference]: Start difference. First operand 755 states and 2502 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:23,739 INFO L93 Difference]: Finished difference Result 925 states and 2969 transitions. [2022-01-18 15:15:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:23,739 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:23,741 INFO L225 Difference]: With dead ends: 925 [2022-01-18 15:15:23,741 INFO L226 Difference]: Without dead ends: 860 [2022-01-18 15:15:23,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:23,741 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:23,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 155 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-01-18 15:15:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 751. [2022-01-18 15:15:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.3093333333333335) internal successors, (2482), 750 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2482 transitions. [2022-01-18 15:15:23,749 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2482 transitions. Word has length 21 [2022-01-18 15:15:23,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:23,749 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2482 transitions. [2022-01-18 15:15:23,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:23,749 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2482 transitions. [2022-01-18 15:15:23,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:23,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:23,750 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:23,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Ended with exit code 0 [2022-01-18 15:15:23,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2022-01-18 15:15:23,950 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:23,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:23,951 INFO L85 PathProgramCache]: Analyzing trace with hash 375252509, now seen corresponding path program 366 times [2022-01-18 15:15:23,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:23,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183259475] [2022-01-18 15:15:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:23,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:24,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:24,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183259475] [2022-01-18 15:15:24,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183259475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:24,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941837299] [2022-01-18 15:15:24,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:24,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:24,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:24,039 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:24,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-01-18 15:15:24,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:15:24,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:24,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:24,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:24,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:24,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:24,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:24,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:24,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:24,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:24,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:15:24,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:24,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:15:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:24,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941837299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:24,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:24,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:15:24,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294046945] [2022-01-18 15:15:24,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:24,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:24,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:24,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:24,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:24,400 INFO L87 Difference]: Start difference. First operand 751 states and 2482 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:24,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:24,662 INFO L93 Difference]: Finished difference Result 1031 states and 3258 transitions. [2022-01-18 15:15:24,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:24,662 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:24,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:24,664 INFO L225 Difference]: With dead ends: 1031 [2022-01-18 15:15:24,664 INFO L226 Difference]: Without dead ends: 989 [2022-01-18 15:15:24,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:15:24,664 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:24,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 154 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-01-18 15:15:24,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 734. [2022-01-18 15:15:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.3042291950886766) internal successors, (2422), 733 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2422 transitions. [2022-01-18 15:15:24,673 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2422 transitions. Word has length 21 [2022-01-18 15:15:24,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:24,673 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2422 transitions. [2022-01-18 15:15:24,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:24,673 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2422 transitions. [2022-01-18 15:15:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:24,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:24,674 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:24,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Ended with exit code 0 [2022-01-18 15:15:24,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2022-01-18 15:15:24,874 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:24,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1708616946, now seen corresponding path program 367 times [2022-01-18 15:15:24,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:24,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988196796] [2022-01-18 15:15:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:24,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:24,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:24,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988196796] [2022-01-18 15:15:24,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988196796] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:24,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832457984] [2022-01-18 15:15:24,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:24,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:24,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:24,980 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:24,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-01-18 15:15:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:25,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:25,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:25,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:25,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:25,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:25,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:25,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:25,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:25,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:25,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:25,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:25,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:25,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:15:25,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:25,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:25,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832457984] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:25,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:25,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:15:25,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853805195] [2022-01-18 15:15:25,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:25,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:25,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:25,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:25,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:25,672 INFO L87 Difference]: Start difference. First operand 734 states and 2422 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:25,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:25,976 INFO L93 Difference]: Finished difference Result 1049 states and 3371 transitions. [2022-01-18 15:15:25,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:15:25,976 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:25,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:25,978 INFO L225 Difference]: With dead ends: 1049 [2022-01-18 15:15:25,978 INFO L226 Difference]: Without dead ends: 1026 [2022-01-18 15:15:25,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:15:25,978 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 67 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:25,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 272 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 576 Invalid, 0 Unknown, 223 Unchecked, 0.2s Time] [2022-01-18 15:15:25,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-01-18 15:15:25,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 732. [2022-01-18 15:15:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.3064295485636115) internal successors, (2417), 731 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:25,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2417 transitions. [2022-01-18 15:15:25,987 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2417 transitions. Word has length 21 [2022-01-18 15:15:25,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:25,987 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2417 transitions. [2022-01-18 15:15:25,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:25,987 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2417 transitions. [2022-01-18 15:15:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:25,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:25,988 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:26,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Ended with exit code 0 [2022-01-18 15:15:26,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-01-18 15:15:26,188 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:26,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1326852719, now seen corresponding path program 368 times [2022-01-18 15:15:26,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:26,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899952429] [2022-01-18 15:15:26,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:26,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:26,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:26,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899952429] [2022-01-18 15:15:26,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899952429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:26,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112286505] [2022-01-18 15:15:26,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:26,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:26,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:26,310 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:26,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-01-18 15:15:26,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:26,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:26,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:26,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:26,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:26,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:26,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:26,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:26,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:15:26,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:26,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:15:26,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:26,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:15:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:26,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112286505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:26,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:26,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:15:26,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019369699] [2022-01-18 15:15:26,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:26,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:26,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:26,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:26,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:26,732 INFO L87 Difference]: Start difference. First operand 732 states and 2417 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:27,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:27,070 INFO L93 Difference]: Finished difference Result 1105 states and 3475 transitions. [2022-01-18 15:15:27,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:15:27,070 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:27,071 INFO L225 Difference]: With dead ends: 1105 [2022-01-18 15:15:27,071 INFO L226 Difference]: Without dead ends: 1063 [2022-01-18 15:15:27,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:15:27,072 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 127 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:27,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 220 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2022-01-18 15:15:27,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 730. [2022-01-18 15:15:27,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.3127572016460904) internal successors, (2415), 729 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:27,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2415 transitions. [2022-01-18 15:15:27,081 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2415 transitions. Word has length 21 [2022-01-18 15:15:27,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:27,081 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2415 transitions. [2022-01-18 15:15:27,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:27,081 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2415 transitions. [2022-01-18 15:15:27,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:27,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:27,082 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:27,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Ended with exit code 0 [2022-01-18 15:15:27,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:27,282 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:27,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:27,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1935838326, now seen corresponding path program 369 times [2022-01-18 15:15:27,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:27,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579426087] [2022-01-18 15:15:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:27,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:27,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:27,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579426087] [2022-01-18 15:15:27,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579426087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:27,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394030374] [2022-01-18 15:15:27,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:27,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:27,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:27,389 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:27,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-01-18 15:15:27,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:15:27,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:27,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:27,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:27,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:27,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:27,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:27,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:27,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:27,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:27,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:27,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:27,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:27,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:27,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:15:27,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:27,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:27,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394030374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:27,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:27,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:15:27,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775408844] [2022-01-18 15:15:27,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:27,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:27,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:27,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:27,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:27,910 INFO L87 Difference]: Start difference. First operand 730 states and 2415 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:28,094 INFO L93 Difference]: Finished difference Result 934 states and 3029 transitions. [2022-01-18 15:15:28,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:15:28,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:28,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:28,096 INFO L225 Difference]: With dead ends: 934 [2022-01-18 15:15:28,096 INFO L226 Difference]: Without dead ends: 911 [2022-01-18 15:15:28,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:15:28,096 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:28,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 193 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 237 Invalid, 0 Unknown, 138 Unchecked, 0.1s Time] [2022-01-18 15:15:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-01-18 15:15:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 728. [2022-01-18 15:15:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 3.3067400275103163) internal successors, (2404), 727 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2404 transitions. [2022-01-18 15:15:28,104 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2404 transitions. Word has length 21 [2022-01-18 15:15:28,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:28,104 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 2404 transitions. [2022-01-18 15:15:28,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:28,104 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2404 transitions. [2022-01-18 15:15:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:28,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:28,105 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:28,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Ended with exit code 0 [2022-01-18 15:15:28,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:28,306 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:28,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:28,306 INFO L85 PathProgramCache]: Analyzing trace with hash 288324350, now seen corresponding path program 370 times [2022-01-18 15:15:28,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:28,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063107630] [2022-01-18 15:15:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:28,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:28,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:28,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063107630] [2022-01-18 15:15:28,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063107630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:28,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719160037] [2022-01-18 15:15:28,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:28,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:28,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:28,411 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:28,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-01-18 15:15:28,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:28,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:28,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:28,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:28,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:28,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:28,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:28,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:28,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:15:28,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:28,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:15:28,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:28,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:28,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719160037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:28,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:28,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:15:28,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430334067] [2022-01-18 15:15:28,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:28,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:28,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:28,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:28,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:28,808 INFO L87 Difference]: Start difference. First operand 728 states and 2404 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:29,183 INFO L93 Difference]: Finished difference Result 1032 states and 3295 transitions. [2022-01-18 15:15:29,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:15:29,183 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:29,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:29,185 INFO L225 Difference]: With dead ends: 1032 [2022-01-18 15:15:29,185 INFO L226 Difference]: Without dead ends: 1013 [2022-01-18 15:15:29,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:15:29,185 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 55 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:29,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 248 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-01-18 15:15:29,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 728. [2022-01-18 15:15:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 3.3067400275103163) internal successors, (2404), 727 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2404 transitions. [2022-01-18 15:15:29,194 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2404 transitions. Word has length 21 [2022-01-18 15:15:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:29,194 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 2404 transitions. [2022-01-18 15:15:29,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:29,194 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2404 transitions. [2022-01-18 15:15:29,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:29,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:29,195 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:29,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Ended with exit code 0 [2022-01-18 15:15:29,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:29,395 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:29,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1510506498, now seen corresponding path program 371 times [2022-01-18 15:15:29,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:29,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527567496] [2022-01-18 15:15:29,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:29,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:29,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:29,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527567496] [2022-01-18 15:15:29,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527567496] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:29,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135504056] [2022-01-18 15:15:29,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:29,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:29,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:29,510 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:29,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-01-18 15:15:29,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:15:29,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:29,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:29,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:29,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:29,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:29,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:29,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:29,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:29,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:15:29,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:29,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:15:29,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:29,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:29,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135504056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:29,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:29,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:15:29,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270959293] [2022-01-18 15:15:29,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:29,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:29,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:29,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:29,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:29,929 INFO L87 Difference]: Start difference. First operand 728 states and 2404 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:30,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:30,310 INFO L93 Difference]: Finished difference Result 1135 states and 3584 transitions. [2022-01-18 15:15:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:15:30,310 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:30,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:30,312 INFO L225 Difference]: With dead ends: 1135 [2022-01-18 15:15:30,312 INFO L226 Difference]: Without dead ends: 1112 [2022-01-18 15:15:30,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:15:30,312 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 141 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:30,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 196 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2022-01-18 15:15:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 736. [2022-01-18 15:15:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.3142857142857145) internal successors, (2436), 735 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2436 transitions. [2022-01-18 15:15:30,322 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2436 transitions. Word has length 21 [2022-01-18 15:15:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:30,322 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2436 transitions. [2022-01-18 15:15:30,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2436 transitions. [2022-01-18 15:15:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:30,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:30,323 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:30,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Ended with exit code 0 [2022-01-18 15:15:30,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:30,525 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1340346851, now seen corresponding path program 372 times [2022-01-18 15:15:30,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:30,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672524748] [2022-01-18 15:15:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:30,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:30,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:30,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672524748] [2022-01-18 15:15:30,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672524748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:30,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339807742] [2022-01-18 15:15:30,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:30,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:30,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:30,623 INFO L229 MonitoredProcess]: Starting monitored process 373 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:30,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-01-18 15:15:30,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:15:30,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:30,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:30,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:30,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:30,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:30,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:30,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:30,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:30,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:15:31,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:31,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:15:31,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:31,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:31,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339807742] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:31,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:31,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:15:31,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814219203] [2022-01-18 15:15:31,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:31,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:31,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:31,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:31,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:31,033 INFO L87 Difference]: Start difference. First operand 736 states and 2436 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:31,342 INFO L93 Difference]: Finished difference Result 965 states and 3093 transitions. [2022-01-18 15:15:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:15:31,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:31,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:31,344 INFO L225 Difference]: With dead ends: 965 [2022-01-18 15:15:31,344 INFO L226 Difference]: Without dead ends: 944 [2022-01-18 15:15:31,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:15:31,345 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:31,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 198 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:31,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-01-18 15:15:31,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 734. [2022-01-18 15:15:31,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.3069577080491133) internal successors, (2424), 733 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2424 transitions. [2022-01-18 15:15:31,355 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2424 transitions. Word has length 21 [2022-01-18 15:15:31,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:31,356 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2424 transitions. [2022-01-18 15:15:31,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:31,356 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2424 transitions. [2022-01-18 15:15:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:31,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:31,357 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:31,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Ended with exit code 0 [2022-01-18 15:15:31,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:31,557 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:31,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:31,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1406996344, now seen corresponding path program 373 times [2022-01-18 15:15:31,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:31,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662050959] [2022-01-18 15:15:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:31,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:31,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:31,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662050959] [2022-01-18 15:15:31,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662050959] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:31,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097996475] [2022-01-18 15:15:31,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:31,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:31,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:31,694 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:31,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-01-18 15:15:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:31,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:31,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:31,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:31,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:31,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:31,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:31,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:31,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:15:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:31,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:32,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:32,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:15:32,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:32,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:15:32,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:32,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:32,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097996475] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:32,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:32,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:15:32,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986914984] [2022-01-18 15:15:32,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:32,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:15:32,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:32,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:15:32,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:32,159 INFO L87 Difference]: Start difference. First operand 734 states and 2424 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:32,411 INFO L93 Difference]: Finished difference Result 957 states and 3080 transitions. [2022-01-18 15:15:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:15:32,412 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:32,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:32,413 INFO L225 Difference]: With dead ends: 957 [2022-01-18 15:15:32,413 INFO L226 Difference]: Without dead ends: 938 [2022-01-18 15:15:32,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:15:32,414 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:32,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 212 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 522 Invalid, 0 Unknown, 248 Unchecked, 0.2s Time] [2022-01-18 15:15:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-01-18 15:15:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 736. [2022-01-18 15:15:32,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.3047619047619046) internal successors, (2429), 735 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2429 transitions. [2022-01-18 15:15:32,423 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2429 transitions. Word has length 21 [2022-01-18 15:15:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:32,423 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2429 transitions. [2022-01-18 15:15:32,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2429 transitions. [2022-01-18 15:15:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:32,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:32,424 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:32,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Ended with exit code 0 [2022-01-18 15:15:32,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2022-01-18 15:15:32,624 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:32,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1633038960, now seen corresponding path program 374 times [2022-01-18 15:15:32,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:32,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058571580] [2022-01-18 15:15:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:32,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:32,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:32,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058571580] [2022-01-18 15:15:32,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058571580] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:32,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573424508] [2022-01-18 15:15:32,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:32,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:32,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:32,756 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:32,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-01-18 15:15:32,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:32,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:32,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:32,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:32,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:32,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:32,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:33,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:33,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:15:33,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:33,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:15:33,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:33,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:33,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573424508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:33,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:33,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:15:33,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143069550] [2022-01-18 15:15:33,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:33,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:33,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:33,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:33,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:33,157 INFO L87 Difference]: Start difference. First operand 736 states and 2429 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:33,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:33,602 INFO L93 Difference]: Finished difference Result 1096 states and 3424 transitions. [2022-01-18 15:15:33,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:15:33,602 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:33,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:33,604 INFO L225 Difference]: With dead ends: 1096 [2022-01-18 15:15:33,604 INFO L226 Difference]: Without dead ends: 1077 [2022-01-18 15:15:33,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:15:33,604 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 87 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:33,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 271 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:33,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-01-18 15:15:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 725. [2022-01-18 15:15:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 3.296961325966851) internal successors, (2387), 724 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 2387 transitions. [2022-01-18 15:15:33,613 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 2387 transitions. Word has length 21 [2022-01-18 15:15:33,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:33,613 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 2387 transitions. [2022-01-18 15:15:33,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 2387 transitions. [2022-01-18 15:15:33,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:33,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:33,614 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:33,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Ended with exit code 0 [2022-01-18 15:15:33,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:33,815 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:33,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:33,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1778981021, now seen corresponding path program 375 times [2022-01-18 15:15:33,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:33,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309889443] [2022-01-18 15:15:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:33,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:33,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:33,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309889443] [2022-01-18 15:15:33,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309889443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:33,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983539692] [2022-01-18 15:15:33,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:33,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:33,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:33,929 INFO L229 MonitoredProcess]: Starting monitored process 376 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:33,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-01-18 15:15:33,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:15:33,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:33,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:33,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:34,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:34,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:34,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:34,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:34,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:15:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:34,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:34,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:34,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:34,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:34,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:34,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:34,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:34,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983539692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:34,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:34,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:15:34,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656734357] [2022-01-18 15:15:34,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:34,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:34,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:34,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:34,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:34,421 INFO L87 Difference]: Start difference. First operand 725 states and 2387 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:34,697 INFO L93 Difference]: Finished difference Result 1144 states and 3631 transitions. [2022-01-18 15:15:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:15:34,697 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:34,699 INFO L225 Difference]: With dead ends: 1144 [2022-01-18 15:15:34,699 INFO L226 Difference]: Without dead ends: 1084 [2022-01-18 15:15:34,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:15:34,699 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:34,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 216 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 532 Invalid, 0 Unknown, 124 Unchecked, 0.2s Time] [2022-01-18 15:15:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-01-18 15:15:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 727. [2022-01-18 15:15:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.2947658402203857) internal successors, (2392), 726 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2392 transitions. [2022-01-18 15:15:34,708 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2392 transitions. Word has length 21 [2022-01-18 15:15:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:34,708 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 2392 transitions. [2022-01-18 15:15:34,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:34,708 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2392 transitions. [2022-01-18 15:15:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:34,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:34,709 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:34,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Ended with exit code 0 [2022-01-18 15:15:34,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2022-01-18 15:15:34,910 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:34,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:34,910 INFO L85 PathProgramCache]: Analyzing trace with hash 903792893, now seen corresponding path program 376 times [2022-01-18 15:15:34,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:34,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868891291] [2022-01-18 15:15:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:34,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:35,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:35,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868891291] [2022-01-18 15:15:35,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868891291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:35,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213361024] [2022-01-18 15:15:35,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:35,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:35,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:35,029 INFO L229 MonitoredProcess]: Starting monitored process 377 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:35,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-01-18 15:15:35,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:35,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:35,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:35,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:35,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:35,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:35,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:35,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:35,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:35,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:35,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:35,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:35,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:35,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:35,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:35,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:35,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:35,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213361024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:35,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:35,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:15:35,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945474867] [2022-01-18 15:15:35,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:35,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:35,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:35,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:35,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:35,534 INFO L87 Difference]: Start difference. First operand 727 states and 2392 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:36,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:36,010 INFO L93 Difference]: Finished difference Result 1131 states and 3596 transitions. [2022-01-18 15:15:36,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:15:36,010 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:36,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:36,012 INFO L225 Difference]: With dead ends: 1131 [2022-01-18 15:15:36,012 INFO L226 Difference]: Without dead ends: 1104 [2022-01-18 15:15:36,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:15:36,012 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:36,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 299 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 848 Invalid, 0 Unknown, 167 Unchecked, 0.3s Time] [2022-01-18 15:15:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-01-18 15:15:36,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 729. [2022-01-18 15:15:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.2925824175824174) internal successors, (2397), 728 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2397 transitions. [2022-01-18 15:15:36,021 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2397 transitions. Word has length 21 [2022-01-18 15:15:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:36,021 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 2397 transitions. [2022-01-18 15:15:36,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2397 transitions. [2022-01-18 15:15:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:36,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:36,022 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:36,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Ended with exit code 0 [2022-01-18 15:15:36,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2022-01-18 15:15:36,222 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:36,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:36,223 INFO L85 PathProgramCache]: Analyzing trace with hash -94270307, now seen corresponding path program 377 times [2022-01-18 15:15:36,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:36,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187525460] [2022-01-18 15:15:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:36,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:36,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:36,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187525460] [2022-01-18 15:15:36,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187525460] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:36,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998617755] [2022-01-18 15:15:36,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:36,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:36,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:36,372 INFO L229 MonitoredProcess]: Starting monitored process 378 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:36,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-01-18 15:15:36,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:15:36,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:36,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:36,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:36,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:36,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:36,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:36,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:36,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:36,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:36,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:36,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:36,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:36,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:36,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:36,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998617755] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:36,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:36,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:15:36,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066792795] [2022-01-18 15:15:36,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:36,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:15:36,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:36,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:15:36,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:36,801 INFO L87 Difference]: Start difference. First operand 729 states and 2397 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:37,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:37,221 INFO L93 Difference]: Finished difference Result 1049 states and 3355 transitions. [2022-01-18 15:15:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:15:37,221 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:37,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:37,223 INFO L225 Difference]: With dead ends: 1049 [2022-01-18 15:15:37,223 INFO L226 Difference]: Without dead ends: 1028 [2022-01-18 15:15:37,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:15:37,223 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:37,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 239 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:37,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2022-01-18 15:15:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 725. [2022-01-18 15:15:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 3.296961325966851) internal successors, (2387), 724 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 2387 transitions. [2022-01-18 15:15:37,231 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 2387 transitions. Word has length 21 [2022-01-18 15:15:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:37,232 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 2387 transitions. [2022-01-18 15:15:37,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 2387 transitions. [2022-01-18 15:15:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:37,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:37,232 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:37,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Ended with exit code 0 [2022-01-18 15:15:37,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2022-01-18 15:15:37,433 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:37,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1630453877, now seen corresponding path program 378 times [2022-01-18 15:15:37,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:37,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97725240] [2022-01-18 15:15:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:37,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:37,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:37,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97725240] [2022-01-18 15:15:37,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97725240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:37,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255114233] [2022-01-18 15:15:37,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:37,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:37,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:37,544 INFO L229 MonitoredProcess]: Starting monitored process 379 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:37,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-01-18 15:15:37,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:15:37,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:37,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:37,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:37,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:37,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:37,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:37,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:37,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:15:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:37,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:37,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:37,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:37,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:37,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:37,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:37,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:37,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255114233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:37,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:37,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:15:37,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081101437] [2022-01-18 15:15:37,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:37,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:37,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:37,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:37,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:37,924 INFO L87 Difference]: Start difference. First operand 725 states and 2387 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:38,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:38,077 INFO L93 Difference]: Finished difference Result 832 states and 2684 transitions. [2022-01-18 15:15:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:15:38,077 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:38,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:38,078 INFO L225 Difference]: With dead ends: 832 [2022-01-18 15:15:38,078 INFO L226 Difference]: Without dead ends: 788 [2022-01-18 15:15:38,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:38,078 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:38,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 139 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 432 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-01-18 15:15:38,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-01-18 15:15:38,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 732. [2022-01-18 15:15:38,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.2995896032831737) internal successors, (2412), 731 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:38,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2412 transitions. [2022-01-18 15:15:38,086 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2412 transitions. Word has length 21 [2022-01-18 15:15:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:38,086 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2412 transitions. [2022-01-18 15:15:38,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2412 transitions. [2022-01-18 15:15:38,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:38,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:38,087 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:38,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Ended with exit code 0 [2022-01-18 15:15:38,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2022-01-18 15:15:38,287 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:38,288 INFO L85 PathProgramCache]: Analyzing trace with hash 632390677, now seen corresponding path program 379 times [2022-01-18 15:15:38,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:38,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423448294] [2022-01-18 15:15:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:38,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:38,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:38,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423448294] [2022-01-18 15:15:38,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423448294] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:38,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19457670] [2022-01-18 15:15:38,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:38,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:38,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:38,391 INFO L229 MonitoredProcess]: Starting monitored process 380 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:38,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-01-18 15:15:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:38,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:38,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:38,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:38,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:38,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:38,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:15:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:38,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:38,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:38,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:38,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:38,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:38,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:38,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:38,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19457670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:38,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:38,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:15:38,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775479352] [2022-01-18 15:15:38,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:38,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:38,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:38,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:38,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:38,773 INFO L87 Difference]: Start difference. First operand 732 states and 2412 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:38,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:38,972 INFO L93 Difference]: Finished difference Result 802 states and 2612 transitions. [2022-01-18 15:15:38,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:38,973 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:38,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:38,974 INFO L225 Difference]: With dead ends: 802 [2022-01-18 15:15:38,975 INFO L226 Difference]: Without dead ends: 780 [2022-01-18 15:15:38,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:38,975 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:38,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 128 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:15:38,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-01-18 15:15:38,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 730. [2022-01-18 15:15:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.3017832647462275) internal successors, (2407), 729 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2407 transitions. [2022-01-18 15:15:38,985 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2407 transitions. Word has length 21 [2022-01-18 15:15:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:38,985 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2407 transitions. [2022-01-18 15:15:38,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2407 transitions. [2022-01-18 15:15:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:38,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:38,986 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:39,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:39,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:39,187 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:39,187 INFO L85 PathProgramCache]: Analyzing trace with hash -443397067, now seen corresponding path program 380 times [2022-01-18 15:15:39,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:39,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378168353] [2022-01-18 15:15:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:39,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:39,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:39,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378168353] [2022-01-18 15:15:39,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378168353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:39,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946549319] [2022-01-18 15:15:39,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:39,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:39,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:39,289 INFO L229 MonitoredProcess]: Starting monitored process 381 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:39,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-01-18 15:15:39,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:39,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:39,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:39,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:39,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:39,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:39,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:39,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:39,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:15:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:39,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:39,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:39,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:39,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:39,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:39,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:39,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:39,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946549319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:39,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:39,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:15:39,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014341831] [2022-01-18 15:15:39,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:39,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:39,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:39,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:39,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:39,670 INFO L87 Difference]: Start difference. First operand 730 states and 2407 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:39,847 INFO L93 Difference]: Finished difference Result 827 states and 2660 transitions. [2022-01-18 15:15:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:15:39,847 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:39,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:39,849 INFO L225 Difference]: With dead ends: 827 [2022-01-18 15:15:39,849 INFO L226 Difference]: Without dead ends: 812 [2022-01-18 15:15:39,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:39,849 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:39,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 170 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 504 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 15:15:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-18 15:15:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 734. [2022-01-18 15:15:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.305593451568895) internal successors, (2423), 733 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2423 transitions. [2022-01-18 15:15:39,856 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2423 transitions. Word has length 21 [2022-01-18 15:15:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:39,857 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2423 transitions. [2022-01-18 15:15:39,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2423 transitions. [2022-01-18 15:15:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:39,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:39,857 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:39,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Ended with exit code 0 [2022-01-18 15:15:40,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2022-01-18 15:15:40,058 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:40,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:40,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1885514206, now seen corresponding path program 381 times [2022-01-18 15:15:40,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:40,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140784720] [2022-01-18 15:15:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:40,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:40,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:40,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140784720] [2022-01-18 15:15:40,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140784720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:40,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524850664] [2022-01-18 15:15:40,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:40,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:40,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:40,190 INFO L229 MonitoredProcess]: Starting monitored process 382 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:40,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-01-18 15:15:40,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:15:40,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:40,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:40,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:40,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:40,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:40,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:40,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:40,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:40,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:15:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:40,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:40,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:40,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:40,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:40,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:40,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:40,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:40,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524850664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:40,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:40,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:15:40,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757309236] [2022-01-18 15:15:40,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:40,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:15:40,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:40,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:15:40,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:40,892 INFO L87 Difference]: Start difference. First operand 734 states and 2423 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:41,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:41,328 INFO L93 Difference]: Finished difference Result 1089 states and 3479 transitions. [2022-01-18 15:15:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:15:41,328 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:41,330 INFO L225 Difference]: With dead ends: 1089 [2022-01-18 15:15:41,330 INFO L226 Difference]: Without dead ends: 1070 [2022-01-18 15:15:41,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:15:41,330 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:41,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 222 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 564 Invalid, 0 Unknown, 134 Unchecked, 0.2s Time] [2022-01-18 15:15:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-01-18 15:15:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 735. [2022-01-18 15:15:41,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.3079019073569484) internal successors, (2428), 734 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2428 transitions. [2022-01-18 15:15:41,339 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2428 transitions. Word has length 21 [2022-01-18 15:15:41,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:41,339 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2428 transitions. [2022-01-18 15:15:41,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:41,339 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2428 transitions. [2022-01-18 15:15:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:41,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:41,340 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:41,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Ended with exit code 0 [2022-01-18 15:15:41,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,382 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:41,541 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:41,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:41,541 INFO L85 PathProgramCache]: Analyzing trace with hash -888851367, now seen corresponding path program 382 times [2022-01-18 15:15:41,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:41,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573946570] [2022-01-18 15:15:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:41,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:41,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:41,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573946570] [2022-01-18 15:15:41,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573946570] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:41,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932574866] [2022-01-18 15:15:41,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:41,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:41,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:41,663 INFO L229 MonitoredProcess]: Starting monitored process 383 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:41,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-01-18 15:15:41,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:41,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:41,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:41,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:41,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:41,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:42,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:42,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:42,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:42,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:15:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:42,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:42,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:42,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:42,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:42,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:42,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:42,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:42,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932574866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:42,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:42,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:15:42,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620354034] [2022-01-18 15:15:42,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:42,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:42,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:42,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:42,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:42,289 INFO L87 Difference]: Start difference. First operand 735 states and 2428 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:42,754 INFO L93 Difference]: Finished difference Result 1228 states and 3860 transitions. [2022-01-18 15:15:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:15:42,754 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:42,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:42,756 INFO L225 Difference]: With dead ends: 1228 [2022-01-18 15:15:42,756 INFO L226 Difference]: Without dead ends: 1162 [2022-01-18 15:15:42,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:15:42,756 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 114 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:42,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 185 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 491 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-01-18 15:15:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-01-18 15:15:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 740. [2022-01-18 15:15:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.3031123139377536) internal successors, (2441), 739 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:42,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2441 transitions. [2022-01-18 15:15:42,766 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2441 transitions. Word has length 21 [2022-01-18 15:15:42,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:42,766 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2441 transitions. [2022-01-18 15:15:42,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2441 transitions. [2022-01-18 15:15:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:42,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:42,767 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:42,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Ended with exit code 0 [2022-01-18 15:15:42,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,383 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:42,967 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:42,968 INFO L85 PathProgramCache]: Analyzing trace with hash 887451006, now seen corresponding path program 383 times [2022-01-18 15:15:42,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:42,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34881456] [2022-01-18 15:15:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:42,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:43,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:43,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34881456] [2022-01-18 15:15:43,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34881456] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:43,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974488033] [2022-01-18 15:15:43,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:43,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:43,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:43,076 INFO L229 MonitoredProcess]: Starting monitored process 384 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:43,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-01-18 15:15:43,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:15:43,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:43,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:43,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:43,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:43,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:43,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:43,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:43,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:43,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:43,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:43,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:43,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:43,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:43,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:43,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:43,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:43,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974488033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:43,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:43,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:15:43,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33482873] [2022-01-18 15:15:43,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:43,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:43,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:43,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:43,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:43,710 INFO L87 Difference]: Start difference. First operand 740 states and 2441 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:44,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:44,072 INFO L93 Difference]: Finished difference Result 1173 states and 3731 transitions. [2022-01-18 15:15:44,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:15:44,072 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:44,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:44,074 INFO L225 Difference]: With dead ends: 1173 [2022-01-18 15:15:44,074 INFO L226 Difference]: Without dead ends: 1131 [2022-01-18 15:15:44,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:15:44,074 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 79 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:44,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 199 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 586 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-01-18 15:15:44,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-01-18 15:15:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 741. [2022-01-18 15:15:44,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.308108108108108) internal successors, (2448), 740 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2448 transitions. [2022-01-18 15:15:44,084 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2448 transitions. Word has length 21 [2022-01-18 15:15:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:44,084 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2448 transitions. [2022-01-18 15:15:44,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2448 transitions. [2022-01-18 15:15:44,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:44,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:44,085 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:44,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Ended with exit code 0 [2022-01-18 15:15:44,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,384 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:44,285 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:44,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:44,285 INFO L85 PathProgramCache]: Analyzing trace with hash 544301355, now seen corresponding path program 384 times [2022-01-18 15:15:44,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:44,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689410434] [2022-01-18 15:15:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:44,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:44,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:44,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689410434] [2022-01-18 15:15:44,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689410434] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:44,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131740155] [2022-01-18 15:15:44,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:44,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:44,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:44,394 INFO L229 MonitoredProcess]: Starting monitored process 385 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:44,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-01-18 15:15:44,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:15:44,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:44,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:44,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:44,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:44,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:44,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:44,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:15:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:44,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:44,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:44,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:44,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:44,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:44,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:44,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:45,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131740155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:45,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:45,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:15:45,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840406312] [2022-01-18 15:15:45,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:45,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:45,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:45,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:45,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:45,027 INFO L87 Difference]: Start difference. First operand 741 states and 2448 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:45,141 INFO L93 Difference]: Finished difference Result 856 states and 2765 transitions. [2022-01-18 15:15:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:15:45,142 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:45,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:45,143 INFO L225 Difference]: With dead ends: 856 [2022-01-18 15:15:45,143 INFO L226 Difference]: Without dead ends: 812 [2022-01-18 15:15:45,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:45,143 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:45,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 133 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 317 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2022-01-18 15:15:45,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-18 15:15:45,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 741. [2022-01-18 15:15:45,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.308108108108108) internal successors, (2448), 740 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2448 transitions. [2022-01-18 15:15:45,151 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2448 transitions. Word has length 21 [2022-01-18 15:15:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:45,151 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2448 transitions. [2022-01-18 15:15:45,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2448 transitions. [2022-01-18 15:15:45,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:45,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:45,152 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:45,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:45,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,385 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:45,354 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:45,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1110038878, now seen corresponding path program 385 times [2022-01-18 15:15:45,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:45,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142387892] [2022-01-18 15:15:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:45,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:45,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:45,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142387892] [2022-01-18 15:15:45,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142387892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:45,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864381332] [2022-01-18 15:15:45,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:45,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:45,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:45,489 INFO L229 MonitoredProcess]: Starting monitored process 386 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:45,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-01-18 15:15:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:45,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:45,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:45,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:45,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:45,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:45,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:15:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:45,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:45,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:45,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:46,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:46,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:46,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:46,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:46,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864381332] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:46,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:46,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:15:46,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819325391] [2022-01-18 15:15:46,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:46,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:15:46,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:46,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:15:46,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:46,104 INFO L87 Difference]: Start difference. First operand 741 states and 2448 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:46,543 INFO L93 Difference]: Finished difference Result 1063 states and 3395 transitions. [2022-01-18 15:15:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:15:46,543 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:46,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:46,544 INFO L225 Difference]: With dead ends: 1063 [2022-01-18 15:15:46,544 INFO L226 Difference]: Without dead ends: 1044 [2022-01-18 15:15:46,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:15:46,545 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:46,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 229 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 701 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2022-01-18 15:15:46,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-01-18 15:15:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 746. [2022-01-18 15:15:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.3100671140939597) internal successors, (2466), 745 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2466 transitions. [2022-01-18 15:15:46,553 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2466 transitions. Word has length 21 [2022-01-18 15:15:46,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:46,553 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2466 transitions. [2022-01-18 15:15:46,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2466 transitions. [2022-01-18 15:15:46,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:46,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:46,554 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:46,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Ended with exit code 0 [2022-01-18 15:15:46,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,386 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:46,755 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:46,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:46,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1137573474, now seen corresponding path program 386 times [2022-01-18 15:15:46,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:46,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703068928] [2022-01-18 15:15:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:46,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:46,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:46,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703068928] [2022-01-18 15:15:46,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703068928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:46,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577960165] [2022-01-18 15:15:46,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:46,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:46,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:46,897 INFO L229 MonitoredProcess]: Starting monitored process 387 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:46,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-01-18 15:15:46,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:46,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:46,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:46,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:46,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:46,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:47,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:47,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:47,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:47,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:15:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:47,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:47,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:47,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:47,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:47,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:47,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:47,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:47,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577960165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:47,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:47,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:15:47,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309788923] [2022-01-18 15:15:47,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:47,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:15:47,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:47,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:15:47,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:47,469 INFO L87 Difference]: Start difference. First operand 746 states and 2466 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:47,872 INFO L93 Difference]: Finished difference Result 1043 states and 3343 transitions. [2022-01-18 15:15:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:15:47,872 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:47,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:47,874 INFO L225 Difference]: With dead ends: 1043 [2022-01-18 15:15:47,874 INFO L226 Difference]: Without dead ends: 1024 [2022-01-18 15:15:47,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:15:47,874 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:47,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 207 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 584 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-01-18 15:15:47,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-01-18 15:15:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 743. [2022-01-18 15:15:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.3086253369272236) internal successors, (2455), 742 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2455 transitions. [2022-01-18 15:15:47,883 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2455 transitions. Word has length 21 [2022-01-18 15:15:47,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:47,883 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2455 transitions. [2022-01-18 15:15:47,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2455 transitions. [2022-01-18 15:15:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:47,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:47,884 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:47,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Ended with exit code 0 [2022-01-18 15:15:48,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,387 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:48,084 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash 550922007, now seen corresponding path program 387 times [2022-01-18 15:15:48,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:48,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015023206] [2022-01-18 15:15:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:48,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:48,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:48,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015023206] [2022-01-18 15:15:48,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015023206] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:48,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134636174] [2022-01-18 15:15:48,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:48,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:48,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:48,194 INFO L229 MonitoredProcess]: Starting monitored process 388 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:48,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-01-18 15:15:48,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:15:48,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:48,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:48,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:48,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:48,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:48,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:48,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:48,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:48,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:15:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:48,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:48,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:48,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:48,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:48,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:48,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:48,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:48,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134636174] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:48,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:48,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:15:48,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605051811] [2022-01-18 15:15:48,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:48,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:48,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:48,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:48,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:48,855 INFO L87 Difference]: Start difference. First operand 743 states and 2455 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:48,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:48,999 INFO L93 Difference]: Finished difference Result 842 states and 2729 transitions. [2022-01-18 15:15:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:15:48,999 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:48,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:49,000 INFO L225 Difference]: With dead ends: 842 [2022-01-18 15:15:49,000 INFO L226 Difference]: Without dead ends: 820 [2022-01-18 15:15:49,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:49,000 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:49,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 191 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 409 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-01-18 15:15:49,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-01-18 15:15:49,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 743. [2022-01-18 15:15:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.3086253369272236) internal successors, (2455), 742 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2455 transitions. [2022-01-18 15:15:49,008 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2455 transitions. Word has length 21 [2022-01-18 15:15:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:49,008 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2455 transitions. [2022-01-18 15:15:49,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:49,008 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2455 transitions. [2022-01-18 15:15:49,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:49,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:49,009 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:49,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:49,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2022-01-18 15:15:49,209 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:49,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:49,210 INFO L85 PathProgramCache]: Analyzing trace with hash -718399211, now seen corresponding path program 388 times [2022-01-18 15:15:49,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:49,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361196547] [2022-01-18 15:15:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:49,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:49,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:49,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361196547] [2022-01-18 15:15:49,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361196547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:49,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679967414] [2022-01-18 15:15:49,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:49,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:49,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:49,319 INFO L229 MonitoredProcess]: Starting monitored process 389 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:49,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-01-18 15:15:49,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:49,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:49,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:49,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:49,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:49,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:49,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:49,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:49,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:49,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:15:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:49,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:49,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:49,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:49,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:49,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:49,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:49,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:50,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679967414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:50,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:50,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:15:50,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994689861] [2022-01-18 15:15:50,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:50,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:15:50,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:50,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:15:50,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:50,022 INFO L87 Difference]: Start difference. First operand 743 states and 2455 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:50,151 INFO L93 Difference]: Finished difference Result 838 states and 2707 transitions. [2022-01-18 15:15:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:15:50,152 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:50,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:50,153 INFO L225 Difference]: With dead ends: 838 [2022-01-18 15:15:50,153 INFO L226 Difference]: Without dead ends: 828 [2022-01-18 15:15:50,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:15:50,153 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:50,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 131 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 350 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-01-18 15:15:50,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-01-18 15:15:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 743. [2022-01-18 15:15:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.3086253369272236) internal successors, (2455), 742 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2455 transitions. [2022-01-18 15:15:50,161 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2455 transitions. Word has length 21 [2022-01-18 15:15:50,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:50,161 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2455 transitions. [2022-01-18 15:15:50,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2455 transitions. [2022-01-18 15:15:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:50,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:50,162 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:50,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Ended with exit code 0 [2022-01-18 15:15:50,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2022-01-18 15:15:50,362 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:50,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:50,363 INFO L85 PathProgramCache]: Analyzing trace with hash 67654809, now seen corresponding path program 389 times [2022-01-18 15:15:50,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:50,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211428133] [2022-01-18 15:15:50,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:50,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:50,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:50,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211428133] [2022-01-18 15:15:50,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211428133] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:50,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965010375] [2022-01-18 15:15:50,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:50,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:50,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:50,521 INFO L229 MonitoredProcess]: Starting monitored process 390 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:50,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-01-18 15:15:50,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:15:50,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:50,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:50,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:50,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:50,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:50,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:50,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:50,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:15:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:50,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:50,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:50,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:50,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:50,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:50,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:50,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:51,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965010375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:51,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:51,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:15:51,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661486902] [2022-01-18 15:15:51,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:51,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:51,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:51,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:51,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:51,012 INFO L87 Difference]: Start difference. First operand 743 states and 2455 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:51,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:51,558 INFO L93 Difference]: Finished difference Result 1313 states and 4099 transitions. [2022-01-18 15:15:51,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:15:51,558 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:51,560 INFO L225 Difference]: With dead ends: 1313 [2022-01-18 15:15:51,560 INFO L226 Difference]: Without dead ends: 1241 [2022-01-18 15:15:51,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:15:51,561 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 92 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:51,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 309 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 748 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-01-18 15:15:51,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2022-01-18 15:15:51,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 748. [2022-01-18 15:15:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.317269076305221) internal successors, (2478), 747 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2478 transitions. [2022-01-18 15:15:51,571 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2478 transitions. Word has length 21 [2022-01-18 15:15:51,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:51,571 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 2478 transitions. [2022-01-18 15:15:51,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:51,571 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2478 transitions. [2022-01-18 15:15:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:51,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:51,572 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:51,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Forceful destruction successful, exit code 0 [2022-01-18 15:15:51,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2022-01-18 15:15:51,772 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:51,772 INFO L85 PathProgramCache]: Analyzing trace with hash -787901919, now seen corresponding path program 390 times [2022-01-18 15:15:51,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:51,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611061768] [2022-01-18 15:15:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:51,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:51,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:51,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611061768] [2022-01-18 15:15:51,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611061768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:51,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008518713] [2022-01-18 15:15:51,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:51,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:51,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:51,881 INFO L229 MonitoredProcess]: Starting monitored process 391 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:51,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-01-18 15:15:51,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:15:51,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:51,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:51,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:51,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:52,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:52,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:52,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:52,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:52,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:52,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:52,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:52,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:52,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:52,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:52,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:52,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008518713] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:52,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:52,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:15:52,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840813325] [2022-01-18 15:15:52,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:52,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:52,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:52,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:52,317 INFO L87 Difference]: Start difference. First operand 748 states and 2478 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:52,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:52,471 INFO L93 Difference]: Finished difference Result 929 states and 2978 transitions. [2022-01-18 15:15:52,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:15:52,472 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:52,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:52,473 INFO L225 Difference]: With dead ends: 929 [2022-01-18 15:15:52,473 INFO L226 Difference]: Without dead ends: 871 [2022-01-18 15:15:52,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:52,473 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:52,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 198 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 419 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2022-01-18 15:15:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-01-18 15:15:52,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 742. [2022-01-18 15:15:52,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.3184885290148447) internal successors, (2459), 741 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2459 transitions. [2022-01-18 15:15:52,482 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2459 transitions. Word has length 21 [2022-01-18 15:15:52,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:52,482 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2459 transitions. [2022-01-18 15:15:52,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:52,482 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2459 transitions. [2022-01-18 15:15:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:52,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:52,483 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:52,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Ended with exit code 0 [2022-01-18 15:15:52,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2022-01-18 15:15:52,683 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:52,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:52,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1114672386, now seen corresponding path program 391 times [2022-01-18 15:15:52,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:52,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623070130] [2022-01-18 15:15:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:52,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:52,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:52,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623070130] [2022-01-18 15:15:52,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623070130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:52,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252190502] [2022-01-18 15:15:52,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:15:52,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:52,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:52,793 INFO L229 MonitoredProcess]: Starting monitored process 392 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:52,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-01-18 15:15:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:52,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:52,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:52,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:52,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:52,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:52,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:52,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:52,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:53,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:53,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:53,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:53,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:53,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:53,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:53,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:53,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252190502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:53,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:53,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:15:53,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977115439] [2022-01-18 15:15:53,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:53,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:53,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:53,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:53,308 INFO L87 Difference]: Start difference. First operand 742 states and 2459 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:53,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:53,756 INFO L93 Difference]: Finished difference Result 1129 states and 3621 transitions. [2022-01-18 15:15:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:15:53,756 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:53,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:53,758 INFO L225 Difference]: With dead ends: 1129 [2022-01-18 15:15:53,758 INFO L226 Difference]: Without dead ends: 1106 [2022-01-18 15:15:53,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:15:53,758 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:53,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 217 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 702 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-01-18 15:15:53,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-01-18 15:15:53,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 742. [2022-01-18 15:15:53,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.3184885290148447) internal successors, (2459), 741 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:53,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2459 transitions. [2022-01-18 15:15:53,767 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2459 transitions. Word has length 21 [2022-01-18 15:15:53,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:53,767 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2459 transitions. [2022-01-18 15:15:53,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:53,768 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2459 transitions. [2022-01-18 15:15:53,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:53,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:53,768 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:53,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Ended with exit code 0 [2022-01-18 15:15:53,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,392 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:53,969 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:53,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:53,969 INFO L85 PathProgramCache]: Analyzing trace with hash -329441561, now seen corresponding path program 392 times [2022-01-18 15:15:53,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:53,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431373614] [2022-01-18 15:15:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:53,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:54,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:54,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431373614] [2022-01-18 15:15:54,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431373614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:54,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606110250] [2022-01-18 15:15:54,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:15:54,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:54,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:54,109 INFO L229 MonitoredProcess]: Starting monitored process 393 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:54,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-01-18 15:15:54,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:54,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:54,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:54,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:54,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:54,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:54,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:54,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:54,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:15:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:54,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:54,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:54,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:54,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:54,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:54,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:54,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:54,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606110250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:54,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:54,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:15:54,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737236773] [2022-01-18 15:15:54,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:54,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:15:54,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:54,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:15:54,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:54,570 INFO L87 Difference]: Start difference. First operand 742 states and 2459 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:55,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:55,136 INFO L93 Difference]: Finished difference Result 1220 states and 3847 transitions. [2022-01-18 15:15:55,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:15:55,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:55,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:55,138 INFO L225 Difference]: With dead ends: 1220 [2022-01-18 15:15:55,138 INFO L226 Difference]: Without dead ends: 1199 [2022-01-18 15:15:55,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:15:55,139 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 104 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:55,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 236 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 484 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2022-01-18 15:15:55,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-01-18 15:15:55,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 740. [2022-01-18 15:15:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.311231393775372) internal successors, (2447), 739 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2447 transitions. [2022-01-18 15:15:55,148 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2447 transitions. Word has length 21 [2022-01-18 15:15:55,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:55,148 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2447 transitions. [2022-01-18 15:15:55,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:55,149 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2447 transitions. [2022-01-18 15:15:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:55,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:55,149 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:55,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Ended with exit code 0 [2022-01-18 15:15:55,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2022-01-18 15:15:55,350 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:55,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:55,350 INFO L85 PathProgramCache]: Analyzing trace with hash -642278919, now seen corresponding path program 393 times [2022-01-18 15:15:55,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:55,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618540202] [2022-01-18 15:15:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:55,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:55,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:55,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618540202] [2022-01-18 15:15:55,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618540202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:55,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339061274] [2022-01-18 15:15:55,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:15:55,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:55,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:55,482 INFO L229 MonitoredProcess]: Starting monitored process 394 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:55,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-01-18 15:15:55,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:15:55,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:55,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:55,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:55,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:55,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:55,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:15:55,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:55,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:15:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:55,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:55,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:55,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:55,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:55,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:55,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:55,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:55,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339061274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:55,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:55,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:15:55,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012580802] [2022-01-18 15:15:55,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:55,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:15:55,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:55,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:15:55,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:15:55,940 INFO L87 Difference]: Start difference. First operand 740 states and 2447 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:56,468 INFO L93 Difference]: Finished difference Result 1222 states and 3864 transitions. [2022-01-18 15:15:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:15:56,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:56,471 INFO L225 Difference]: With dead ends: 1222 [2022-01-18 15:15:56,471 INFO L226 Difference]: Without dead ends: 1195 [2022-01-18 15:15:56,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:15:56,471 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 85 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:56,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 264 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-01-18 15:15:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 745. [2022-01-18 15:15:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.3118279569892475) internal successors, (2464), 744 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2464 transitions. [2022-01-18 15:15:56,481 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2464 transitions. Word has length 21 [2022-01-18 15:15:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:56,481 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2464 transitions. [2022-01-18 15:15:56,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2464 transitions. [2022-01-18 15:15:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:56,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:56,482 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:56,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Ended with exit code 0 [2022-01-18 15:15:56,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2022-01-18 15:15:56,682 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:56,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1640342119, now seen corresponding path program 394 times [2022-01-18 15:15:56,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:56,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057114438] [2022-01-18 15:15:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:56,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:56,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:56,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057114438] [2022-01-18 15:15:56,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057114438] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:56,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875503510] [2022-01-18 15:15:56,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:15:56,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:56,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:56,806 INFO L229 MonitoredProcess]: Starting monitored process 395 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:56,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2022-01-18 15:15:56,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:15:56,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:56,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:56,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:56,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:56,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:57,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:57,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:57,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:57,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:15:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:57,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:57,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:57,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:57,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:57,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:57,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:57,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:57,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875503510] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:57,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:57,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:15:57,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121729272] [2022-01-18 15:15:57,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:57,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:15:57,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:57,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:15:57,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:57,333 INFO L87 Difference]: Start difference. First operand 745 states and 2464 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:57,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:57,756 INFO L93 Difference]: Finished difference Result 1110 states and 3544 transitions. [2022-01-18 15:15:57,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:15:57,756 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:57,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:57,758 INFO L225 Difference]: With dead ends: 1110 [2022-01-18 15:15:57,758 INFO L226 Difference]: Without dead ends: 1089 [2022-01-18 15:15:57,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:15:57,758 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 87 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:57,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 166 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 507 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-01-18 15:15:57,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-01-18 15:15:57,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 747. [2022-01-18 15:15:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.312332439678284) internal successors, (2471), 746 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:57,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2471 transitions. [2022-01-18 15:15:57,767 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2471 transitions. Word has length 21 [2022-01-18 15:15:57,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:57,767 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 2471 transitions. [2022-01-18 15:15:57,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2471 transitions. [2022-01-18 15:15:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:57,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:57,768 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:57,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Ended with exit code 0 [2022-01-18 15:15:57,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,395 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:57,969 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:57,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:57,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1877740921, now seen corresponding path program 395 times [2022-01-18 15:15:57,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:57,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559525406] [2022-01-18 15:15:57,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:57,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:58,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559525406] [2022-01-18 15:15:58,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559525406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728208194] [2022-01-18 15:15:58,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:15:58,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:58,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:58,098 INFO L229 MonitoredProcess]: Starting monitored process 396 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:58,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process [2022-01-18 15:15:58,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:15:58,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:58,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:58,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:58,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:58,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:58,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:58,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:58,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:58,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:58,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:15:58,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:58,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:58,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:58,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:58,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728208194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:58,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:58,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:15:58,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582583194] [2022-01-18 15:15:58,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:58,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:15:58,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:58,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:15:58,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:15:58,564 INFO L87 Difference]: Start difference. First operand 747 states and 2471 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:59,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:59,079 INFO L93 Difference]: Finished difference Result 1121 states and 3573 transitions. [2022-01-18 15:15:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:15:59,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:59,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:59,081 INFO L225 Difference]: With dead ends: 1121 [2022-01-18 15:15:59,081 INFO L226 Difference]: Without dead ends: 1100 [2022-01-18 15:15:59,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:15:59,081 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 86 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:59,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 237 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:15:59,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-01-18 15:15:59,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 741. [2022-01-18 15:15:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.3135135135135134) internal successors, (2452), 740 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2452 transitions. [2022-01-18 15:15:59,090 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2452 transitions. Word has length 21 [2022-01-18 15:15:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:59,090 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2452 transitions. [2022-01-18 15:15:59,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:59,090 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2452 transitions. [2022-01-18 15:15:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:59,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:59,091 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:59,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Ended with exit code 0 [2022-01-18 15:15:59,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,396 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:59,292 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:15:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:15:59,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1708234529, now seen corresponding path program 396 times [2022-01-18 15:15:59,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:15:59,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038094828] [2022-01-18 15:15:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:15:59,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:15:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:15:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:59,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:15:59,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038094828] [2022-01-18 15:15:59,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038094828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:15:59,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233574025] [2022-01-18 15:15:59,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:15:59,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:15:59,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:15:59,398 INFO L229 MonitoredProcess]: Starting monitored process 397 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:15:59,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Waiting until timeout for monitored process [2022-01-18 15:15:59,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:15:59,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:15:59,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:15:59,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:15:59,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:59,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:59,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:15:59,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:15:59,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:15:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:59,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:15:59,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:59,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:15:59,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:59,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:15:59,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:15:59,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:15:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:15:59,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233574025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:15:59,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:15:59,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:15:59,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106935813] [2022-01-18 15:15:59,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:15:59,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:15:59,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:15:59,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:15:59,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:59,744 INFO L87 Difference]: Start difference. First operand 741 states and 2452 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:59,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:15:59,880 INFO L93 Difference]: Finished difference Result 851 states and 2770 transitions. [2022-01-18 15:15:59,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:15:59,880 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:15:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:15:59,881 INFO L225 Difference]: With dead ends: 851 [2022-01-18 15:15:59,881 INFO L226 Difference]: Without dead ends: 829 [2022-01-18 15:15:59,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:15:59,882 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:15:59,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 109 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:15:59,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-18 15:15:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 741. [2022-01-18 15:15:59,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.3135135135135134) internal successors, (2452), 740 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:59,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2452 transitions. [2022-01-18 15:15:59,889 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2452 transitions. Word has length 21 [2022-01-18 15:15:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:15:59,890 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2452 transitions. [2022-01-18 15:15:59,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:15:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2452 transitions. [2022-01-18 15:15:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:15:59,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:15:59,891 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:15:59,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Ended with exit code 0 [2022-01-18 15:16:00,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2022-01-18 15:16:00,091 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:00,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:00,091 INFO L85 PathProgramCache]: Analyzing trace with hash 53894296, now seen corresponding path program 397 times [2022-01-18 15:16:00,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:00,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649477942] [2022-01-18 15:16:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:00,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:00,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:00,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649477942] [2022-01-18 15:16:00,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649477942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:00,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081041145] [2022-01-18 15:16:00,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:00,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:00,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:00,225 INFO L229 MonitoredProcess]: Starting monitored process 398 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:00,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Waiting until timeout for monitored process [2022-01-18 15:16:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:00,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:00,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:00,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:00,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:00,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:00,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:00,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:00,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:00,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:00,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:00,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:00,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:00,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:00,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:00,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081041145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:00,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:00,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:00,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676944928] [2022-01-18 15:16:00,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:00,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:00,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:00,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:00,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:00,666 INFO L87 Difference]: Start difference. First operand 741 states and 2452 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:01,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:01,147 INFO L93 Difference]: Finished difference Result 1126 states and 3601 transitions. [2022-01-18 15:16:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:16:01,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:01,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:01,149 INFO L225 Difference]: With dead ends: 1126 [2022-01-18 15:16:01,149 INFO L226 Difference]: Without dead ends: 1103 [2022-01-18 15:16:01,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:16:01,149 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 85 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:01,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 263 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:16:01,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-01-18 15:16:01,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 741. [2022-01-18 15:16:01,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.3135135135135134) internal successors, (2452), 740 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2452 transitions. [2022-01-18 15:16:01,158 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2452 transitions. Word has length 21 [2022-01-18 15:16:01,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:01,159 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2452 transitions. [2022-01-18 15:16:01,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2452 transitions. [2022-01-18 15:16:01,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:01,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:01,159 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:01,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Ended with exit code 0 [2022-01-18 15:16:01,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,398 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:01,360 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:01,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:01,360 INFO L85 PathProgramCache]: Analyzing trace with hash 657135293, now seen corresponding path program 398 times [2022-01-18 15:16:01,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:01,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382466749] [2022-01-18 15:16:01,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:01,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:01,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:01,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382466749] [2022-01-18 15:16:01,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382466749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:01,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860950951] [2022-01-18 15:16:01,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:01,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:01,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:01,463 INFO L229 MonitoredProcess]: Starting monitored process 399 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:01,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Waiting until timeout for monitored process [2022-01-18 15:16:01,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:01,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:01,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:01,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:01,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:01,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:01,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:01,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:01,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:01,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:01,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:01,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:01,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:16:01,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:01,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:01,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:01,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:01,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860950951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:01,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:01,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:01,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633413925] [2022-01-18 15:16:01,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:01,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:01,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:01,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:01,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:01,931 INFO L87 Difference]: Start difference. First operand 741 states and 2452 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:02,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:02,352 INFO L93 Difference]: Finished difference Result 1110 states and 3559 transitions. [2022-01-18 15:16:02,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:16:02,352 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:02,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:02,354 INFO L225 Difference]: With dead ends: 1110 [2022-01-18 15:16:02,354 INFO L226 Difference]: Without dead ends: 1083 [2022-01-18 15:16:02,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:16:02,354 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:02,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 202 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 613 Invalid, 0 Unknown, 173 Unchecked, 0.2s Time] [2022-01-18 15:16:02,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-01-18 15:16:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 742. [2022-01-18 15:16:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.3171390013495277) internal successors, (2458), 741 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2458 transitions. [2022-01-18 15:16:02,363 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2458 transitions. Word has length 21 [2022-01-18 15:16:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:02,364 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2458 transitions. [2022-01-18 15:16:02,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2458 transitions. [2022-01-18 15:16:02,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:02,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:02,365 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:02,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Ended with exit code 0 [2022-01-18 15:16:02,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,399 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:02,565 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:02,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1811744683, now seen corresponding path program 399 times [2022-01-18 15:16:02,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:02,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822420886] [2022-01-18 15:16:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:02,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:02,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822420886] [2022-01-18 15:16:02,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822420886] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893343243] [2022-01-18 15:16:02,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:02,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:02,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:02,674 INFO L229 MonitoredProcess]: Starting monitored process 400 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:02,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Waiting until timeout for monitored process [2022-01-18 15:16:02,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:16:02,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:02,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:02,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:02,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:02,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:02,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:02,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:02,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:02,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:02,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:02,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:02,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:02,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:02,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:02,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:03,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893343243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:03,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:03,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:16:03,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648347939] [2022-01-18 15:16:03,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:03,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:03,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:03,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:03,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:03,032 INFO L87 Difference]: Start difference. First operand 742 states and 2458 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:03,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:03,226 INFO L93 Difference]: Finished difference Result 866 states and 2814 transitions. [2022-01-18 15:16:03,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:03,227 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:03,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:03,228 INFO L225 Difference]: With dead ends: 866 [2022-01-18 15:16:03,228 INFO L226 Difference]: Without dead ends: 837 [2022-01-18 15:16:03,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:03,228 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:03,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 162 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:03,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-01-18 15:16:03,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 739. [2022-01-18 15:16:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.3157181571815717) internal successors, (2447), 738 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2447 transitions. [2022-01-18 15:16:03,236 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2447 transitions. Word has length 21 [2022-01-18 15:16:03,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:03,236 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2447 transitions. [2022-01-18 15:16:03,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:03,236 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2447 transitions. [2022-01-18 15:16:03,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:03,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:03,237 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:03,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Ended with exit code 0 [2022-01-18 15:16:03,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2022-01-18 15:16:03,437 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:03,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:03,438 INFO L85 PathProgramCache]: Analyzing trace with hash -817014823, now seen corresponding path program 400 times [2022-01-18 15:16:03,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:03,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304886880] [2022-01-18 15:16:03,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:03,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:03,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304886880] [2022-01-18 15:16:03,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304886880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057319574] [2022-01-18 15:16:03,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:03,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:03,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:03,550 INFO L229 MonitoredProcess]: Starting monitored process 401 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:03,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Waiting until timeout for monitored process [2022-01-18 15:16:03,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:03,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:03,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:03,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:03,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:03,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:03,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:03,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:03,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:03,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:16:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:03,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:03,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:03,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:16:03,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:03,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:03,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:03,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:03,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057319574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:03,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:03,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:16:03,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079633187] [2022-01-18 15:16:03,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:03,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:03,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:03,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:03,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:03,998 INFO L87 Difference]: Start difference. First operand 739 states and 2447 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:04,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:04,288 INFO L93 Difference]: Finished difference Result 1018 states and 3292 transitions. [2022-01-18 15:16:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:16:04,288 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:04,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:04,289 INFO L225 Difference]: With dead ends: 1018 [2022-01-18 15:16:04,289 INFO L226 Difference]: Without dead ends: 997 [2022-01-18 15:16:04,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:16:04,290 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:04,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 165 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 468 Invalid, 0 Unknown, 174 Unchecked, 0.2s Time] [2022-01-18 15:16:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-01-18 15:16:04,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 737. [2022-01-18 15:16:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.311141304347826) internal successors, (2437), 736 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2437 transitions. [2022-01-18 15:16:04,298 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2437 transitions. Word has length 21 [2022-01-18 15:16:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:04,298 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2437 transitions. [2022-01-18 15:16:04,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2437 transitions. [2022-01-18 15:16:04,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:04,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:04,299 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:04,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:04,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2022-01-18 15:16:04,500 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:04,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:04,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1826976089, now seen corresponding path program 401 times [2022-01-18 15:16:04,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:04,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703795790] [2022-01-18 15:16:04,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:04,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:04,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:04,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703795790] [2022-01-18 15:16:04,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703795790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:04,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234812816] [2022-01-18 15:16:04,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:04,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:04,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:04,597 INFO L229 MonitoredProcess]: Starting monitored process 402 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:04,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Waiting until timeout for monitored process [2022-01-18 15:16:04,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:16:04,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:04,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:04,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:04,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:04,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:04,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:04,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:04,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:04,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:04,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:05,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:05,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:05,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:05,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:05,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:05,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:05,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234812816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:05,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:05,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:05,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47634207] [2022-01-18 15:16:05,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:05,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:05,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:05,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:05,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:05,187 INFO L87 Difference]: Start difference. First operand 737 states and 2437 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:05,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:05,456 INFO L93 Difference]: Finished difference Result 1018 states and 3258 transitions. [2022-01-18 15:16:05,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:16:05,456 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:05,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:05,458 INFO L225 Difference]: With dead ends: 1018 [2022-01-18 15:16:05,458 INFO L226 Difference]: Without dead ends: 958 [2022-01-18 15:16:05,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:05,458 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:05,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 200 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 584 Invalid, 0 Unknown, 240 Unchecked, 0.2s Time] [2022-01-18 15:16:05,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-01-18 15:16:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 737. [2022-01-18 15:16:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.308423913043478) internal successors, (2435), 736 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2435 transitions. [2022-01-18 15:16:05,467 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2435 transitions. Word has length 21 [2022-01-18 15:16:05,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:05,467 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2435 transitions. [2022-01-18 15:16:05,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2435 transitions. [2022-01-18 15:16:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:05,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:05,468 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:05,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Ended with exit code 0 [2022-01-18 15:16:05,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,402 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:05,668 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:05,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:05,668 INFO L85 PathProgramCache]: Analyzing trace with hash -50673716, now seen corresponding path program 402 times [2022-01-18 15:16:05,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:05,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869798542] [2022-01-18 15:16:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:05,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:05,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:05,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869798542] [2022-01-18 15:16:05,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869798542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:05,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857629334] [2022-01-18 15:16:05,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:05,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:05,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:05,794 INFO L229 MonitoredProcess]: Starting monitored process 403 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:05,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Waiting until timeout for monitored process [2022-01-18 15:16:05,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:16:05,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:05,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:05,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:05,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:06,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:06,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:06,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:06,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:06,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:06,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:06,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:06,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:06,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:06,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:06,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:06,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857629334] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:06,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:06,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:06,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936301782] [2022-01-18 15:16:06,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:06,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:06,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:06,306 INFO L87 Difference]: Start difference. First operand 737 states and 2435 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:06,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:06,641 INFO L93 Difference]: Finished difference Result 1060 states and 3404 transitions. [2022-01-18 15:16:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:16:06,641 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:06,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:06,643 INFO L225 Difference]: With dead ends: 1060 [2022-01-18 15:16:06,643 INFO L226 Difference]: Without dead ends: 1037 [2022-01-18 15:16:06,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:06,643 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:06,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 266 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 768 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-01-18 15:16:06,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-01-18 15:16:06,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 735. [2022-01-18 15:16:06,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.310626702997275) internal successors, (2430), 734 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:06,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2430 transitions. [2022-01-18 15:16:06,652 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2430 transitions. Word has length 21 [2022-01-18 15:16:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:06,652 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2430 transitions. [2022-01-18 15:16:06,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2430 transitions. [2022-01-18 15:16:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:06,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:06,653 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:06,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Ended with exit code 0 [2022-01-18 15:16:06,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2022-01-18 15:16:06,853 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:06,853 INFO L85 PathProgramCache]: Analyzing trace with hash -393823367, now seen corresponding path program 403 times [2022-01-18 15:16:06,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:06,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134750461] [2022-01-18 15:16:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:06,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:06,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:06,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134750461] [2022-01-18 15:16:06,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134750461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:06,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912899804] [2022-01-18 15:16:06,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:06,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:06,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:06,959 INFO L229 MonitoredProcess]: Starting monitored process 404 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:06,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Waiting until timeout for monitored process [2022-01-18 15:16:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:06,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:06,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:07,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:07,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:07,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:07,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:07,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:07,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:16:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:07,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:07,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:07,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:16:07,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:07,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:07,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:07,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:07,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912899804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:07,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:07,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:16:07,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218551113] [2022-01-18 15:16:07,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:07,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:07,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:07,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:07,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:07,492 INFO L87 Difference]: Start difference. First operand 735 states and 2430 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:07,658 INFO L93 Difference]: Finished difference Result 846 states and 2737 transitions. [2022-01-18 15:16:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:07,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:07,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:07,660 INFO L225 Difference]: With dead ends: 846 [2022-01-18 15:16:07,660 INFO L226 Difference]: Without dead ends: 802 [2022-01-18 15:16:07,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:07,660 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:07,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 164 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 471 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-01-18 15:16:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-01-18 15:16:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 735. [2022-01-18 15:16:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.310626702997275) internal successors, (2430), 734 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2430 transitions. [2022-01-18 15:16:07,668 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2430 transitions. Word has length 21 [2022-01-18 15:16:07,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:07,668 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2430 transitions. [2022-01-18 15:16:07,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2430 transitions. [2022-01-18 15:16:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:07,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:07,669 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:07,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Ended with exit code 0 [2022-01-18 15:16:07,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2022-01-18 15:16:07,869 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:07,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:07,869 INFO L85 PathProgramCache]: Analyzing trace with hash 975986475, now seen corresponding path program 404 times [2022-01-18 15:16:07,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:07,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642591593] [2022-01-18 15:16:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:07,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:07,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:07,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:07,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642591593] [2022-01-18 15:16:07,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642591593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:07,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356274417] [2022-01-18 15:16:07,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:07,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:07,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:07,988 INFO L229 MonitoredProcess]: Starting monitored process 405 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:07,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Waiting until timeout for monitored process [2022-01-18 15:16:08,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:08,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:08,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:08,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:08,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:08,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:08,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:08,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:08,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:08,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:08,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:08,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:08,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:08,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:16:08,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:08,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:08,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356274417] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:08,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:08,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:08,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040686346] [2022-01-18 15:16:08,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:08,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:08,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:08,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:08,557 INFO L87 Difference]: Start difference. First operand 735 states and 2430 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:08,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:08,950 INFO L93 Difference]: Finished difference Result 1071 states and 3429 transitions. [2022-01-18 15:16:08,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:16:08,951 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:08,952 INFO L225 Difference]: With dead ends: 1071 [2022-01-18 15:16:08,952 INFO L226 Difference]: Without dead ends: 1038 [2022-01-18 15:16:08,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:08,952 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:08,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 298 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 801 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-01-18 15:16:08,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-01-18 15:16:08,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 741. [2022-01-18 15:16:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.3054054054054056) internal successors, (2446), 740 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2446 transitions. [2022-01-18 15:16:08,961 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2446 transitions. Word has length 21 [2022-01-18 15:16:08,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:08,961 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2446 transitions. [2022-01-18 15:16:08,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:08,961 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2446 transitions. [2022-01-18 15:16:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:08,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:08,962 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:08,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Ended with exit code 0 [2022-01-18 15:16:09,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2022-01-18 15:16:09,163 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:09,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:09,163 INFO L85 PathProgramCache]: Analyzing trace with hash -387202715, now seen corresponding path program 405 times [2022-01-18 15:16:09,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:09,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910206715] [2022-01-18 15:16:09,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:09,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:09,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:09,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910206715] [2022-01-18 15:16:09,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910206715] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:09,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609513901] [2022-01-18 15:16:09,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:09,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:09,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:09,305 INFO L229 MonitoredProcess]: Starting monitored process 406 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:09,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Waiting until timeout for monitored process [2022-01-18 15:16:09,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:16:09,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:09,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:09,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:09,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:09,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:09,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:09,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:09,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:16:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:09,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:09,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:09,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:16:09,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:09,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:09,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:09,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:09,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609513901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:09,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:09,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:16:09,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451711682] [2022-01-18 15:16:09,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:09,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:09,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:09,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:09,757 INFO L87 Difference]: Start difference. First operand 741 states and 2446 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:09,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:09,914 INFO L93 Difference]: Finished difference Result 840 states and 2721 transitions. [2022-01-18 15:16:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:16:09,915 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:09,916 INFO L225 Difference]: With dead ends: 840 [2022-01-18 15:16:09,916 INFO L226 Difference]: Without dead ends: 818 [2022-01-18 15:16:09,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:09,916 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:09,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 195 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 443 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-01-18 15:16:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-01-18 15:16:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 741. [2022-01-18 15:16:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.3054054054054056) internal successors, (2446), 740 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2446 transitions. [2022-01-18 15:16:09,924 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2446 transitions. Word has length 21 [2022-01-18 15:16:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:09,924 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2446 transitions. [2022-01-18 15:16:09,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2446 transitions. [2022-01-18 15:16:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:09,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:09,925 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:09,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:10,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2022-01-18 15:16:10,125 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:10,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:10,126 INFO L85 PathProgramCache]: Analyzing trace with hash -904069141, now seen corresponding path program 406 times [2022-01-18 15:16:10,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:10,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908176565] [2022-01-18 15:16:10,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:10,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:10,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:10,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908176565] [2022-01-18 15:16:10,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908176565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:10,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402598760] [2022-01-18 15:16:10,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:10,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:10,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:10,244 INFO L229 MonitoredProcess]: Starting monitored process 407 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:10,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Waiting until timeout for monitored process [2022-01-18 15:16:10,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:10,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:10,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:10,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:10,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:10,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:10,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:10,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:10,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:10,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:10,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:10,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:10,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:16:10,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:10,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:10,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402598760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:10,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:10,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:10,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156802091] [2022-01-18 15:16:10,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:10,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:10,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:10,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:10,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:10,753 INFO L87 Difference]: Start difference. First operand 741 states and 2446 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:11,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:11,009 INFO L93 Difference]: Finished difference Result 984 states and 3191 transitions. [2022-01-18 15:16:11,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:16:11,010 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:11,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:11,011 INFO L225 Difference]: With dead ends: 984 [2022-01-18 15:16:11,011 INFO L226 Difference]: Without dead ends: 971 [2022-01-18 15:16:11,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:16:11,011 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:11,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 254 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 623 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-01-18 15:16:11,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-01-18 15:16:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 742. [2022-01-18 15:16:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.3036437246963564) internal successors, (2448), 741 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:11,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2448 transitions. [2022-01-18 15:16:11,020 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2448 transitions. Word has length 21 [2022-01-18 15:16:11,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:11,020 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2448 transitions. [2022-01-18 15:16:11,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:11,020 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2448 transitions. [2022-01-18 15:16:11,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:11,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:11,021 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:11,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Ended with exit code 0 [2022-01-18 15:16:11,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,407 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:11,221 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:11,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:11,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1656523933, now seen corresponding path program 407 times [2022-01-18 15:16:11,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:11,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958081980] [2022-01-18 15:16:11,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:11,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:11,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:11,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958081980] [2022-01-18 15:16:11,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958081980] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:11,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500310065] [2022-01-18 15:16:11,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:11,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:11,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:11,322 INFO L229 MonitoredProcess]: Starting monitored process 408 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:11,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Waiting until timeout for monitored process [2022-01-18 15:16:11,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:11,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:11,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:11,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:11,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:11,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:11,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:11,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:11,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:16:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:11,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:11,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:11,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:16:11,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:11,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:11,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:11,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:11,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500310065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:11,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:11,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:16:11,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477994196] [2022-01-18 15:16:11,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:11,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:11,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:11,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:11,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:11,771 INFO L87 Difference]: Start difference. First operand 742 states and 2448 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:11,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:11,938 INFO L93 Difference]: Finished difference Result 842 states and 2713 transitions. [2022-01-18 15:16:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:16:11,938 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:11,939 INFO L225 Difference]: With dead ends: 842 [2022-01-18 15:16:11,939 INFO L226 Difference]: Without dead ends: 832 [2022-01-18 15:16:11,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:11,940 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:11,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 214 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 466 Invalid, 0 Unknown, 222 Unchecked, 0.2s Time] [2022-01-18 15:16:11,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-18 15:16:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 741. [2022-01-18 15:16:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.3054054054054056) internal successors, (2446), 740 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2446 transitions. [2022-01-18 15:16:11,948 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2446 transitions. Word has length 21 [2022-01-18 15:16:11,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:11,948 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2446 transitions. [2022-01-18 15:16:11,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:11,948 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2446 transitions. [2022-01-18 15:16:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:11,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:11,949 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:11,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Ended with exit code 0 [2022-01-18 15:16:12,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 408 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2022-01-18 15:16:12,149 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:12,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:12,149 INFO L85 PathProgramCache]: Analyzing trace with hash -870469913, now seen corresponding path program 408 times [2022-01-18 15:16:12,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:12,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171581212] [2022-01-18 15:16:12,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:12,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:12,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:12,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171581212] [2022-01-18 15:16:12,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171581212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:12,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950461088] [2022-01-18 15:16:12,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:12,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:12,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:12,252 INFO L229 MonitoredProcess]: Starting monitored process 409 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:12,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Waiting until timeout for monitored process [2022-01-18 15:16:12,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:16:12,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:12,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:12,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:12,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:12,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:12,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:12,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:12,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:12,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:12,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:12,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:12,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:12,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:12,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:12,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:12,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:12,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950461088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:12,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:12,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:12,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386477655] [2022-01-18 15:16:12,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:12,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:12,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:12,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:12,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:12,805 INFO L87 Difference]: Start difference. First operand 741 states and 2446 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:13,104 INFO L93 Difference]: Finished difference Result 1020 states and 3233 transitions. [2022-01-18 15:16:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:16:13,105 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:13,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:13,106 INFO L225 Difference]: With dead ends: 1020 [2022-01-18 15:16:13,106 INFO L226 Difference]: Without dead ends: 966 [2022-01-18 15:16:13,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:16:13,106 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 80 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:13,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 204 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 508 Invalid, 0 Unknown, 144 Unchecked, 0.2s Time] [2022-01-18 15:16:13,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-01-18 15:16:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 749. [2022-01-18 15:16:13,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.3114973262032086) internal successors, (2477), 748 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2477 transitions. [2022-01-18 15:16:13,115 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2477 transitions. Word has length 21 [2022-01-18 15:16:13,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:13,115 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2477 transitions. [2022-01-18 15:16:13,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:13,115 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2477 transitions. [2022-01-18 15:16:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:13,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:13,116 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:13,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Ended with exit code 0 [2022-01-18 15:16:13,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2022-01-18 15:16:13,316 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:13,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1726026641, now seen corresponding path program 409 times [2022-01-18 15:16:13,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:13,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425228779] [2022-01-18 15:16:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:13,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:13,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:13,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425228779] [2022-01-18 15:16:13,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425228779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:13,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347091205] [2022-01-18 15:16:13,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:13,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:13,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:13,428 INFO L229 MonitoredProcess]: Starting monitored process 410 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:13,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Waiting until timeout for monitored process [2022-01-18 15:16:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:13,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:13,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:13,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:13,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:13,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:13,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:13,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:13,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:13,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:13,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:16:13,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:13,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:13,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:13,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:14,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347091205] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:14,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:14,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:16:14,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877770370] [2022-01-18 15:16:14,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:14,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:14,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:14,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:14,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:14,020 INFO L87 Difference]: Start difference. First operand 749 states and 2477 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:14,198 INFO L93 Difference]: Finished difference Result 864 states and 2789 transitions. [2022-01-18 15:16:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:14,198 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:14,199 INFO L225 Difference]: With dead ends: 864 [2022-01-18 15:16:14,199 INFO L226 Difference]: Without dead ends: 806 [2022-01-18 15:16:14,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:14,200 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:14,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 182 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 487 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-01-18 15:16:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-01-18 15:16:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 743. [2022-01-18 15:16:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.31266846361186) internal successors, (2458), 742 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:14,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2458 transitions. [2022-01-18 15:16:14,207 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2458 transitions. Word has length 21 [2022-01-18 15:16:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:14,207 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2458 transitions. [2022-01-18 15:16:14,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:14,208 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2458 transitions. [2022-01-18 15:16:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:14,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:14,208 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:14,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Ended with exit code 0 [2022-01-18 15:16:14,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2022-01-18 15:16:14,409 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:14,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:14,409 INFO L85 PathProgramCache]: Analyzing trace with hash 176547664, now seen corresponding path program 410 times [2022-01-18 15:16:14,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:14,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657551230] [2022-01-18 15:16:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:14,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:14,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:14,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657551230] [2022-01-18 15:16:14,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657551230] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:14,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486976129] [2022-01-18 15:16:14,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:14,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:14,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:14,522 INFO L229 MonitoredProcess]: Starting monitored process 411 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:14,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Waiting until timeout for monitored process [2022-01-18 15:16:14,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:14,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:14,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:14,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:14,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:14,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:14,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:14,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:14,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:14,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:14,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:14,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:14,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:14,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:14,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:14,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:14,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:15,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486976129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:15,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:15,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:16:15,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823013102] [2022-01-18 15:16:15,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:15,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:15,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:15,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:15,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:15,048 INFO L87 Difference]: Start difference. First operand 743 states and 2458 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:15,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:15,414 INFO L93 Difference]: Finished difference Result 1059 states and 3393 transitions. [2022-01-18 15:16:15,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:16:15,414 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:15,415 INFO L225 Difference]: With dead ends: 1059 [2022-01-18 15:16:15,416 INFO L226 Difference]: Without dead ends: 1036 [2022-01-18 15:16:15,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:15,416 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:15,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 255 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 699 Invalid, 0 Unknown, 198 Unchecked, 0.3s Time] [2022-01-18 15:16:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-01-18 15:16:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 743. [2022-01-18 15:16:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.31266846361186) internal successors, (2458), 742 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2458 transitions. [2022-01-18 15:16:15,434 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2458 transitions. Word has length 21 [2022-01-18 15:16:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:15,434 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2458 transitions. [2022-01-18 15:16:15,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2458 transitions. [2022-01-18 15:16:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:15,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:15,435 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:15,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Ended with exit code 0 [2022-01-18 15:16:15,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2022-01-18 15:16:15,636 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:15,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:15,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1267566283, now seen corresponding path program 411 times [2022-01-18 15:16:15,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:15,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133316740] [2022-01-18 15:16:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:15,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:15,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:15,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133316740] [2022-01-18 15:16:15,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133316740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:15,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908176876] [2022-01-18 15:16:15,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:15,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:15,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:15,773 INFO L229 MonitoredProcess]: Starting monitored process 412 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:15,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Waiting until timeout for monitored process [2022-01-18 15:16:15,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:16:15,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:15,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:15,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:15,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:15,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:15,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:15,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:15,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:15,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:16,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:16,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:16,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:16,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:16:16,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:16,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:16,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908176876] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:16,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:16,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:16,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852297399] [2022-01-18 15:16:16,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:16,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:16,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:16,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:16,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:16,216 INFO L87 Difference]: Start difference. First operand 743 states and 2458 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:16,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:16,490 INFO L93 Difference]: Finished difference Result 974 states and 3117 transitions. [2022-01-18 15:16:16,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:16,490 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:16,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:16,491 INFO L225 Difference]: With dead ends: 974 [2022-01-18 15:16:16,491 INFO L226 Difference]: Without dead ends: 941 [2022-01-18 15:16:16,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:16,492 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:16,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 167 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 506 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-01-18 15:16:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-18 15:16:16,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 740. [2022-01-18 15:16:16,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.3031123139377536) internal successors, (2441), 739 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2441 transitions. [2022-01-18 15:16:16,500 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2441 transitions. Word has length 21 [2022-01-18 15:16:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:16,500 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2441 transitions. [2022-01-18 15:16:16,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2441 transitions. [2022-01-18 15:16:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:16,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:16,501 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:16,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Ended with exit code 0 [2022-01-18 15:16:16,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2022-01-18 15:16:16,701 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1470966312, now seen corresponding path program 412 times [2022-01-18 15:16:16,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:16,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356143831] [2022-01-18 15:16:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:16,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:16,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:16,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356143831] [2022-01-18 15:16:16,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356143831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:16,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379852581] [2022-01-18 15:16:16,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:16,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:16,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:16,824 INFO L229 MonitoredProcess]: Starting monitored process 413 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:16,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Waiting until timeout for monitored process [2022-01-18 15:16:16,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:16,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:16,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:16,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:16,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:16,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:16,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:16,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:17,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:17,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:17,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:16:17,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:17,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:17,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:17,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:17,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379852581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:17,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:17,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:17,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730684897] [2022-01-18 15:16:17,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:17,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:17,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:17,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:17,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:17,239 INFO L87 Difference]: Start difference. First operand 740 states and 2441 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:17,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:17,558 INFO L93 Difference]: Finished difference Result 892 states and 2891 transitions. [2022-01-18 15:16:17,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:17,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:17,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:17,560 INFO L225 Difference]: With dead ends: 892 [2022-01-18 15:16:17,560 INFO L226 Difference]: Without dead ends: 873 [2022-01-18 15:16:17,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:17,560 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:17,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 218 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:16:17,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-01-18 15:16:17,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 736. [2022-01-18 15:16:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.3047619047619046) internal successors, (2429), 735 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2429 transitions. [2022-01-18 15:16:17,568 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2429 transitions. Word has length 21 [2022-01-18 15:16:17,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:17,568 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2429 transitions. [2022-01-18 15:16:17,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2429 transitions. [2022-01-18 15:16:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:17,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:17,569 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:17,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Ended with exit code 0 [2022-01-18 15:16:17,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2022-01-18 15:16:17,769 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:17,769 INFO L85 PathProgramCache]: Analyzing trace with hash -28781697, now seen corresponding path program 413 times [2022-01-18 15:16:17,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:17,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208204186] [2022-01-18 15:16:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:17,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:17,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:17,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208204186] [2022-01-18 15:16:17,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208204186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:17,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484077370] [2022-01-18 15:16:17,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:17,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:17,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:17,875 INFO L229 MonitoredProcess]: Starting monitored process 414 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:17,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Waiting until timeout for monitored process [2022-01-18 15:16:17,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:17,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:17,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:17,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:18,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:18,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:18,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:18,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:18,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:18,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:18,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:18,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:18,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:16:18,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:18,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:18,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:18,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:18,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484077370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:18,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:18,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:16:18,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204660826] [2022-01-18 15:16:18,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:18,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:18,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:18,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:18,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:18,395 INFO L87 Difference]: Start difference. First operand 736 states and 2429 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:18,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:18,579 INFO L93 Difference]: Finished difference Result 824 states and 2672 transitions. [2022-01-18 15:16:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:18,579 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:18,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:18,580 INFO L225 Difference]: With dead ends: 824 [2022-01-18 15:16:18,580 INFO L226 Difference]: Without dead ends: 795 [2022-01-18 15:16:18,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:18,580 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:18,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 183 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 525 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-01-18 15:16:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-18 15:16:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 734. [2022-01-18 15:16:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.305593451568895) internal successors, (2423), 733 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2423 transitions. [2022-01-18 15:16:18,588 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2423 transitions. Word has length 21 [2022-01-18 15:16:18,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:18,588 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2423 transitions. [2022-01-18 15:16:18,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:18,588 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2423 transitions. [2022-01-18 15:16:18,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:18,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:18,589 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:18,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Ended with exit code 0 [2022-01-18 15:16:18,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2022-01-18 15:16:18,789 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:18,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:18,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1157021825, now seen corresponding path program 414 times [2022-01-18 15:16:18,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:18,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520836177] [2022-01-18 15:16:18,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:18,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:18,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:18,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520836177] [2022-01-18 15:16:18,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520836177] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:18,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385163916] [2022-01-18 15:16:18,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:18,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:18,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:18,894 INFO L229 MonitoredProcess]: Starting monitored process 415 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:18,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Waiting until timeout for monitored process [2022-01-18 15:16:18,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:16:18,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:18,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:18,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:19,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:19,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:19,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:19,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:19,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:19,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:19,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:19,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:19,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:16:19,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:19,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:19,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:19,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:19,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385163916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:19,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:19,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:16:19,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60089971] [2022-01-18 15:16:19,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:19,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:19,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:19,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:19,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:19,353 INFO L87 Difference]: Start difference. First operand 734 states and 2423 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:19,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:19,520 INFO L93 Difference]: Finished difference Result 811 states and 2630 transitions. [2022-01-18 15:16:19,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:19,520 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:19,521 INFO L225 Difference]: With dead ends: 811 [2022-01-18 15:16:19,521 INFO L226 Difference]: Without dead ends: 798 [2022-01-18 15:16:19,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:19,522 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:19,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 163 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 458 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-01-18 15:16:19,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-01-18 15:16:19,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 733. [2022-01-18 15:16:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.307377049180328) internal successors, (2421), 732 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2421 transitions. [2022-01-18 15:16:19,529 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2421 transitions. Word has length 21 [2022-01-18 15:16:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:19,529 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 2421 transitions. [2022-01-18 15:16:19,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2421 transitions. [2022-01-18 15:16:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:19,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:19,530 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:19,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Ended with exit code 0 [2022-01-18 15:16:19,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,415 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:19,731 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:19,731 INFO L85 PathProgramCache]: Analyzing trace with hash -175604623, now seen corresponding path program 415 times [2022-01-18 15:16:19,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:19,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544335638] [2022-01-18 15:16:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:19,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:19,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:19,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544335638] [2022-01-18 15:16:19,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544335638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:19,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266439230] [2022-01-18 15:16:19,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:19,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:19,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:19,846 INFO L229 MonitoredProcess]: Starting monitored process 416 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:19,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Waiting until timeout for monitored process [2022-01-18 15:16:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:19,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:19,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:19,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:19,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:20,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:20,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:20,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:20,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:20,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:20,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:20,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:20,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:16:20,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:20,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:20,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266439230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:20,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:20,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:20,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361906658] [2022-01-18 15:16:20,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:20,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:20,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:20,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:20,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:20,293 INFO L87 Difference]: Start difference. First operand 733 states and 2421 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:20,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:20,678 INFO L93 Difference]: Finished difference Result 1167 states and 3646 transitions. [2022-01-18 15:16:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:16:20,678 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:20,679 INFO L225 Difference]: With dead ends: 1167 [2022-01-18 15:16:20,679 INFO L226 Difference]: Without dead ends: 1113 [2022-01-18 15:16:20,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:16:20,680 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:20,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 190 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-01-18 15:16:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 753. [2022-01-18 15:16:20,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.333776595744681) internal successors, (2507), 752 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:20,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2507 transitions. [2022-01-18 15:16:20,689 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2507 transitions. Word has length 21 [2022-01-18 15:16:20,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:20,689 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2507 transitions. [2022-01-18 15:16:20,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:20,689 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2507 transitions. [2022-01-18 15:16:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:20,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:20,690 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:20,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:20,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2022-01-18 15:16:20,891 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1031161351, now seen corresponding path program 416 times [2022-01-18 15:16:20,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:20,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522209706] [2022-01-18 15:16:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:20,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:20,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:20,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522209706] [2022-01-18 15:16:20,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522209706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:20,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196196412] [2022-01-18 15:16:20,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:20,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:20,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:20,991 INFO L229 MonitoredProcess]: Starting monitored process 417 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:20,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Waiting until timeout for monitored process [2022-01-18 15:16:21,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:21,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:21,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:21,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:21,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:21,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:21,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:21,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:16:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:21,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:21,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:21,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:21,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:21,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:21,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:21,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:21,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196196412] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:21,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:21,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:16:21,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285558266] [2022-01-18 15:16:21,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:21,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:21,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:21,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:21,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:21,354 INFO L87 Difference]: Start difference. First operand 753 states and 2507 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:21,583 INFO L93 Difference]: Finished difference Result 884 states and 2856 transitions. [2022-01-18 15:16:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:21,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:21,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:21,585 INFO L225 Difference]: With dead ends: 884 [2022-01-18 15:16:21,585 INFO L226 Difference]: Without dead ends: 812 [2022-01-18 15:16:21,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:21,585 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:21,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 177 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-18 15:16:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 747. [2022-01-18 15:16:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.3270777479892764) internal successors, (2482), 746 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2482 transitions. [2022-01-18 15:16:21,593 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2482 transitions. Word has length 21 [2022-01-18 15:16:21,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:21,593 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 2482 transitions. [2022-01-18 15:16:21,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2482 transitions. [2022-01-18 15:16:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:21,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:21,594 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:21,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:21,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,417 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:21,795 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:21,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:21,795 INFO L85 PathProgramCache]: Analyzing trace with hash -245107331, now seen corresponding path program 417 times [2022-01-18 15:16:21,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:21,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584569959] [2022-01-18 15:16:21,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:21,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:21,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:21,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584569959] [2022-01-18 15:16:21,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584569959] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:21,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463336001] [2022-01-18 15:16:21,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:21,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:21,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:21,905 INFO L229 MonitoredProcess]: Starting monitored process 418 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:21,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Waiting until timeout for monitored process [2022-01-18 15:16:21,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:16:21,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:21,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:21,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:22,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:22,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:22,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:22,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:22,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:22,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:22,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:22,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:22,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:16:22,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:22,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:22,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463336001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:22,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:22,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:22,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163870862] [2022-01-18 15:16:22,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:22,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:22,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:22,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:22,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:22,344 INFO L87 Difference]: Start difference. First operand 747 states and 2482 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:22,627 INFO L93 Difference]: Finished difference Result 1011 states and 3212 transitions. [2022-01-18 15:16:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:16:22,627 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:22,629 INFO L225 Difference]: With dead ends: 1011 [2022-01-18 15:16:22,629 INFO L226 Difference]: Without dead ends: 969 [2022-01-18 15:16:22,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:22,629 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 75 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:22,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 185 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:16:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-01-18 15:16:22,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 736. [2022-01-18 15:16:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.3170068027210884) internal successors, (2438), 735 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:22,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2438 transitions. [2022-01-18 15:16:22,638 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2438 transitions. Word has length 21 [2022-01-18 15:16:22,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:22,638 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2438 transitions. [2022-01-18 15:16:22,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2438 transitions. [2022-01-18 15:16:22,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:22,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:22,639 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:22,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Ended with exit code 0 [2022-01-18 15:16:22,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2022-01-18 15:16:22,839 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:22,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:22,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1025170136, now seen corresponding path program 418 times [2022-01-18 15:16:22,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:22,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110448868] [2022-01-18 15:16:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:22,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:22,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:22,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110448868] [2022-01-18 15:16:22,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110448868] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:22,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328830504] [2022-01-18 15:16:22,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:22,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:22,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:22,966 INFO L229 MonitoredProcess]: Starting monitored process 419 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:22,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Waiting until timeout for monitored process [2022-01-18 15:16:22,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:22,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:22,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:22,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:23,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:23,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:23,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:23,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:23,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:23,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:23,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:23,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:16:23,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:23,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:23,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:23,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:23,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328830504] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:23,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:23,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:23,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570461048] [2022-01-18 15:16:23,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:23,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:23,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:23,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:23,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:23,405 INFO L87 Difference]: Start difference. First operand 736 states and 2438 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:23,796 INFO L93 Difference]: Finished difference Result 1048 states and 3346 transitions. [2022-01-18 15:16:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:16:23,796 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:23,797 INFO L225 Difference]: With dead ends: 1048 [2022-01-18 15:16:23,798 INFO L226 Difference]: Without dead ends: 1025 [2022-01-18 15:16:23,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:16:23,798 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:23,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 250 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:16:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-01-18 15:16:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 744. [2022-01-18 15:16:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.3243606998654105) internal successors, (2470), 743 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2470 transitions. [2022-01-18 15:16:23,807 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2470 transitions. Word has length 21 [2022-01-18 15:16:23,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:23,807 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 2470 transitions. [2022-01-18 15:16:23,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2470 transitions. [2022-01-18 15:16:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:23,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:23,808 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:23,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:24,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2022-01-18 15:16:24,008 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:24,008 INFO L85 PathProgramCache]: Analyzing trace with hash -418943811, now seen corresponding path program 419 times [2022-01-18 15:16:24,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:24,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746919847] [2022-01-18 15:16:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:24,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:24,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:24,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746919847] [2022-01-18 15:16:24,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746919847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:24,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689746488] [2022-01-18 15:16:24,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:24,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:24,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:24,112 INFO L229 MonitoredProcess]: Starting monitored process 420 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:24,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Waiting until timeout for monitored process [2022-01-18 15:16:24,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:24,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:24,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:24,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:24,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:24,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:24,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:24,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:24,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:24,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:24,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:24,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:24,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:24,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:24,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:24,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:24,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:24,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689746488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:24,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:24,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:24,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167585526] [2022-01-18 15:16:24,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:24,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:24,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:24,561 INFO L87 Difference]: Start difference. First operand 744 states and 2470 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:24,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:24,811 INFO L93 Difference]: Finished difference Result 887 states and 2880 transitions. [2022-01-18 15:16:24,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:16:24,811 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:24,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:24,812 INFO L225 Difference]: With dead ends: 887 [2022-01-18 15:16:24,812 INFO L226 Difference]: Without dead ends: 866 [2022-01-18 15:16:24,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:24,813 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:24,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 193 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 566 Invalid, 0 Unknown, 164 Unchecked, 0.2s Time] [2022-01-18 15:16:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-01-18 15:16:24,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 742. [2022-01-18 15:16:24,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.3171390013495277) internal successors, (2458), 741 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2458 transitions. [2022-01-18 15:16:24,821 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2458 transitions. Word has length 21 [2022-01-18 15:16:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:24,821 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2458 transitions. [2022-01-18 15:16:24,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2458 transitions. [2022-01-18 15:16:24,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:24,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:24,822 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:24,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Ended with exit code 0 [2022-01-18 15:16:25,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2022-01-18 15:16:25,022 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:25,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1128680290, now seen corresponding path program 420 times [2022-01-18 15:16:25,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:25,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138791866] [2022-01-18 15:16:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:25,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:25,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:25,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138791866] [2022-01-18 15:16:25,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138791866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:25,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007859915] [2022-01-18 15:16:25,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:25,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:25,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:25,146 INFO L229 MonitoredProcess]: Starting monitored process 421 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:25,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Waiting until timeout for monitored process [2022-01-18 15:16:25,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:16:25,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:25,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:25,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:25,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:25,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:25,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:25,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:25,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:25,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:25,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:16:25,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:25,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:25,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:25,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:25,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007859915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:25,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:25,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:25,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904335837] [2022-01-18 15:16:25,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:25,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:25,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:25,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:25,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:25,564 INFO L87 Difference]: Start difference. First operand 742 states and 2458 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:25,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:25,891 INFO L93 Difference]: Finished difference Result 945 states and 3043 transitions. [2022-01-18 15:16:25,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:25,891 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:25,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:25,893 INFO L225 Difference]: With dead ends: 945 [2022-01-18 15:16:25,893 INFO L226 Difference]: Without dead ends: 926 [2022-01-18 15:16:25,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:25,893 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:25,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 220 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:16:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-01-18 15:16:25,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 734. [2022-01-18 15:16:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.30968622100955) internal successors, (2426), 733 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2426 transitions. [2022-01-18 15:16:25,901 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2426 transitions. Word has length 21 [2022-01-18 15:16:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:25,901 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2426 transitions. [2022-01-18 15:16:25,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:25,902 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2426 transitions. [2022-01-18 15:16:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:25,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:25,902 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:25,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:26,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,421 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:26,103 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:26,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1334025299, now seen corresponding path program 421 times [2022-01-18 15:16:26,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:26,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110244944] [2022-01-18 15:16:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:26,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:26,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:26,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110244944] [2022-01-18 15:16:26,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110244944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:26,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215737918] [2022-01-18 15:16:26,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:26,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:26,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:26,228 INFO L229 MonitoredProcess]: Starting monitored process 422 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:26,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Waiting until timeout for monitored process [2022-01-18 15:16:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:26,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:26,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:26,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:26,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:26,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:26,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:26,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:26,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:26,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:26,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:26,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:16:26,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:26,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:26,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215737918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:26,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:26,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:26,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721974265] [2022-01-18 15:16:26,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:26,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:26,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:26,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:26,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:26,683 INFO L87 Difference]: Start difference. First operand 734 states and 2426 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:27,007 INFO L93 Difference]: Finished difference Result 1002 states and 3187 transitions. [2022-01-18 15:16:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:27,007 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:27,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:27,008 INFO L225 Difference]: With dead ends: 1002 [2022-01-18 15:16:27,008 INFO L226 Difference]: Without dead ends: 981 [2022-01-18 15:16:27,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:16:27,009 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:27,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 225 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:16:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-01-18 15:16:27,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 729. [2022-01-18 15:16:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.309065934065934) internal successors, (2409), 728 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2409 transitions. [2022-01-18 15:16:27,017 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2409 transitions. Word has length 21 [2022-01-18 15:16:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:27,017 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 2409 transitions. [2022-01-18 15:16:27,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2409 transitions. [2022-01-18 15:16:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:27,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:27,018 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:27,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Ended with exit code 0 [2022-01-18 15:16:27,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2022-01-18 15:16:27,219 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:27,219 INFO L85 PathProgramCache]: Analyzing trace with hash -708027060, now seen corresponding path program 422 times [2022-01-18 15:16:27,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:27,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516259137] [2022-01-18 15:16:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:27,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:27,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:27,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516259137] [2022-01-18 15:16:27,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516259137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:27,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059247268] [2022-01-18 15:16:27,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:27,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:27,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:27,335 INFO L229 MonitoredProcess]: Starting monitored process 423 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:27,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Waiting until timeout for monitored process [2022-01-18 15:16:27,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:27,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:27,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:27,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:27,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:27,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:27,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:27,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:27,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:27,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:27,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:27,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:27,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:27,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:27,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:16:27,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:27,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:27,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059247268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:27,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:27,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:27,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699645258] [2022-01-18 15:16:27,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:27,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:27,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:27,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:27,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:27,801 INFO L87 Difference]: Start difference. First operand 729 states and 2409 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:28,072 INFO L93 Difference]: Finished difference Result 956 states and 3084 transitions. [2022-01-18 15:16:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:16:28,072 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:28,073 INFO L225 Difference]: With dead ends: 956 [2022-01-18 15:16:28,073 INFO L226 Difference]: Without dead ends: 929 [2022-01-18 15:16:28,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:16:28,074 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:28,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 197 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 575 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-01-18 15:16:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-01-18 15:16:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 734. [2022-01-18 15:16:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.30968622100955) internal successors, (2426), 733 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:28,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2426 transitions. [2022-01-18 15:16:28,082 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2426 transitions. Word has length 21 [2022-01-18 15:16:28,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:28,082 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2426 transitions. [2022-01-18 15:16:28,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:28,082 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2426 transitions. [2022-01-18 15:16:28,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:28,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:28,083 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:28,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Ended with exit code 0 [2022-01-18 15:16:28,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2022-01-18 15:16:28,283 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:28,284 INFO L85 PathProgramCache]: Analyzing trace with hash -104786063, now seen corresponding path program 423 times [2022-01-18 15:16:28,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:28,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473192231] [2022-01-18 15:16:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:28,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:28,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:28,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473192231] [2022-01-18 15:16:28,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473192231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:28,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319908401] [2022-01-18 15:16:28,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:28,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:28,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:28,448 INFO L229 MonitoredProcess]: Starting monitored process 424 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:28,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Waiting until timeout for monitored process [2022-01-18 15:16:28,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:16:28,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:28,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:28,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:28,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:28,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:28,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:28,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:28,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:28,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:28,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:28,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:28,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:28,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:28,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:28,911 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:28,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:28,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319908401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:28,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:28,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:28,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801382683] [2022-01-18 15:16:28,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:28,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:28,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:28,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:28,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:28,954 INFO L87 Difference]: Start difference. First operand 734 states and 2426 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:29,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:29,391 INFO L93 Difference]: Finished difference Result 1139 states and 3614 transitions. [2022-01-18 15:16:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:16:29,392 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:29,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:29,393 INFO L225 Difference]: With dead ends: 1139 [2022-01-18 15:16:29,393 INFO L226 Difference]: Without dead ends: 1112 [2022-01-18 15:16:29,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:16:29,394 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 82 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:29,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 298 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 799 Invalid, 0 Unknown, 243 Unchecked, 0.3s Time] [2022-01-18 15:16:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2022-01-18 15:16:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 738. [2022-01-18 15:16:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.3134328358208953) internal successors, (2442), 737 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2442 transitions. [2022-01-18 15:16:29,403 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2442 transitions. Word has length 21 [2022-01-18 15:16:29,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:29,403 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 2442 transitions. [2022-01-18 15:16:29,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:29,403 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2442 transitions. [2022-01-18 15:16:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:29,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:29,404 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:29,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:29,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,424 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:29,604 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:29,605 INFO L85 PathProgramCache]: Analyzing trace with hash 703271860, now seen corresponding path program 424 times [2022-01-18 15:16:29,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:29,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946448261] [2022-01-18 15:16:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:29,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:29,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:29,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946448261] [2022-01-18 15:16:29,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946448261] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:29,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341420136] [2022-01-18 15:16:29,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:29,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:29,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:29,717 INFO L229 MonitoredProcess]: Starting monitored process 425 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:29,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Waiting until timeout for monitored process [2022-01-18 15:16:29,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:29,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:29,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:29,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:29,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:29,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:29,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:29,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:29,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:29,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:29,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:30,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:30,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:30,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:30,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:16:30,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:30,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:30,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341420136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:30,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:30,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:30,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673035042] [2022-01-18 15:16:30,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:30,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:30,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:30,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:30,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:30,194 INFO L87 Difference]: Start difference. First operand 738 states and 2442 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:30,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:30,569 INFO L93 Difference]: Finished difference Result 1037 states and 3313 transitions. [2022-01-18 15:16:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:16:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:30,571 INFO L225 Difference]: With dead ends: 1037 [2022-01-18 15:16:30,571 INFO L226 Difference]: Without dead ends: 1010 [2022-01-18 15:16:30,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:30,571 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 77 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:30,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 272 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 718 Invalid, 0 Unknown, 123 Unchecked, 0.3s Time] [2022-01-18 15:16:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-01-18 15:16:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 738. [2022-01-18 15:16:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.310719131614654) internal successors, (2440), 737 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2440 transitions. [2022-01-18 15:16:30,580 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2440 transitions. Word has length 21 [2022-01-18 15:16:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:30,580 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 2440 transitions. [2022-01-18 15:16:30,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2440 transitions. [2022-01-18 15:16:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:30,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:30,581 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:30,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Ended with exit code 0 [2022-01-18 15:16:30,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435,425 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:30,781 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:30,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:30,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1102849263, now seen corresponding path program 425 times [2022-01-18 15:16:30,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:30,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506845792] [2022-01-18 15:16:30,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:30,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:30,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:30,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506845792] [2022-01-18 15:16:30,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506845792] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:30,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486232282] [2022-01-18 15:16:30,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:30,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:30,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:30,913 INFO L229 MonitoredProcess]: Starting monitored process 426 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:30,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Waiting until timeout for monitored process [2022-01-18 15:16:30,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:16:30,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:30,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:30,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:31,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:31,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:31,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:31,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:31,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:31,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:16:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:31,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:31,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:31,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:31,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:31,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:31,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:31,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:31,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486232282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:31,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:31,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:31,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580722814] [2022-01-18 15:16:31,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:31,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:31,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:31,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:31,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:31,419 INFO L87 Difference]: Start difference. First operand 738 states and 2440 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:31,809 INFO L93 Difference]: Finished difference Result 1047 states and 3352 transitions. [2022-01-18 15:16:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:16:31,810 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:31,811 INFO L225 Difference]: With dead ends: 1047 [2022-01-18 15:16:31,811 INFO L226 Difference]: Without dead ends: 1026 [2022-01-18 15:16:31,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:16:31,811 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:31,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 261 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 687 Invalid, 0 Unknown, 250 Unchecked, 0.2s Time] [2022-01-18 15:16:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-01-18 15:16:31,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 736. [2022-01-18 15:16:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.312925170068027) internal successors, (2435), 735 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2435 transitions. [2022-01-18 15:16:31,820 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2435 transitions. Word has length 21 [2022-01-18 15:16:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:31,820 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2435 transitions. [2022-01-18 15:16:31,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2435 transitions. [2022-01-18 15:16:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:31,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:31,821 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:31,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Ended with exit code 0 [2022-01-18 15:16:32,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 426 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2022-01-18 15:16:32,022 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2049239911, now seen corresponding path program 426 times [2022-01-18 15:16:32,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:32,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404754432] [2022-01-18 15:16:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:32,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:32,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:32,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404754432] [2022-01-18 15:16:32,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404754432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:32,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27665846] [2022-01-18 15:16:32,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:32,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:32,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:32,129 INFO L229 MonitoredProcess]: Starting monitored process 427 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:32,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Waiting until timeout for monitored process [2022-01-18 15:16:32,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:16:32,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:32,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:32,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:32,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:32,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:32,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:32,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:32,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:32,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:16:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:32,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:32,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:32,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:16:32,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:32,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:32,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:32,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:32,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27665846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:32,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:32,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:16:32,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766990246] [2022-01-18 15:16:32,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:32,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:32,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:32,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:32,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:32,514 INFO L87 Difference]: Start difference. First operand 736 states and 2435 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:32,651 INFO L93 Difference]: Finished difference Result 806 states and 2635 transitions. [2022-01-18 15:16:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:32,651 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:32,652 INFO L225 Difference]: With dead ends: 806 [2022-01-18 15:16:32,652 INFO L226 Difference]: Without dead ends: 784 [2022-01-18 15:16:32,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:32,652 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:32,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 130 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 377 Invalid, 0 Unknown, 112 Unchecked, 0.1s Time] [2022-01-18 15:16:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-01-18 15:16:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 737. [2022-01-18 15:16:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.3152173913043477) internal successors, (2440), 736 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2440 transitions. [2022-01-18 15:16:32,660 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2440 transitions. Word has length 21 [2022-01-18 15:16:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:32,660 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2440 transitions. [2022-01-18 15:16:32,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:32,660 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2440 transitions. [2022-01-18 15:16:32,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:32,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:32,661 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:32,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Ended with exit code 0 [2022-01-18 15:16:32,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2022-01-18 15:16:32,861 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:32,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1468843129, now seen corresponding path program 427 times [2022-01-18 15:16:32,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:32,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413374996] [2022-01-18 15:16:32,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:32,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:32,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:32,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413374996] [2022-01-18 15:16:32,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413374996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:32,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395590517] [2022-01-18 15:16:32,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:32,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:32,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:32,965 INFO L229 MonitoredProcess]: Starting monitored process 428 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:32,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Waiting until timeout for monitored process [2022-01-18 15:16:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:32,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:32,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:33,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:33,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:33,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:33,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:33,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:33,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:16:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:33,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:33,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:33,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:16:33,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:33,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:33,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:33,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:33,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395590517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:33,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:33,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:16:33,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536176749] [2022-01-18 15:16:33,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:33,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:33,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:33,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:33,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:33,374 INFO L87 Difference]: Start difference. First operand 737 states and 2440 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:33,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:33,442 INFO L93 Difference]: Finished difference Result 883 states and 2840 transitions. [2022-01-18 15:16:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:33,443 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:33,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:33,444 INFO L225 Difference]: With dead ends: 883 [2022-01-18 15:16:33,444 INFO L226 Difference]: Without dead ends: 839 [2022-01-18 15:16:33,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:33,444 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:33,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 133 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-01-18 15:16:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-01-18 15:16:33,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 740. [2022-01-18 15:16:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.317997293640054) internal successors, (2452), 739 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2452 transitions. [2022-01-18 15:16:33,452 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2452 transitions. Word has length 21 [2022-01-18 15:16:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:33,452 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2452 transitions. [2022-01-18 15:16:33,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:33,452 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2452 transitions. [2022-01-18 15:16:33,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:33,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:33,453 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:33,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Ended with exit code 0 [2022-01-18 15:16:33,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2022-01-18 15:16:33,653 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:33,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:33,654 INFO L85 PathProgramCache]: Analyzing trace with hash 591387152, now seen corresponding path program 428 times [2022-01-18 15:16:33,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:33,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264219692] [2022-01-18 15:16:33,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:33,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:33,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:33,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264219692] [2022-01-18 15:16:33,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264219692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:33,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835987177] [2022-01-18 15:16:33,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:33,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:33,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:33,754 INFO L229 MonitoredProcess]: Starting monitored process 429 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:33,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Waiting until timeout for monitored process [2022-01-18 15:16:33,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:33,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:33,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:33,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:33,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:33,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:33,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:33,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:33,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:33,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:34,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:34,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:34,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:34,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:34,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:34,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:34,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835987177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:34,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:34,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:34,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620298237] [2022-01-18 15:16:34,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:34,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:34,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:34,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:34,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:34,189 INFO L87 Difference]: Start difference. First operand 740 states and 2452 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:34,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:34,466 INFO L93 Difference]: Finished difference Result 941 states and 3046 transitions. [2022-01-18 15:16:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:16:34,466 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:34,468 INFO L225 Difference]: With dead ends: 941 [2022-01-18 15:16:34,468 INFO L226 Difference]: Without dead ends: 918 [2022-01-18 15:16:34,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:16:34,468 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:34,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 169 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 578 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-01-18 15:16:34,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-01-18 15:16:34,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 740. [2022-01-18 15:16:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.317997293640054) internal successors, (2452), 739 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:34,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2452 transitions. [2022-01-18 15:16:34,476 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2452 transitions. Word has length 21 [2022-01-18 15:16:34,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:34,476 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2452 transitions. [2022-01-18 15:16:34,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:34,476 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2452 transitions. [2022-01-18 15:16:34,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:34,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:34,477 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:34,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Ended with exit code 0 [2022-01-18 15:16:34,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,429 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:34,678 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:34,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1194628149, now seen corresponding path program 429 times [2022-01-18 15:16:34,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:34,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243103741] [2022-01-18 15:16:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:34,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:34,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:34,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243103741] [2022-01-18 15:16:34,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243103741] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:34,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022085208] [2022-01-18 15:16:34,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:34,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:34,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:34,799 INFO L229 MonitoredProcess]: Starting monitored process 430 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:34,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Waiting until timeout for monitored process [2022-01-18 15:16:34,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:16:34,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:34,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:34,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:34,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:34,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:34,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:34,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:34,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:35,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:35,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:35,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:35,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:35,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:35,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:35,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:35,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022085208] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:35,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:35,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:16:35,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95374548] [2022-01-18 15:16:35,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:35,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:35,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:35,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:35,247 INFO L87 Difference]: Start difference. First operand 740 states and 2452 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:35,567 INFO L93 Difference]: Finished difference Result 988 states and 3182 transitions. [2022-01-18 15:16:35,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:35,567 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:35,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:35,569 INFO L225 Difference]: With dead ends: 988 [2022-01-18 15:16:35,569 INFO L226 Difference]: Without dead ends: 961 [2022-01-18 15:16:35,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:35,569 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:35,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 221 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 540 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-01-18 15:16:35,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-01-18 15:16:35,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 745. [2022-01-18 15:16:35,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.3306451612903225) internal successors, (2478), 744 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2478 transitions. [2022-01-18 15:16:35,578 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2478 transitions. Word has length 21 [2022-01-18 15:16:35,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:35,578 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2478 transitions. [2022-01-18 15:16:35,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:35,578 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2478 transitions. [2022-01-18 15:16:35,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:35,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:35,579 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:35,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Ended with exit code 0 [2022-01-18 15:16:35,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable440 [2022-01-18 15:16:35,779 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:35,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:35,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1945729757, now seen corresponding path program 430 times [2022-01-18 15:16:35,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:35,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531857711] [2022-01-18 15:16:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:35,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:35,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:35,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531857711] [2022-01-18 15:16:35,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531857711] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:35,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135153346] [2022-01-18 15:16:35,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:35,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:35,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:35,882 INFO L229 MonitoredProcess]: Starting monitored process 431 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:35,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Waiting until timeout for monitored process [2022-01-18 15:16:35,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:35,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:35,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:35,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:35,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:35,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:36,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:36,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:36,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:36,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:36,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:36,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:36,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:16:36,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:36,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:36,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:36,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:36,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135153346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:36,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:36,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:16:36,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337207761] [2022-01-18 15:16:36,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:36,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:16:36,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:36,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:16:36,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:36,254 INFO L87 Difference]: Start difference. First operand 745 states and 2478 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:36,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:36,416 INFO L93 Difference]: Finished difference Result 862 states and 2818 transitions. [2022-01-18 15:16:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:36,416 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:36,418 INFO L225 Difference]: With dead ends: 862 [2022-01-18 15:16:36,418 INFO L226 Difference]: Without dead ends: 833 [2022-01-18 15:16:36,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:16:36,418 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:36,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 174 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 441 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-01-18 15:16:36,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-01-18 15:16:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 747. [2022-01-18 15:16:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.3284182305630026) internal successors, (2483), 746 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:36,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2483 transitions. [2022-01-18 15:16:36,426 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2483 transitions. Word has length 21 [2022-01-18 15:16:36,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:36,426 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 2483 transitions. [2022-01-18 15:16:36,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:36,426 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2483 transitions. [2022-01-18 15:16:36,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:36,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:36,427 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:36,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:36,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2022-01-18 15:16:36,627 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:36,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:36,627 INFO L85 PathProgramCache]: Analyzing trace with hash -573055112, now seen corresponding path program 431 times [2022-01-18 15:16:36,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:36,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701244148] [2022-01-18 15:16:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:36,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:36,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:36,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701244148] [2022-01-18 15:16:36,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701244148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:36,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868641312] [2022-01-18 15:16:36,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:36,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:36,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:36,747 INFO L229 MonitoredProcess]: Starting monitored process 432 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:36,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Waiting until timeout for monitored process [2022-01-18 15:16:36,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:36,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:36,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:36,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:36,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:36,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:36,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:36,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:36,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:36,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:36,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:37,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:37,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:37,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:37,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:16:37,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:37,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:37,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868641312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:37,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:37,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:37,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786545799] [2022-01-18 15:16:37,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:37,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:37,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:37,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:37,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:37,228 INFO L87 Difference]: Start difference. First operand 747 states and 2483 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:37,520 INFO L93 Difference]: Finished difference Result 1059 states and 3375 transitions. [2022-01-18 15:16:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:16:37,520 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:37,521 INFO L225 Difference]: With dead ends: 1059 [2022-01-18 15:16:37,521 INFO L226 Difference]: Without dead ends: 1032 [2022-01-18 15:16:37,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:37,522 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 89 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:37,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 160 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 414 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-01-18 15:16:37,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-01-18 15:16:37,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 749. [2022-01-18 15:16:37,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.3262032085561497) internal successors, (2488), 748 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2488 transitions. [2022-01-18 15:16:37,531 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2488 transitions. Word has length 21 [2022-01-18 15:16:37,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:37,531 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2488 transitions. [2022-01-18 15:16:37,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:37,531 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2488 transitions. [2022-01-18 15:16:37,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:37,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:37,532 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:37,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:37,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2022-01-18 15:16:37,732 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:37,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:37,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1184795275, now seen corresponding path program 432 times [2022-01-18 15:16:37,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:37,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596134077] [2022-01-18 15:16:37,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:37,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:37,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:37,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596134077] [2022-01-18 15:16:37,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596134077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:37,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7166597] [2022-01-18 15:16:37,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:37,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:37,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:37,836 INFO L229 MonitoredProcess]: Starting monitored process 433 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:37,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Waiting until timeout for monitored process [2022-01-18 15:16:37,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:16:37,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:37,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:37,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:37,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:37,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:38,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:38,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:38,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:38,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:16:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:38,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:38,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:38,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:16:38,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:38,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:38,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:38,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:38,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7166597] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:38,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:38,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:16:38,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438243643] [2022-01-18 15:16:38,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:38,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:38,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:38,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:38,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:38,242 INFO L87 Difference]: Start difference. First operand 749 states and 2488 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:38,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:38,418 INFO L93 Difference]: Finished difference Result 891 states and 2858 transitions. [2022-01-18 15:16:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:16:38,418 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:38,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:38,420 INFO L225 Difference]: With dead ends: 891 [2022-01-18 15:16:38,420 INFO L226 Difference]: Without dead ends: 847 [2022-01-18 15:16:38,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:38,420 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:38,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 155 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 387 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2022-01-18 15:16:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-01-18 15:16:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 751. [2022-01-18 15:16:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.3266666666666667) internal successors, (2495), 750 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:38,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2495 transitions. [2022-01-18 15:16:38,428 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2495 transitions. Word has length 21 [2022-01-18 15:16:38,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:38,428 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2495 transitions. [2022-01-18 15:16:38,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:38,428 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2495 transitions. [2022-01-18 15:16:38,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:38,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:38,429 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:38,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Ended with exit code 0 [2022-01-18 15:16:38,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2022-01-18 15:16:38,630 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:38,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:38,630 INFO L85 PathProgramCache]: Analyzing trace with hash 23050804, now seen corresponding path program 433 times [2022-01-18 15:16:38,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:38,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245741908] [2022-01-18 15:16:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:38,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:38,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:38,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245741908] [2022-01-18 15:16:38,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245741908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:38,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993963128] [2022-01-18 15:16:38,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:38,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:38,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:38,753 INFO L229 MonitoredProcess]: Starting monitored process 434 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:38,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Waiting until timeout for monitored process [2022-01-18 15:16:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:38,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:38,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:38,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:38,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:38,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:38,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:38,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:38,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:38,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:39,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:39,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:39,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:39,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:16:39,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:39,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:39,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993963128] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:39,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:39,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:39,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120679464] [2022-01-18 15:16:39,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:39,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:39,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:39,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:39,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:39,191 INFO L87 Difference]: Start difference. First operand 751 states and 2495 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:39,541 INFO L93 Difference]: Finished difference Result 1064 states and 3378 transitions. [2022-01-18 15:16:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:16:39,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:39,543 INFO L225 Difference]: With dead ends: 1064 [2022-01-18 15:16:39,543 INFO L226 Difference]: Without dead ends: 1041 [2022-01-18 15:16:39,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:16:39,543 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:39,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 269 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 551 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-01-18 15:16:39,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-01-18 15:16:39,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 751. [2022-01-18 15:16:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.3266666666666667) internal successors, (2495), 750 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2495 transitions. [2022-01-18 15:16:39,552 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2495 transitions. Word has length 21 [2022-01-18 15:16:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:39,553 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2495 transitions. [2022-01-18 15:16:39,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2495 transitions. [2022-01-18 15:16:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:39,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:39,554 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:39,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:39,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable444,434 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:39,754 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:39,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:39,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2019418305, now seen corresponding path program 434 times [2022-01-18 15:16:39,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:39,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733663110] [2022-01-18 15:16:39,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:39,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:39,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:39,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733663110] [2022-01-18 15:16:39,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733663110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:39,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332694647] [2022-01-18 15:16:39,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:39,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:39,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:39,859 INFO L229 MonitoredProcess]: Starting monitored process 435 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:39,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Waiting until timeout for monitored process [2022-01-18 15:16:39,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:39,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:39,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:39,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:39,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:40,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:40,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:40,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:40,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:40,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:40,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:40,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:16:40,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:40,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:40,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:40,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:40,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:40,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332694647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:40,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:40,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:16:40,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190219920] [2022-01-18 15:16:40,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:40,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:40,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:40,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:40,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:40,259 INFO L87 Difference]: Start difference. First operand 751 states and 2495 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:40,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:40,484 INFO L93 Difference]: Finished difference Result 905 states and 2915 transitions. [2022-01-18 15:16:40,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:40,485 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:40,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:40,486 INFO L225 Difference]: With dead ends: 905 [2022-01-18 15:16:40,486 INFO L226 Difference]: Without dead ends: 847 [2022-01-18 15:16:40,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:40,486 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:40,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 230 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 637 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-01-18 15:16:40,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-01-18 15:16:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 746. [2022-01-18 15:16:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.32751677852349) internal successors, (2479), 745 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2479 transitions. [2022-01-18 15:16:40,494 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2479 transitions. Word has length 21 [2022-01-18 15:16:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:40,494 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2479 transitions. [2022-01-18 15:16:40,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2479 transitions. [2022-01-18 15:16:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:40,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:40,495 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:40,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Ended with exit code 0 [2022-01-18 15:16:40,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2022-01-18 15:16:40,696 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:40,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:40,696 INFO L85 PathProgramCache]: Analyzing trace with hash -875627883, now seen corresponding path program 435 times [2022-01-18 15:16:40,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:40,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507071884] [2022-01-18 15:16:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:40,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:40,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:40,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507071884] [2022-01-18 15:16:40,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507071884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:40,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516955579] [2022-01-18 15:16:40,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:40,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:40,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:40,798 INFO L229 MonitoredProcess]: Starting monitored process 436 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:40,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Waiting until timeout for monitored process [2022-01-18 15:16:40,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:16:40,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:40,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:40,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:40,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:41,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:41,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:41,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:41,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:16:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:41,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:41,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:41,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:41,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:41,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:41,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:41,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:41,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516955579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:41,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:41,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:41,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956993482] [2022-01-18 15:16:41,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:41,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:41,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:41,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:41,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:41,290 INFO L87 Difference]: Start difference. First operand 746 states and 2479 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:41,570 INFO L93 Difference]: Finished difference Result 961 states and 3131 transitions. [2022-01-18 15:16:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:41,571 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:41,572 INFO L225 Difference]: With dead ends: 961 [2022-01-18 15:16:41,572 INFO L226 Difference]: Without dead ends: 940 [2022-01-18 15:16:41,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:16:41,572 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:41,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 152 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 502 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2022-01-18 15:16:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-01-18 15:16:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 749. [2022-01-18 15:16:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.3302139037433154) internal successors, (2491), 748 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2491 transitions. [2022-01-18 15:16:41,580 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2491 transitions. Word has length 21 [2022-01-18 15:16:41,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:41,580 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2491 transitions. [2022-01-18 15:16:41,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:41,580 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2491 transitions. [2022-01-18 15:16:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:41,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:41,581 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:41,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:41,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 436 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2022-01-18 15:16:41,782 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:41,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:41,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1652512139, now seen corresponding path program 436 times [2022-01-18 15:16:41,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:41,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708494000] [2022-01-18 15:16:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:41,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:41,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:41,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708494000] [2022-01-18 15:16:41,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708494000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:41,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738520904] [2022-01-18 15:16:41,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:41,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:41,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:41,935 INFO L229 MonitoredProcess]: Starting monitored process 437 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:41,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Waiting until timeout for monitored process [2022-01-18 15:16:41,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:41,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:41,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:41,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:42,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:42,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:42,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:42,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:42,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:42,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:16:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:42,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:42,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:42,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:42,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:42,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:42,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:42,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:42,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738520904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:42,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:42,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:42,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930929454] [2022-01-18 15:16:42,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:42,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:42,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:42,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:42,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:42,418 INFO L87 Difference]: Start difference. First operand 749 states and 2491 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:42,676 INFO L93 Difference]: Finished difference Result 1001 states and 3231 transitions. [2022-01-18 15:16:42,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:16:42,677 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:42,678 INFO L225 Difference]: With dead ends: 1001 [2022-01-18 15:16:42,678 INFO L226 Difference]: Without dead ends: 986 [2022-01-18 15:16:42,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:42,678 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 96 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:42,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 145 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 400 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2022-01-18 15:16:42,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2022-01-18 15:16:42,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 749. [2022-01-18 15:16:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.3302139037433154) internal successors, (2491), 748 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:42,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2491 transitions. [2022-01-18 15:16:42,687 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2491 transitions. Word has length 21 [2022-01-18 15:16:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:42,687 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2491 transitions. [2022-01-18 15:16:42,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2491 transitions. [2022-01-18 15:16:42,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:42,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:42,688 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:42,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:42,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2022-01-18 15:16:42,907 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:42,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash -279521967, now seen corresponding path program 437 times [2022-01-18 15:16:42,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:42,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33030232] [2022-01-18 15:16:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:42,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:43,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:43,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33030232] [2022-01-18 15:16:43,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33030232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:43,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042294180] [2022-01-18 15:16:43,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:43,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:43,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:43,055 INFO L229 MonitoredProcess]: Starting monitored process 438 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:43,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Waiting until timeout for monitored process [2022-01-18 15:16:43,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:16:43,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:43,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:43,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:43,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:43,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:43,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:43,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:43,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:43,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:16:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:43,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:43,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:43,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:43,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:43,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:43,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:43,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:43,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042294180] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:43,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:43,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:43,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320959747] [2022-01-18 15:16:43,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:43,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:43,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:43,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:43,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:43,520 INFO L87 Difference]: Start difference. First operand 749 states and 2491 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:43,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:43,888 INFO L93 Difference]: Finished difference Result 1029 states and 3327 transitions. [2022-01-18 15:16:43,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:16:43,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:43,890 INFO L225 Difference]: With dead ends: 1029 [2022-01-18 15:16:43,890 INFO L226 Difference]: Without dead ends: 1008 [2022-01-18 15:16:43,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:16:43,890 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:43,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 152 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 530 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-01-18 15:16:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-01-18 15:16:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 749. [2022-01-18 15:16:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.3302139037433154) internal successors, (2491), 748 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:43,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2491 transitions. [2022-01-18 15:16:43,902 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2491 transitions. Word has length 21 [2022-01-18 15:16:43,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:43,902 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2491 transitions. [2022-01-18 15:16:43,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2491 transitions. [2022-01-18 15:16:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:43,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:43,903 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:43,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:44,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,438 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:44,103 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:44,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1794179582, now seen corresponding path program 438 times [2022-01-18 15:16:44,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:44,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955573447] [2022-01-18 15:16:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:44,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:44,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:44,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955573447] [2022-01-18 15:16:44,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955573447] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:44,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400638098] [2022-01-18 15:16:44,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:44,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:44,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:44,227 INFO L229 MonitoredProcess]: Starting monitored process 439 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:44,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Waiting until timeout for monitored process [2022-01-18 15:16:44,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:16:44,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:44,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:44,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:44,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:44,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:44,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:44,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:44,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:44,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:44,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:44,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:44,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:44,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:44,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:16:44,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:44,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:44,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400638098] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:44,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:44,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:44,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512031847] [2022-01-18 15:16:44,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:44,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:44,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:44,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:44,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:44,685 INFO L87 Difference]: Start difference. First operand 749 states and 2491 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:44,972 INFO L93 Difference]: Finished difference Result 969 states and 3138 transitions. [2022-01-18 15:16:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:16:44,972 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:44,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:44,973 INFO L225 Difference]: With dead ends: 969 [2022-01-18 15:16:44,973 INFO L226 Difference]: Without dead ends: 946 [2022-01-18 15:16:44,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:44,974 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:44,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 195 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 620 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-18 15:16:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-01-18 15:16:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 752. [2022-01-18 15:16:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.33422103861518) internal successors, (2504), 751 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2504 transitions. [2022-01-18 15:16:44,982 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2504 transitions. Word has length 21 [2022-01-18 15:16:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:44,982 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2504 transitions. [2022-01-18 15:16:44,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2504 transitions. [2022-01-18 15:16:44,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:44,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:44,983 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:44,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Ended with exit code 0 [2022-01-18 15:16:45,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,439 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:45,185 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:45,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:45,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1190938585, now seen corresponding path program 439 times [2022-01-18 15:16:45,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:45,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110302243] [2022-01-18 15:16:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:45,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:45,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:45,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110302243] [2022-01-18 15:16:45,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110302243] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:45,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330552663] [2022-01-18 15:16:45,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:45,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:45,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:45,293 INFO L229 MonitoredProcess]: Starting monitored process 440 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:45,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Waiting until timeout for monitored process [2022-01-18 15:16:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:45,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:45,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:45,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:45,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:45,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:45,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:45,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:45,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:45,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:45,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:45,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:45,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:45,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:45,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:45,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:45,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330552663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:45,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:45,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:45,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17942493] [2022-01-18 15:16:45,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:45,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:45,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:45,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:45,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:45,753 INFO L87 Difference]: Start difference. First operand 752 states and 2504 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:46,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:46,113 INFO L93 Difference]: Finished difference Result 1008 states and 3257 transitions. [2022-01-18 15:16:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:46,113 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:46,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:46,115 INFO L225 Difference]: With dead ends: 1008 [2022-01-18 15:16:46,115 INFO L226 Difference]: Without dead ends: 981 [2022-01-18 15:16:46,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:16:46,115 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:46,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 193 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 615 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-01-18 15:16:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-01-18 15:16:46,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 753. [2022-01-18 15:16:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.336436170212766) internal successors, (2509), 752 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2509 transitions. [2022-01-18 15:16:46,124 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2509 transitions. Word has length 21 [2022-01-18 15:16:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:46,124 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2509 transitions. [2022-01-18 15:16:46,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2509 transitions. [2022-01-18 15:16:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:46,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:46,125 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:46,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:46,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,440 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:46,325 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:46,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:46,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1560136279, now seen corresponding path program 440 times [2022-01-18 15:16:46,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:46,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503703074] [2022-01-18 15:16:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:46,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:46,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:46,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503703074] [2022-01-18 15:16:46,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503703074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:46,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610330043] [2022-01-18 15:16:46,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:46,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:46,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:46,425 INFO L229 MonitoredProcess]: Starting monitored process 441 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:46,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Waiting until timeout for monitored process [2022-01-18 15:16:46,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:46,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:46,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:46,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:46,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:46,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:16:46,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:46,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:46,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:46,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:46,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:46,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:46,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:46,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:46,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:46,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610330043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:46,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:46,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:16:46,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244007582] [2022-01-18 15:16:46,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:46,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:46,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:46,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:46,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:46,799 INFO L87 Difference]: Start difference. First operand 753 states and 2509 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:46,962 INFO L93 Difference]: Finished difference Result 864 states and 2833 transitions. [2022-01-18 15:16:46,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:16:46,962 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:46,963 INFO L225 Difference]: With dead ends: 864 [2022-01-18 15:16:46,963 INFO L226 Difference]: Without dead ends: 821 [2022-01-18 15:16:46,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:46,963 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:46,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 119 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 405 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-01-18 15:16:46,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-01-18 15:16:46,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 750. [2022-01-18 15:16:46,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.3324432576769025) internal successors, (2496), 749 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2496 transitions. [2022-01-18 15:16:46,971 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2496 transitions. Word has length 21 [2022-01-18 15:16:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:46,971 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2496 transitions. [2022-01-18 15:16:46,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2496 transitions. [2022-01-18 15:16:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:46,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:46,972 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:46,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Ended with exit code 0 [2022-01-18 15:16:47,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,441 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:47,173 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:47,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1690669428, now seen corresponding path program 441 times [2022-01-18 15:16:47,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:47,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774632388] [2022-01-18 15:16:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:47,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:47,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:47,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774632388] [2022-01-18 15:16:47,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774632388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:47,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767819957] [2022-01-18 15:16:47,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:47,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:47,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:47,275 INFO L229 MonitoredProcess]: Starting monitored process 442 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:47,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Waiting until timeout for monitored process [2022-01-18 15:16:47,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:16:47,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:47,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:47,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:47,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:47,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:47,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:47,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:47,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:47,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:16:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:47,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:47,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:47,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:47,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:47,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:47,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:47,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:47,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767819957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:47,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:47,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:16:47,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501238069] [2022-01-18 15:16:47,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:47,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:47,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:47,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:47,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:47,705 INFO L87 Difference]: Start difference. First operand 750 states and 2496 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:47,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:47,923 INFO L93 Difference]: Finished difference Result 909 states and 2961 transitions. [2022-01-18 15:16:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:47,924 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:47,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:47,925 INFO L225 Difference]: With dead ends: 909 [2022-01-18 15:16:47,925 INFO L226 Difference]: Without dead ends: 890 [2022-01-18 15:16:47,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:47,925 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 64 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:47,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 162 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 496 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-01-18 15:16:47,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-01-18 15:16:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 754. [2022-01-18 15:16:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3359893758300134) internal successors, (2512), 753 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2512 transitions. [2022-01-18 15:16:47,934 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2512 transitions. Word has length 21 [2022-01-18 15:16:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:47,934 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2512 transitions. [2022-01-18 15:16:47,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2512 transitions. [2022-01-18 15:16:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:47,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:47,935 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:47,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Ended with exit code 0 [2022-01-18 15:16:48,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 442 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2022-01-18 15:16:48,135 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:48,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1349365876, now seen corresponding path program 442 times [2022-01-18 15:16:48,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:48,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972364750] [2022-01-18 15:16:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:48,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:48,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:48,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972364750] [2022-01-18 15:16:48,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972364750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:48,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293136646] [2022-01-18 15:16:48,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:48,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:48,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:48,251 INFO L229 MonitoredProcess]: Starting monitored process 443 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:48,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Waiting until timeout for monitored process [2022-01-18 15:16:48,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:48,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:48,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:48,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:48,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:48,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:48,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:48,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:48,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:48,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:16:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:48,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:48,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:48,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:48,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:48,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:16:48,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:48,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:48,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293136646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:48,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:48,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:48,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385942527] [2022-01-18 15:16:48,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:48,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:48,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:48,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:48,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:48,733 INFO L87 Difference]: Start difference. First operand 754 states and 2512 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:48,967 INFO L93 Difference]: Finished difference Result 1011 states and 3209 transitions. [2022-01-18 15:16:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:16:48,967 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:48,968 INFO L225 Difference]: With dead ends: 1011 [2022-01-18 15:16:48,969 INFO L226 Difference]: Without dead ends: 973 [2022-01-18 15:16:48,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:48,969 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:48,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 184 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 438 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-01-18 15:16:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-01-18 15:16:48,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 762. [2022-01-18 15:16:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.328515111695138) internal successors, (2533), 761 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:48,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2533 transitions. [2022-01-18 15:16:48,977 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2533 transitions. Word has length 21 [2022-01-18 15:16:48,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:48,977 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 2533 transitions. [2022-01-18 15:16:48,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:48,978 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2533 transitions. [2022-01-18 15:16:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:48,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:48,978 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:48,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Ended with exit code 0 [2022-01-18 15:16:49,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,443 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:49,179 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:49,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:49,179 INFO L85 PathProgramCache]: Analyzing trace with hash 673983948, now seen corresponding path program 443 times [2022-01-18 15:16:49,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:49,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450882281] [2022-01-18 15:16:49,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:49,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:49,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:49,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450882281] [2022-01-18 15:16:49,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450882281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:49,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221706875] [2022-01-18 15:16:49,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:49,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:49,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:49,289 INFO L229 MonitoredProcess]: Starting monitored process 444 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:49,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Waiting until timeout for monitored process [2022-01-18 15:16:49,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:16:49,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:49,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:49,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:49,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:49,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:49,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:49,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:49,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:49,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:16:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:49,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:49,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:49,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:49,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:49,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:16:49,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:49,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:49,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221706875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:49,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:49,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:49,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27965445] [2022-01-18 15:16:49,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:49,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:49,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:49,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:49,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:49,793 INFO L87 Difference]: Start difference. First operand 762 states and 2533 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:50,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:50,076 INFO L93 Difference]: Finished difference Result 952 states and 3059 transitions. [2022-01-18 15:16:50,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:16:50,076 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:50,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:50,078 INFO L225 Difference]: With dead ends: 952 [2022-01-18 15:16:50,078 INFO L226 Difference]: Without dead ends: 949 [2022-01-18 15:16:50,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:50,078 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 76 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:50,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 228 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 603 Invalid, 0 Unknown, 229 Unchecked, 0.2s Time] [2022-01-18 15:16:50,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-01-18 15:16:50,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 750. [2022-01-18 15:16:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.3324432576769025) internal successors, (2496), 749 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2496 transitions. [2022-01-18 15:16:50,086 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2496 transitions. Word has length 21 [2022-01-18 15:16:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:50,087 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2496 transitions. [2022-01-18 15:16:50,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2496 transitions. [2022-01-18 15:16:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:50,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:50,087 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:50,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Ended with exit code 0 [2022-01-18 15:16:50,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2022-01-18 15:16:50,288 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:50,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:50,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1184317933, now seen corresponding path program 444 times [2022-01-18 15:16:50,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:50,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580801031] [2022-01-18 15:16:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:50,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:50,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:50,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580801031] [2022-01-18 15:16:50,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580801031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:50,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372822662] [2022-01-18 15:16:50,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:50,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:50,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:50,394 INFO L229 MonitoredProcess]: Starting monitored process 445 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:50,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Waiting until timeout for monitored process [2022-01-18 15:16:50,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:16:50,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:50,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:50,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:50,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:50,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:50,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:50,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:50,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:50,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:50,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:50,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:50,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:50,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:50,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:50,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:50,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:50,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372822662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:50,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:50,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:16:50,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230031269] [2022-01-18 15:16:50,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:50,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:50,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:50,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:50,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:50,907 INFO L87 Difference]: Start difference. First operand 750 states and 2496 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:51,262 INFO L93 Difference]: Finished difference Result 1051 states and 3342 transitions. [2022-01-18 15:16:51,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:16:51,263 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:51,264 INFO L225 Difference]: With dead ends: 1051 [2022-01-18 15:16:51,264 INFO L226 Difference]: Without dead ends: 1024 [2022-01-18 15:16:51,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:16:51,265 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 85 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:51,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 187 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 526 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 15:16:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-01-18 15:16:51,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 755. [2022-01-18 15:16:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.3355437665782492) internal successors, (2515), 754 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2515 transitions. [2022-01-18 15:16:51,274 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2515 transitions. Word has length 21 [2022-01-18 15:16:51,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:51,274 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2515 transitions. [2022-01-18 15:16:51,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2515 transitions. [2022-01-18 15:16:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:51,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:51,275 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:51,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Ended with exit code 0 [2022-01-18 15:16:51,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2022-01-18 15:16:51,475 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:51,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:51,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2088624621, now seen corresponding path program 445 times [2022-01-18 15:16:51,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:51,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053525362] [2022-01-18 15:16:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:51,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:51,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:51,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053525362] [2022-01-18 15:16:51,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053525362] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:51,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450116087] [2022-01-18 15:16:51,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:51,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:51,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:51,574 INFO L229 MonitoredProcess]: Starting monitored process 446 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:51,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Waiting until timeout for monitored process [2022-01-18 15:16:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:51,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:51,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:51,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:51,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:51,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:51,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:16:51,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:51,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:51,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:51,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:51,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:51,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:51,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:51,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:51,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:51,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450116087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:51,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:51,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:16:51,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915824512] [2022-01-18 15:16:51,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:51,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:51,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:51,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:51,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:51,973 INFO L87 Difference]: Start difference. First operand 755 states and 2515 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:52,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:52,164 INFO L93 Difference]: Finished difference Result 881 states and 2848 transitions. [2022-01-18 15:16:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:52,164 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:52,166 INFO L225 Difference]: With dead ends: 881 [2022-01-18 15:16:52,166 INFO L226 Difference]: Without dead ends: 824 [2022-01-18 15:16:52,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:52,166 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 54 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:52,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 178 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 507 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-01-18 15:16:52,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-01-18 15:16:52,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 750. [2022-01-18 15:16:52,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.3337783711615487) internal successors, (2497), 749 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2497 transitions. [2022-01-18 15:16:52,174 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2497 transitions. Word has length 21 [2022-01-18 15:16:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:52,174 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2497 transitions. [2022-01-18 15:16:52,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:52,174 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2497 transitions. [2022-01-18 15:16:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:52,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:52,175 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:52,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Ended with exit code 0 [2022-01-18 15:16:52,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2022-01-18 15:16:52,375 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:52,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:52,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1841328145, now seen corresponding path program 446 times [2022-01-18 15:16:52,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:52,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594472250] [2022-01-18 15:16:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:52,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:52,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:52,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594472250] [2022-01-18 15:16:52,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594472250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:52,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347031686] [2022-01-18 15:16:52,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:52,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:52,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:52,478 INFO L229 MonitoredProcess]: Starting monitored process 447 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:52,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Waiting until timeout for monitored process [2022-01-18 15:16:52,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:52,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:52,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:52,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:52,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:52,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:52,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:52,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:52,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:52,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:52,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:52,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:52,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:53,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:53,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:53,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:53,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:53,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347031686] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:53,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:53,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:16:53,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66395579] [2022-01-18 15:16:53,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:53,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:53,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:53,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:53,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:53,104 INFO L87 Difference]: Start difference. First operand 750 states and 2497 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:53,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:53,553 INFO L93 Difference]: Finished difference Result 1029 states and 3270 transitions. [2022-01-18 15:16:53,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:16:53,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:53,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:53,555 INFO L225 Difference]: With dead ends: 1029 [2022-01-18 15:16:53,555 INFO L226 Difference]: Without dead ends: 1018 [2022-01-18 15:16:53,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:16:53,555 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 81 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:53,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 250 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 724 Invalid, 0 Unknown, 31 Unchecked, 0.3s Time] [2022-01-18 15:16:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-01-18 15:16:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 751. [2022-01-18 15:16:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.3333333333333335) internal successors, (2500), 750 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2500 transitions. [2022-01-18 15:16:53,572 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2500 transitions. Word has length 21 [2022-01-18 15:16:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:53,572 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2500 transitions. [2022-01-18 15:16:53,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2500 transitions. [2022-01-18 15:16:53,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:53,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:53,573 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:53,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Ended with exit code 0 [2022-01-18 15:16:53,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,447 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:53,773 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:53,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1771825437, now seen corresponding path program 447 times [2022-01-18 15:16:53,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:53,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095932583] [2022-01-18 15:16:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:53,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:53,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:53,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095932583] [2022-01-18 15:16:53,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095932583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:53,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348966630] [2022-01-18 15:16:53,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:53,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:53,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:53,890 INFO L229 MonitoredProcess]: Starting monitored process 448 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:53,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Waiting until timeout for monitored process [2022-01-18 15:16:53,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:16:53,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:53,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:53,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:53,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:54,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:54,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:54,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:54,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:16:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:54,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:54,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:54,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:16:54,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:54,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:54,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:54,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:54,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348966630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:54,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:54,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:54,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169726284] [2022-01-18 15:16:54,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:54,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:54,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:54,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:54,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:54,418 INFO L87 Difference]: Start difference. First operand 751 states and 2500 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:54,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:54,709 INFO L93 Difference]: Finished difference Result 1038 states and 3304 transitions. [2022-01-18 15:16:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:16:54,709 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:54,710 INFO L225 Difference]: With dead ends: 1038 [2022-01-18 15:16:54,710 INFO L226 Difference]: Without dead ends: 996 [2022-01-18 15:16:54,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:16:54,711 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:54,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 231 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 625 Invalid, 0 Unknown, 289 Unchecked, 0.2s Time] [2022-01-18 15:16:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-01-18 15:16:54,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 757. [2022-01-18 15:16:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.3373015873015874) internal successors, (2523), 756 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2523 transitions. [2022-01-18 15:16:54,720 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2523 transitions. Word has length 21 [2022-01-18 15:16:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:54,720 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2523 transitions. [2022-01-18 15:16:54,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2523 transitions. [2022-01-18 15:16:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:54,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:54,721 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:54,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Ended with exit code 0 [2022-01-18 15:16:54,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2022-01-18 15:16:54,921 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:54,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1439855604, now seen corresponding path program 448 times [2022-01-18 15:16:54,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:54,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287889382] [2022-01-18 15:16:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:54,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:55,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287889382] [2022-01-18 15:16:55,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287889382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765443744] [2022-01-18 15:16:55,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:16:55,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:55,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:55,024 INFO L229 MonitoredProcess]: Starting monitored process 449 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:55,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Waiting until timeout for monitored process [2022-01-18 15:16:55,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:16:55,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:55,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:55,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:55,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:55,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:55,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:55,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:16:55,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:55,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:16:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:55,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:55,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:55,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:55,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:55,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:55,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:55,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:16:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:55,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765443744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:55,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:55,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:16:55,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424296463] [2022-01-18 15:16:55,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:55,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:16:55,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:55,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:16:55,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:55,491 INFO L87 Difference]: Start difference. First operand 757 states and 2523 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:55,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:55,709 INFO L93 Difference]: Finished difference Result 969 states and 3130 transitions. [2022-01-18 15:16:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:16:55,710 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:55,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:55,711 INFO L225 Difference]: With dead ends: 969 [2022-01-18 15:16:55,711 INFO L226 Difference]: Without dead ends: 946 [2022-01-18 15:16:55,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:16:55,711 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:55,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 160 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 398 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-01-18 15:16:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-01-18 15:16:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 761. [2022-01-18 15:16:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.338157894736842) internal successors, (2537), 760 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2537 transitions. [2022-01-18 15:16:55,720 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2537 transitions. Word has length 21 [2022-01-18 15:16:55,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:55,720 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2537 transitions. [2022-01-18 15:16:55,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2537 transitions. [2022-01-18 15:16:55,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:55,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:55,721 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:55,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Ended with exit code 0 [2022-01-18 15:16:55,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 449 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2022-01-18 15:16:55,922 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:55,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:55,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1739183251, now seen corresponding path program 449 times [2022-01-18 15:16:55,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:55,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615963248] [2022-01-18 15:16:55,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:55,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:56,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615963248] [2022-01-18 15:16:56,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615963248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639906895] [2022-01-18 15:16:56,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:16:56,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:56,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:56,022 INFO L229 MonitoredProcess]: Starting monitored process 450 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:56,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Waiting until timeout for monitored process [2022-01-18 15:16:56,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:56,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:56,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:56,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:56,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:56,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:56,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:56,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:16:56,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:56,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:56,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:56,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:56,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:56,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:56,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:56,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:56,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:56,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639906895] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:56,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:56,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:16:56,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606331270] [2022-01-18 15:16:56,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:56,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:56,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:56,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:56,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:56,414 INFO L87 Difference]: Start difference. First operand 761 states and 2537 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:56,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:56,592 INFO L93 Difference]: Finished difference Result 869 states and 2823 transitions. [2022-01-18 15:16:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:16:56,592 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:56,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:56,593 INFO L225 Difference]: With dead ends: 869 [2022-01-18 15:16:56,593 INFO L226 Difference]: Without dead ends: 826 [2022-01-18 15:16:56,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:16:56,593 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:56,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 179 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 455 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-01-18 15:16:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-01-18 15:16:56,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 759. [2022-01-18 15:16:56,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.337730870712401) internal successors, (2530), 758 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:56,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2530 transitions. [2022-01-18 15:16:56,601 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2530 transitions. Word has length 21 [2022-01-18 15:16:56,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:56,602 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2530 transitions. [2022-01-18 15:16:56,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:56,602 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2530 transitions. [2022-01-18 15:16:56,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:56,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:56,603 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:56,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Ended with exit code 0 [2022-01-18 15:16:56,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,450 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:56,803 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:56,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2020488662, now seen corresponding path program 450 times [2022-01-18 15:16:56,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:56,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720181122] [2022-01-18 15:16:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:56,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:56,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:56,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720181122] [2022-01-18 15:16:56,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720181122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:56,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630469184] [2022-01-18 15:16:56,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:16:56,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:56,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:56,913 INFO L229 MonitoredProcess]: Starting monitored process 451 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:56,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Waiting until timeout for monitored process [2022-01-18 15:16:56,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:16:56,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:56,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:56,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:57,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:57,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:57,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:57,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:57,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:57,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:16:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:57,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:57,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:57,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:16:57,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:57,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:16:57,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:57,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:16:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:57,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630469184] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:57,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:57,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:57,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66426647] [2022-01-18 15:16:57,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:57,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:57,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:57,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:57,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:57,376 INFO L87 Difference]: Start difference. First operand 759 states and 2530 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:57,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:57,638 INFO L93 Difference]: Finished difference Result 1012 states and 3220 transitions. [2022-01-18 15:16:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:16:57,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:57,639 INFO L225 Difference]: With dead ends: 1012 [2022-01-18 15:16:57,640 INFO L226 Difference]: Without dead ends: 993 [2022-01-18 15:16:57,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:16:57,640 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:57,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 204 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 517 Invalid, 0 Unknown, 182 Unchecked, 0.2s Time] [2022-01-18 15:16:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-01-18 15:16:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 759. [2022-01-18 15:16:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.337730870712401) internal successors, (2530), 758 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2530 transitions. [2022-01-18 15:16:57,649 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2530 transitions. Word has length 21 [2022-01-18 15:16:57,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:57,649 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2530 transitions. [2022-01-18 15:16:57,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:57,649 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2530 transitions. [2022-01-18 15:16:57,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:57,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:57,650 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:57,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Ended with exit code 0 [2022-01-18 15:16:57,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,451 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:57,850 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:57,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:57,850 INFO L85 PathProgramCache]: Analyzing trace with hash 32413309, now seen corresponding path program 451 times [2022-01-18 15:16:57,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:57,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416035830] [2022-01-18 15:16:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:57,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:57,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:57,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416035830] [2022-01-18 15:16:57,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416035830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:57,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746455322] [2022-01-18 15:16:57,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:16:57,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:57,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:57,959 INFO L229 MonitoredProcess]: Starting monitored process 452 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:57,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Waiting until timeout for monitored process [2022-01-18 15:16:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:57,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:57,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:58,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:58,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:58,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:58,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:16:58,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:58,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:16:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:58,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:58,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:58,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:58,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:58,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:58,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:58,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:16:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:58,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746455322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:58,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:58,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:16:58,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977222960] [2022-01-18 15:16:58,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:58,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:16:58,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:58,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:16:58,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:58,356 INFO L87 Difference]: Start difference. First operand 759 states and 2530 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:58,539 INFO L93 Difference]: Finished difference Result 912 states and 2900 transitions. [2022-01-18 15:16:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:16:58,539 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:58,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:58,548 INFO L225 Difference]: With dead ends: 912 [2022-01-18 15:16:58,548 INFO L226 Difference]: Without dead ends: 830 [2022-01-18 15:16:58,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:16:58,548 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 53 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:58,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 190 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 498 Invalid, 0 Unknown, 123 Unchecked, 0.2s Time] [2022-01-18 15:16:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-01-18 15:16:58,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 760. [2022-01-18 15:16:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.3280632411067192) internal successors, (2526), 759 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:58,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2526 transitions. [2022-01-18 15:16:58,556 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2526 transitions. Word has length 21 [2022-01-18 15:16:58,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:58,556 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2526 transitions. [2022-01-18 15:16:58,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2526 transitions. [2022-01-18 15:16:58,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:58,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:58,557 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:58,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Ended with exit code 0 [2022-01-18 15:16:58,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,452 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:58,758 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:58,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:58,758 INFO L85 PathProgramCache]: Analyzing trace with hash -386524251, now seen corresponding path program 452 times [2022-01-18 15:16:58,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:58,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087552929] [2022-01-18 15:16:58,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:58,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:58,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:58,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087552929] [2022-01-18 15:16:58,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087552929] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:58,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875029148] [2022-01-18 15:16:58,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:16:58,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:58,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:58,868 INFO L229 MonitoredProcess]: Starting monitored process 453 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:58,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Waiting until timeout for monitored process [2022-01-18 15:16:58,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:16:58,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:16:58,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:16:58,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:16:58,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:58,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:59,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:59,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:16:59,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:16:59,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:16:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:59,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:16:59,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:59,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:16:59,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:59,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:16:59,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:16:59,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:16:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:59,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875029148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:16:59,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:16:59,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:16:59,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725098939] [2022-01-18 15:16:59,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:16:59,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:16:59,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:16:59,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:16:59,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:16:59,339 INFO L87 Difference]: Start difference. First operand 760 states and 2526 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:16:59,643 INFO L93 Difference]: Finished difference Result 962 states and 3111 transitions. [2022-01-18 15:16:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:16:59,643 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:16:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:16:59,645 INFO L225 Difference]: With dead ends: 962 [2022-01-18 15:16:59,645 INFO L226 Difference]: Without dead ends: 941 [2022-01-18 15:16:59,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:16:59,645 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:16:59,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 209 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 677 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-18 15:16:59,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-18 15:16:59,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 760. [2022-01-18 15:16:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.3280632411067192) internal successors, (2526), 759 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:59,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2526 transitions. [2022-01-18 15:16:59,654 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2526 transitions. Word has length 21 [2022-01-18 15:16:59,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:16:59,654 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2526 transitions. [2022-01-18 15:16:59,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:16:59,654 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2526 transitions. [2022-01-18 15:16:59,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:16:59,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:16:59,655 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:16:59,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Forceful destruction successful, exit code 0 [2022-01-18 15:16:59,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,453 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:59,855 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:16:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:16:59,855 INFO L85 PathProgramCache]: Analyzing trace with hash -704564761, now seen corresponding path program 453 times [2022-01-18 15:16:59,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:16:59,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899067160] [2022-01-18 15:16:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:16:59,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:16:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:16:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:16:59,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:16:59,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899067160] [2022-01-18 15:16:59,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899067160] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:16:59,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236408102] [2022-01-18 15:16:59,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:16:59,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:16:59,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:16:59,980 INFO L229 MonitoredProcess]: Starting monitored process 454 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:16:59,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Waiting until timeout for monitored process [2022-01-18 15:17:00,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:17:00,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:00,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:00,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:00,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:00,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:00,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:00,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:00,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:00,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:00,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:00,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:00,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:17:00,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:00,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:17:00,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:00,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:17:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:00,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236408102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:00,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:00,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:00,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485798530] [2022-01-18 15:17:00,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:00,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:00,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:00,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:00,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:00,466 INFO L87 Difference]: Start difference. First operand 760 states and 2526 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:00,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:00,714 INFO L93 Difference]: Finished difference Result 955 states and 3086 transitions. [2022-01-18 15:17:00,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:17:00,715 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:00,716 INFO L225 Difference]: With dead ends: 955 [2022-01-18 15:17:00,716 INFO L226 Difference]: Without dead ends: 946 [2022-01-18 15:17:00,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:17:00,716 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:00,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 165 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 510 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-01-18 15:17:00,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-01-18 15:17:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 760. [2022-01-18 15:17:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.3280632411067192) internal successors, (2526), 759 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2526 transitions. [2022-01-18 15:17:00,725 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2526 transitions. Word has length 21 [2022-01-18 15:17:00,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:00,725 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2526 transitions. [2022-01-18 15:17:00,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:00,725 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2526 transitions. [2022-01-18 15:17:00,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:00,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:00,726 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:00,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Ended with exit code 0 [2022-01-18 15:17:00,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2022-01-18 15:17:00,926 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:00,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:00,927 INFO L85 PathProgramCache]: Analyzing trace with hash -117649159, now seen corresponding path program 454 times [2022-01-18 15:17:00,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:00,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165486181] [2022-01-18 15:17:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:00,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:01,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:01,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165486181] [2022-01-18 15:17:01,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165486181] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:01,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153765941] [2022-01-18 15:17:01,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:01,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:01,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:01,043 INFO L229 MonitoredProcess]: Starting monitored process 455 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:01,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Waiting until timeout for monitored process [2022-01-18 15:17:01,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:01,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:01,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:01,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:01,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:01,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:01,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:01,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:01,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:01,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:01,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:01,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:01,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:17:01,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:01,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:17:01,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:01,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:17:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:01,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153765941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:01,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:01,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:01,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510524795] [2022-01-18 15:17:01,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:01,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:01,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:01,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:01,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:01,547 INFO L87 Difference]: Start difference. First operand 760 states and 2526 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:01,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:01,797 INFO L93 Difference]: Finished difference Result 1004 states and 3195 transitions. [2022-01-18 15:17:01,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:17:01,797 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:01,799 INFO L225 Difference]: With dead ends: 1004 [2022-01-18 15:17:01,799 INFO L226 Difference]: Without dead ends: 974 [2022-01-18 15:17:01,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:17:01,799 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:01,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 167 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 500 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 15:17:01,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-01-18 15:17:01,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 766. [2022-01-18 15:17:01,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.320261437908497) internal successors, (2540), 765 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2540 transitions. [2022-01-18 15:17:01,808 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2540 transitions. Word has length 21 [2022-01-18 15:17:01,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:01,808 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 2540 transitions. [2022-01-18 15:17:01,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:01,808 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2540 transitions. [2022-01-18 15:17:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:01,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:01,809 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:01,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:02,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2022-01-18 15:17:02,021 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:02,021 INFO L85 PathProgramCache]: Analyzing trace with hash -793031087, now seen corresponding path program 455 times [2022-01-18 15:17:02,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:02,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317044084] [2022-01-18 15:17:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:02,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:02,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:02,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317044084] [2022-01-18 15:17:02,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317044084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:02,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385788390] [2022-01-18 15:17:02,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:02,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:02,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:02,133 INFO L229 MonitoredProcess]: Starting monitored process 456 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:02,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Waiting until timeout for monitored process [2022-01-18 15:17:02,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:17:02,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:02,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:02,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:02,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:02,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:02,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:02,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:02,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:02,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:02,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:02,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:02,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:17:02,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:02,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:17:02,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:02,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:17:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:02,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385788390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:02,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:02,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:02,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357043224] [2022-01-18 15:17:02,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:02,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:02,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:02,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:02,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:02,656 INFO L87 Difference]: Start difference. First operand 766 states and 2540 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:02,888 INFO L93 Difference]: Finished difference Result 971 states and 3114 transitions. [2022-01-18 15:17:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:17:02,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:02,889 INFO L225 Difference]: With dead ends: 971 [2022-01-18 15:17:02,889 INFO L226 Difference]: Without dead ends: 965 [2022-01-18 15:17:02,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:17:02,889 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:02,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 199 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 449 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-01-18 15:17:02,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-01-18 15:17:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 754. [2022-01-18 15:17:02,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3240371845949537) internal successors, (2503), 753 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2503 transitions. [2022-01-18 15:17:02,898 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2503 transitions. Word has length 21 [2022-01-18 15:17:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:02,898 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2503 transitions. [2022-01-18 15:17:02,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2503 transitions. [2022-01-18 15:17:02,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:02,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:02,899 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:02,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Ended with exit code 0 [2022-01-18 15:17:03,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2022-01-18 15:17:03,100 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:03,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:03,100 INFO L85 PathProgramCache]: Analyzing trace with hash -27005411, now seen corresponding path program 456 times [2022-01-18 15:17:03,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:03,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259475367] [2022-01-18 15:17:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:03,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:03,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:03,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259475367] [2022-01-18 15:17:03,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259475367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:03,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132499218] [2022-01-18 15:17:03,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:03,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:03,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:03,199 INFO L229 MonitoredProcess]: Starting monitored process 457 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:03,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Waiting until timeout for monitored process [2022-01-18 15:17:03,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:17:03,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:03,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:03,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:03,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:03,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:03,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:03,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:03,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:03,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:03,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:03,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:03,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:03,601 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:03,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:17:03,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:03,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:17:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:03,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132499218] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:03,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:03,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:17:03,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691214695] [2022-01-18 15:17:03,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:03,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:03,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:03,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:03,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:03,649 INFO L87 Difference]: Start difference. First operand 754 states and 2503 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:04,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:04,026 INFO L93 Difference]: Finished difference Result 1008 states and 3265 transitions. [2022-01-18 15:17:04,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:17:04,026 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:04,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:04,028 INFO L225 Difference]: With dead ends: 1008 [2022-01-18 15:17:04,028 INFO L226 Difference]: Without dead ends: 981 [2022-01-18 15:17:04,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:17:04,028 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:04,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 217 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 704 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-01-18 15:17:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-01-18 15:17:04,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 754. [2022-01-18 15:17:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3213811420982737) internal successors, (2501), 753 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2501 transitions. [2022-01-18 15:17:04,037 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2501 transitions. Word has length 21 [2022-01-18 15:17:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:04,037 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2501 transitions. [2022-01-18 15:17:04,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2501 transitions. [2022-01-18 15:17:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:04,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:04,038 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:04,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Ended with exit code 0 [2022-01-18 15:17:04,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,457 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:04,238 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:04,239 INFO L85 PathProgramCache]: Analyzing trace with hash 569100505, now seen corresponding path program 457 times [2022-01-18 15:17:04,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:04,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98840389] [2022-01-18 15:17:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:04,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:04,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:04,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98840389] [2022-01-18 15:17:04,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98840389] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:04,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098066874] [2022-01-18 15:17:04,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:04,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:04,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:04,360 INFO L229 MonitoredProcess]: Starting monitored process 458 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:04,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Waiting until timeout for monitored process [2022-01-18 15:17:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:04,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:04,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:04,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:04,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:04,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:04,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:04,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:04,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:04,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:04,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:04,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:04,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:04,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:17:04,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:04,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:17:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:04,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098066874] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:04,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:04,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:04,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274953781] [2022-01-18 15:17:04,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:04,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:04,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:04,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:04,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:04,783 INFO L87 Difference]: Start difference. First operand 754 states and 2501 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:05,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:05,089 INFO L93 Difference]: Finished difference Result 1017 states and 3279 transitions. [2022-01-18 15:17:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:17:05,089 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:05,091 INFO L225 Difference]: With dead ends: 1017 [2022-01-18 15:17:05,091 INFO L226 Difference]: Without dead ends: 996 [2022-01-18 15:17:05,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:05,091 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 97 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:05,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 126 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 438 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2022-01-18 15:17:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-01-18 15:17:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 754. [2022-01-18 15:17:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3213811420982737) internal successors, (2501), 753 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2501 transitions. [2022-01-18 15:17:05,099 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2501 transitions. Word has length 21 [2022-01-18 15:17:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:05,100 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2501 transitions. [2022-01-18 15:17:05,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2501 transitions. [2022-01-18 15:17:05,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:05,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:05,101 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:05,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Ended with exit code 0 [2022-01-18 15:17:05,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2022-01-18 15:17:05,301 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:05,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:05,301 INFO L85 PathProgramCache]: Analyzing trace with hash 2083661693, now seen corresponding path program 458 times [2022-01-18 15:17:05,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:05,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310330831] [2022-01-18 15:17:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:05,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:05,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:05,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310330831] [2022-01-18 15:17:05,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310330831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:05,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799340390] [2022-01-18 15:17:05,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:05,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:05,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:05,419 INFO L229 MonitoredProcess]: Starting monitored process 459 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:05,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Waiting until timeout for monitored process [2022-01-18 15:17:05,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:05,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:05,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:05,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:05,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:05,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:05,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:05,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:05,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:05,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:05,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:05,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:05,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:05,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:05,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:17:05,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:05,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:17:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:05,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799340390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:05,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:05,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:05,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718981870] [2022-01-18 15:17:05,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:05,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:05,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:05,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:05,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:05,859 INFO L87 Difference]: Start difference. First operand 754 states and 2501 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:06,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:06,257 INFO L93 Difference]: Finished difference Result 1008 states and 3249 transitions. [2022-01-18 15:17:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:17:06,257 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:06,259 INFO L225 Difference]: With dead ends: 1008 [2022-01-18 15:17:06,259 INFO L226 Difference]: Without dead ends: 993 [2022-01-18 15:17:06,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:06,259 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:06,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 200 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 703 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2022-01-18 15:17:06,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-01-18 15:17:06,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 753. [2022-01-18 15:17:06,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.3191489361702127) internal successors, (2496), 752 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2496 transitions. [2022-01-18 15:17:06,268 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2496 transitions. Word has length 21 [2022-01-18 15:17:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:06,268 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2496 transitions. [2022-01-18 15:17:06,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:06,268 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2496 transitions. [2022-01-18 15:17:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:06,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:06,269 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:06,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Ended with exit code 0 [2022-01-18 15:17:06,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 459 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2022-01-18 15:17:06,469 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:06,469 INFO L85 PathProgramCache]: Analyzing trace with hash 76504743, now seen corresponding path program 459 times [2022-01-18 15:17:06,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:06,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542596324] [2022-01-18 15:17:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:06,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:06,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:06,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542596324] [2022-01-18 15:17:06,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542596324] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:06,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93747473] [2022-01-18 15:17:06,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:06,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:06,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:06,582 INFO L229 MonitoredProcess]: Starting monitored process 460 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:06,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Waiting until timeout for monitored process [2022-01-18 15:17:06,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:17:06,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:06,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:06,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:06,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:06,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:06,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:06,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:06,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:06,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:06,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:06,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:17:06,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:06,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:17:06,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:06,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:17:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:07,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93747473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:07,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:07,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:07,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032280012] [2022-01-18 15:17:07,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:07,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:07,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:07,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:07,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:07,009 INFO L87 Difference]: Start difference. First operand 753 states and 2496 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:07,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:07,316 INFO L93 Difference]: Finished difference Result 913 states and 2969 transitions. [2022-01-18 15:17:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:17:07,316 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:07,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:07,318 INFO L225 Difference]: With dead ends: 913 [2022-01-18 15:17:07,318 INFO L226 Difference]: Without dead ends: 892 [2022-01-18 15:17:07,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:17:07,318 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:07,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 166 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 607 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-01-18 15:17:07,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-01-18 15:17:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 754. [2022-01-18 15:17:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.316069057104914) internal successors, (2497), 753 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2497 transitions. [2022-01-18 15:17:07,327 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2497 transitions. Word has length 21 [2022-01-18 15:17:07,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:07,327 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2497 transitions. [2022-01-18 15:17:07,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:07,327 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2497 transitions. [2022-01-18 15:17:07,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:07,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:07,328 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:07,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:07,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,460 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:07,528 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:07,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:07,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1447302341, now seen corresponding path program 460 times [2022-01-18 15:17:07,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:07,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044348106] [2022-01-18 15:17:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:07,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:07,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:07,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044348106] [2022-01-18 15:17:07,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044348106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:07,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430881651] [2022-01-18 15:17:07,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:07,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:07,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:07,658 INFO L229 MonitoredProcess]: Starting monitored process 461 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:07,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Waiting until timeout for monitored process [2022-01-18 15:17:07,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:07,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:07,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:07,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:07,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:07,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:07,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:07,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:07,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:07,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:07,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:07,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:07,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:17:08,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:08,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:17:08,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:08,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:17:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:08,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430881651] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:08,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:08,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:08,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689632660] [2022-01-18 15:17:08,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:08,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:08,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:08,103 INFO L87 Difference]: Start difference. First operand 754 states and 2497 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:08,364 INFO L93 Difference]: Finished difference Result 975 states and 3116 transitions. [2022-01-18 15:17:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:17:08,364 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:08,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:08,366 INFO L225 Difference]: With dead ends: 975 [2022-01-18 15:17:08,366 INFO L226 Difference]: Without dead ends: 954 [2022-01-18 15:17:08,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:17:08,366 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 79 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:08,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 139 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 472 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-01-18 15:17:08,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-01-18 15:17:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 743. [2022-01-18 15:17:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.3086253369272236) internal successors, (2455), 742 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2455 transitions. [2022-01-18 15:17:08,374 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2455 transitions. Word has length 21 [2022-01-18 15:17:08,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:08,374 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2455 transitions. [2022-01-18 15:17:08,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2455 transitions. [2022-01-18 15:17:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:08,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:08,375 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:08,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Ended with exit code 0 [2022-01-18 15:17:08,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,461 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:08,576 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:08,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:08,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1392938394, now seen corresponding path program 461 times [2022-01-18 15:17:08,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:08,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934005141] [2022-01-18 15:17:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:08,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:08,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:08,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934005141] [2022-01-18 15:17:08,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934005141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:08,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545436727] [2022-01-18 15:17:08,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:08,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:08,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:08,697 INFO L229 MonitoredProcess]: Starting monitored process 462 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:08,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Waiting until timeout for monitored process [2022-01-18 15:17:08,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:08,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:08,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:08,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:08,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:08,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:08,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:08,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:08,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:08,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:08,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:09,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:09,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:09,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:09,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:09,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:09,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:09,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545436727] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:09,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:09,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:09,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010319450] [2022-01-18 15:17:09,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:09,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:09,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:09,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:09,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:09,176 INFO L87 Difference]: Start difference. First operand 743 states and 2455 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:09,600 INFO L93 Difference]: Finished difference Result 1081 states and 3468 transitions. [2022-01-18 15:17:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:17:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:09,602 INFO L225 Difference]: With dead ends: 1081 [2022-01-18 15:17:09,602 INFO L226 Difference]: Without dead ends: 1062 [2022-01-18 15:17:09,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:17:09,602 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 90 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:09,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 232 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 648 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-01-18 15:17:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-01-18 15:17:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 748. [2022-01-18 15:17:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.3078982597054885) internal successors, (2471), 747 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2471 transitions. [2022-01-18 15:17:09,611 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2471 transitions. Word has length 21 [2022-01-18 15:17:09,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:09,612 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 2471 transitions. [2022-01-18 15:17:09,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2471 transitions. [2022-01-18 15:17:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:09,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:09,612 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:09,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:09,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,462 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:09,813 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:09,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:09,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1381427179, now seen corresponding path program 462 times [2022-01-18 15:17:09,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:09,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253261233] [2022-01-18 15:17:09,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:09,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:09,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:09,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253261233] [2022-01-18 15:17:09,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253261233] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:09,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549067508] [2022-01-18 15:17:09,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:09,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:09,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:09,905 INFO L229 MonitoredProcess]: Starting monitored process 463 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:09,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Waiting until timeout for monitored process [2022-01-18 15:17:09,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:17:09,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:09,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:09,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:10,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:10,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:10,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:10,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:10,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:10,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:17:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:10,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:10,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:10,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:10,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:10,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:10,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:10,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:10,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549067508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:10,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:10,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:17:10,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844578566] [2022-01-18 15:17:10,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:10,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:10,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:10,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:10,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:10,389 INFO L87 Difference]: Start difference. First operand 748 states and 2471 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:10,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:10,694 INFO L93 Difference]: Finished difference Result 1149 states and 3660 transitions. [2022-01-18 15:17:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:17:10,694 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:10,696 INFO L225 Difference]: With dead ends: 1149 [2022-01-18 15:17:10,696 INFO L226 Difference]: Without dead ends: 1089 [2022-01-18 15:17:10,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:17:10,696 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 73 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:10,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 166 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 537 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 15:17:10,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-01-18 15:17:10,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 748. [2022-01-18 15:17:10,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.3052208835341363) internal successors, (2469), 747 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2469 transitions. [2022-01-18 15:17:10,706 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2469 transitions. Word has length 21 [2022-01-18 15:17:10,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:10,706 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 2469 transitions. [2022-01-18 15:17:10,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2469 transitions. [2022-01-18 15:17:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:10,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:10,707 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:10,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Ended with exit code 0 [2022-01-18 15:17:10,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,463 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:10,907 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:10,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:10,908 INFO L85 PathProgramCache]: Analyzing trace with hash 394875194, now seen corresponding path program 463 times [2022-01-18 15:17:10,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:10,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415334668] [2022-01-18 15:17:10,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:10,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:11,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:11,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415334668] [2022-01-18 15:17:11,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415334668] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:11,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704967743] [2022-01-18 15:17:11,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:11,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:11,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:11,029 INFO L229 MonitoredProcess]: Starting monitored process 464 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:11,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Waiting until timeout for monitored process [2022-01-18 15:17:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:11,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:11,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:11,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:11,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:11,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:11,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:11,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:11,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:11,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:11,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:11,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:11,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:11,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:11,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:11,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704967743] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:11,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:11,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:11,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383830481] [2022-01-18 15:17:11,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:11,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:11,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:11,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:11,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:11,515 INFO L87 Difference]: Start difference. First operand 748 states and 2469 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:11,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:11,914 INFO L93 Difference]: Finished difference Result 1081 states and 3483 transitions. [2022-01-18 15:17:11,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:17:11,914 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:11,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:11,916 INFO L225 Difference]: With dead ends: 1081 [2022-01-18 15:17:11,916 INFO L226 Difference]: Without dead ends: 1058 [2022-01-18 15:17:11,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:17:11,916 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 67 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:11,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 231 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 732 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2022-01-18 15:17:11,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-01-18 15:17:11,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 746. [2022-01-18 15:17:11,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.3073825503355705) internal successors, (2464), 745 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2464 transitions. [2022-01-18 15:17:11,925 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2464 transitions. Word has length 21 [2022-01-18 15:17:11,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:11,925 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2464 transitions. [2022-01-18 15:17:11,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:11,926 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2464 transitions. [2022-01-18 15:17:11,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:11,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:11,926 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:11,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:12,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2022-01-18 15:17:12,127 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:12,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1435110992, now seen corresponding path program 464 times [2022-01-18 15:17:12,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:12,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512979277] [2022-01-18 15:17:12,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:12,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:12,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:12,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512979277] [2022-01-18 15:17:12,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512979277] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:12,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287470233] [2022-01-18 15:17:12,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:12,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:12,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:12,246 INFO L229 MonitoredProcess]: Starting monitored process 465 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:12,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Waiting until timeout for monitored process [2022-01-18 15:17:12,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:12,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:12,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:12,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:12,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:12,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:12,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:12,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:12,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:12,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:17:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:12,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:12,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:12,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:12,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:12,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:12,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:12,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:12,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287470233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:12,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:12,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:12,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822574894] [2022-01-18 15:17:12,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:12,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:12,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:12,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:12,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:12,699 INFO L87 Difference]: Start difference. First operand 746 states and 2464 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:13,081 INFO L93 Difference]: Finished difference Result 1184 states and 3744 transitions. [2022-01-18 15:17:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:17:13,082 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:13,084 INFO L225 Difference]: With dead ends: 1184 [2022-01-18 15:17:13,084 INFO L226 Difference]: Without dead ends: 1134 [2022-01-18 15:17:13,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:17:13,084 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:13,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 233 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 665 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-01-18 15:17:13,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-01-18 15:17:13,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 746. [2022-01-18 15:17:13,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.3073825503355705) internal successors, (2464), 745 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2464 transitions. [2022-01-18 15:17:13,093 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2464 transitions. Word has length 21 [2022-01-18 15:17:13,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:13,093 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2464 transitions. [2022-01-18 15:17:13,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2464 transitions. [2022-01-18 15:17:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:13,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:13,094 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:13,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Ended with exit code 0 [2022-01-18 15:17:13,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2022-01-18 15:17:13,295 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:13,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:13,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2038351989, now seen corresponding path program 465 times [2022-01-18 15:17:13,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:13,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143896696] [2022-01-18 15:17:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:13,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:13,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143896696] [2022-01-18 15:17:13,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143896696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882687195] [2022-01-18 15:17:13,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:13,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:13,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:13,415 INFO L229 MonitoredProcess]: Starting monitored process 466 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:13,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Waiting until timeout for monitored process [2022-01-18 15:17:13,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:17:13,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:13,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:13,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:13,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:13,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 15:17:13,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:13,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-01-18 15:17:13,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:13,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-01-18 15:17:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:13,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:13,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:13,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:13,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:13,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:13,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:13,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:14,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882687195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:14,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:14,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:17:14,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549850205] [2022-01-18 15:17:14,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:14,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:14,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:14,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:14,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:14,008 INFO L87 Difference]: Start difference. First operand 746 states and 2464 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:14,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:14,711 INFO L93 Difference]: Finished difference Result 1244 states and 3939 transitions. [2022-01-18 15:17:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:17:14,711 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:14,713 INFO L225 Difference]: With dead ends: 1244 [2022-01-18 15:17:14,713 INFO L226 Difference]: Without dead ends: 1196 [2022-01-18 15:17:14,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:17:14,713 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 82 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:14,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 265 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 903 Invalid, 0 Unknown, 13 Unchecked, 0.3s Time] [2022-01-18 15:17:14,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-01-18 15:17:14,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 753. [2022-01-18 15:17:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.304521276595745) internal successors, (2485), 752 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2485 transitions. [2022-01-18 15:17:14,723 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2485 transitions. Word has length 21 [2022-01-18 15:17:14,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:14,723 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2485 transitions. [2022-01-18 15:17:14,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2485 transitions. [2022-01-18 15:17:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:14,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:14,724 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:14,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:14,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable476,466 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:14,924 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:14,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1040288789, now seen corresponding path program 466 times [2022-01-18 15:17:14,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:14,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454122570] [2022-01-18 15:17:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:14,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:15,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:15,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454122570] [2022-01-18 15:17:15,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454122570] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:15,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144451654] [2022-01-18 15:17:15,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:15,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:15,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:15,043 INFO L229 MonitoredProcess]: Starting monitored process 467 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:15,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Waiting until timeout for monitored process [2022-01-18 15:17:15,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:15,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:15,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:15,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:15,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:15,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:15,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:15,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:15,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:15,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:15,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:15,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:15,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:15,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:15,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:15,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:15,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:15,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144451654] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:15,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:15,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:15,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940387410] [2022-01-18 15:17:15,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:15,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:15,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:15,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:15,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:15,505 INFO L87 Difference]: Start difference. First operand 753 states and 2485 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:15,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:15,891 INFO L93 Difference]: Finished difference Result 1088 states and 3482 transitions. [2022-01-18 15:17:15,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:17:15,891 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:15,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:15,892 INFO L225 Difference]: With dead ends: 1088 [2022-01-18 15:17:15,893 INFO L226 Difference]: Without dead ends: 1067 [2022-01-18 15:17:15,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:17:15,893 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 86 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:15,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 205 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 607 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-01-18 15:17:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2022-01-18 15:17:15,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 749. [2022-01-18 15:17:15,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.3088235294117645) internal successors, (2475), 748 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2475 transitions. [2022-01-18 15:17:15,902 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2475 transitions. Word has length 21 [2022-01-18 15:17:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:15,902 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2475 transitions. [2022-01-18 15:17:15,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2475 transitions. [2022-01-18 15:17:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:15,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:15,903 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:15,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Ended with exit code 0 [2022-01-18 15:17:16,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 467 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2022-01-18 15:17:16,103 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:16,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:16,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1529954323, now seen corresponding path program 467 times [2022-01-18 15:17:16,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:16,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331632642] [2022-01-18 15:17:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:16,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:16,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:16,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331632642] [2022-01-18 15:17:16,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331632642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:16,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111366859] [2022-01-18 15:17:16,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:16,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:16,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:16,206 INFO L229 MonitoredProcess]: Starting monitored process 468 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:16,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Waiting until timeout for monitored process [2022-01-18 15:17:16,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:16,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:16,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:16,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:16,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:16,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:16,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:16,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:16,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:16,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:17:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:16,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:16,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:16,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:16,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:16,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:16,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:16,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:16,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111366859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:16,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:16,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:17:16,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270056015] [2022-01-18 15:17:16,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:16,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:16,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:16,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:16,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:16,636 INFO L87 Difference]: Start difference. First operand 749 states and 2475 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:16,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:16,800 INFO L93 Difference]: Finished difference Result 855 states and 2769 transitions. [2022-01-18 15:17:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:16,800 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:16,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:16,801 INFO L225 Difference]: With dead ends: 855 [2022-01-18 15:17:16,801 INFO L226 Difference]: Without dead ends: 811 [2022-01-18 15:17:16,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:16,802 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:16,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 137 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 446 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 15:17:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-01-18 15:17:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 753. [2022-01-18 15:17:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.309840425531915) internal successors, (2489), 752 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2489 transitions. [2022-01-18 15:17:16,809 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2489 transitions. Word has length 21 [2022-01-18 15:17:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:16,809 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2489 transitions. [2022-01-18 15:17:16,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2489 transitions. [2022-01-18 15:17:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:16,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:16,810 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:16,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:17,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2022-01-18 15:17:17,011 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:17,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1766949773, now seen corresponding path program 468 times [2022-01-18 15:17:17,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:17,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456319274] [2022-01-18 15:17:17,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:17,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:17,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:17,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456319274] [2022-01-18 15:17:17,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456319274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:17,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142190480] [2022-01-18 15:17:17,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:17,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:17,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:17,114 INFO L229 MonitoredProcess]: Starting monitored process 469 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:17,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Waiting until timeout for monitored process [2022-01-18 15:17:17,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:17:17,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:17,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:17,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:17,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:17,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:17,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:17,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:17,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:17,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:17:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:17,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:17,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:17,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:17,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:17,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:17,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:17,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:17,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142190480] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:17,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:17,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:17:17,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491102742] [2022-01-18 15:17:17,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:17,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:17:17,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:17,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:17:17,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:17,484 INFO L87 Difference]: Start difference. First operand 753 states and 2489 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:17,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:17,610 INFO L93 Difference]: Finished difference Result 826 states and 2700 transitions. [2022-01-18 15:17:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:17,611 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:17,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:17,612 INFO L225 Difference]: With dead ends: 826 [2022-01-18 15:17:17,612 INFO L226 Difference]: Without dead ends: 798 [2022-01-18 15:17:17,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:17,612 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:17,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 130 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 332 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-01-18 15:17:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-01-18 15:17:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 756. [2022-01-18 15:17:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.3125827814569537) internal successors, (2501), 755 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2501 transitions. [2022-01-18 15:17:17,621 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2501 transitions. Word has length 21 [2022-01-18 15:17:17,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:17,621 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 2501 transitions. [2022-01-18 15:17:17,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:17,621 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2501 transitions. [2022-01-18 15:17:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:17,622 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:17,622 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:17,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Ended with exit code 0 [2022-01-18 15:17:17,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,469 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:17,822 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:17,822 INFO L85 PathProgramCache]: Analyzing trace with hash 990065517, now seen corresponding path program 469 times [2022-01-18 15:17:17,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:17,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2525748] [2022-01-18 15:17:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:17,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:17,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:17,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2525748] [2022-01-18 15:17:17,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2525748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:17,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337648334] [2022-01-18 15:17:17,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:17,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:17,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:17,925 INFO L229 MonitoredProcess]: Starting monitored process 470 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:17,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Waiting until timeout for monitored process [2022-01-18 15:17:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:17,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:17,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:18,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:18,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:18,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:18,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:18,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:18,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:17:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:18,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:18,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:18,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:18,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:18,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:18,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:18,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:18,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337648334] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:18,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:18,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:17:18,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903493776] [2022-01-18 15:17:18,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:18,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:18,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:18,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:18,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:18,325 INFO L87 Difference]: Start difference. First operand 756 states and 2501 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:18,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:18,485 INFO L93 Difference]: Finished difference Result 832 states and 2706 transitions. [2022-01-18 15:17:18,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:18,485 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:18,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:18,486 INFO L225 Difference]: With dead ends: 832 [2022-01-18 15:17:18,486 INFO L226 Difference]: Without dead ends: 810 [2022-01-18 15:17:18,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:18,486 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:18,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 145 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 445 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-18 15:17:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-01-18 15:17:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 756. [2022-01-18 15:17:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.3152317880794704) internal successors, (2503), 755 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2503 transitions. [2022-01-18 15:17:18,494 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2503 transitions. Word has length 21 [2022-01-18 15:17:18,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:18,495 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 2503 transitions. [2022-01-18 15:17:18,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2503 transitions. [2022-01-18 15:17:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:18,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:18,495 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:18,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Ended with exit code 0 [2022-01-18 15:17:18,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2022-01-18 15:17:18,696 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:18,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:18,696 INFO L85 PathProgramCache]: Analyzing trace with hash -230540111, now seen corresponding path program 470 times [2022-01-18 15:17:18,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:18,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903956673] [2022-01-18 15:17:18,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:18,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:18,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:18,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903956673] [2022-01-18 15:17:18,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903956673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:18,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278615828] [2022-01-18 15:17:18,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:18,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:18,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:18,799 INFO L229 MonitoredProcess]: Starting monitored process 471 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:18,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Waiting until timeout for monitored process [2022-01-18 15:17:18,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:18,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:18,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:18,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:18,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:18,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:19,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:19,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:19,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:19,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:17:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:19,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:19,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:19,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:19,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:19,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:19,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:19,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:19,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278615828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:19,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:19,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:17:19,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081582607] [2022-01-18 15:17:19,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:19,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:19,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:19,216 INFO L87 Difference]: Start difference. First operand 756 states and 2503 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:19,400 INFO L93 Difference]: Finished difference Result 878 states and 2812 transitions. [2022-01-18 15:17:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:17:19,400 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:19,401 INFO L225 Difference]: With dead ends: 878 [2022-01-18 15:17:19,401 INFO L226 Difference]: Without dead ends: 848 [2022-01-18 15:17:19,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:19,401 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:19,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 158 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 517 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 15:17:19,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-01-18 15:17:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 756. [2022-01-18 15:17:19,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.3152317880794704) internal successors, (2503), 755 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:19,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2503 transitions. [2022-01-18 15:17:19,409 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2503 transitions. Word has length 21 [2022-01-18 15:17:19,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:19,409 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 2503 transitions. [2022-01-18 15:17:19,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:19,409 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2503 transitions. [2022-01-18 15:17:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:19,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:19,410 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:19,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Ended with exit code 0 [2022-01-18 15:17:19,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,471 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:19,611 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:19,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:19,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1994171153, now seen corresponding path program 471 times [2022-01-18 15:17:19,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:19,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187496069] [2022-01-18 15:17:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:19,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:19,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:19,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187496069] [2022-01-18 15:17:19,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187496069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:19,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046088279] [2022-01-18 15:17:19,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:19,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:19,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:19,713 INFO L229 MonitoredProcess]: Starting monitored process 472 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:19,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Waiting until timeout for monitored process [2022-01-18 15:17:19,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:17:19,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:19,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:19,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:19,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:19,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:19,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:19,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:19,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:19,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:17:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:19,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:19,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:19,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:20,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:20,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:20,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:20,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:20,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046088279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:20,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:20,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:17:20,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829497612] [2022-01-18 15:17:20,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:20,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:17:20,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:20,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:17:20,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:20,082 INFO L87 Difference]: Start difference. First operand 756 states and 2503 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:20,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:20,240 INFO L93 Difference]: Finished difference Result 843 states and 2758 transitions. [2022-01-18 15:17:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:20,240 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:20,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:20,242 INFO L225 Difference]: With dead ends: 843 [2022-01-18 15:17:20,242 INFO L226 Difference]: Without dead ends: 821 [2022-01-18 15:17:20,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:20,242 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:20,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 124 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 435 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-01-18 15:17:20,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-01-18 15:17:20,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 757. [2022-01-18 15:17:20,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.3174603174603177) internal successors, (2508), 756 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2508 transitions. [2022-01-18 15:17:20,250 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2508 transitions. Word has length 21 [2022-01-18 15:17:20,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:20,250 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2508 transitions. [2022-01-18 15:17:20,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:20,250 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2508 transitions. [2022-01-18 15:17:20,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:20,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:20,251 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:20,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Ended with exit code 0 [2022-01-18 15:17:20,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,472 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:20,451 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:20,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:20,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1217286897, now seen corresponding path program 472 times [2022-01-18 15:17:20,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:20,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180231812] [2022-01-18 15:17:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:20,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:20,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:20,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180231812] [2022-01-18 15:17:20,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180231812] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:20,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826343503] [2022-01-18 15:17:20,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:20,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:20,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:20,553 INFO L229 MonitoredProcess]: Starting monitored process 473 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:20,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Waiting until timeout for monitored process [2022-01-18 15:17:20,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:20,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:20,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:20,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:20,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:20,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:20,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:20,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:20,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:20,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:17:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:20,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:20,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:20,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:20,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:20,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:20,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:20,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:20,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826343503] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:20,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:20,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:17:20,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597302560] [2022-01-18 15:17:20,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:20,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:20,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:20,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:20,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:20,960 INFO L87 Difference]: Start difference. First operand 757 states and 2508 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:21,145 INFO L93 Difference]: Finished difference Result 847 states and 2748 transitions. [2022-01-18 15:17:21,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:21,145 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:21,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:21,147 INFO L225 Difference]: With dead ends: 847 [2022-01-18 15:17:21,147 INFO L226 Difference]: Without dead ends: 825 [2022-01-18 15:17:21,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:21,147 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:21,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 170 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 519 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-01-18 15:17:21,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-18 15:17:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 753. [2022-01-18 15:17:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.3125) internal successors, (2491), 752 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2491 transitions. [2022-01-18 15:17:21,155 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2491 transitions. Word has length 21 [2022-01-18 15:17:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:21,155 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2491 transitions. [2022-01-18 15:17:21,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2491 transitions. [2022-01-18 15:17:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:21,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:21,156 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:21,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Ended with exit code 0 [2022-01-18 15:17:21,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,473 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:21,356 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:21,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1274893994, now seen corresponding path program 473 times [2022-01-18 15:17:21,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:21,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359145906] [2022-01-18 15:17:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:21,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:21,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:21,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359145906] [2022-01-18 15:17:21,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359145906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:21,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872489792] [2022-01-18 15:17:21,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:21,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:21,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:21,487 INFO L229 MonitoredProcess]: Starting monitored process 474 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:21,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Waiting until timeout for monitored process [2022-01-18 15:17:21,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:21,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:21,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:21,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:21,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:21,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:21,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:21,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:21,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:21,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:21,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:21,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:21,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:21,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:21,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:21,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:21,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:21,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872489792] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:21,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:21,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:21,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437689009] [2022-01-18 15:17:21,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:21,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:21,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:21,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:21,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:21,997 INFO L87 Difference]: Start difference. First operand 753 states and 2491 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:22,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:22,542 INFO L93 Difference]: Finished difference Result 1127 states and 3620 transitions. [2022-01-18 15:17:22,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:17:22,542 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:22,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:22,544 INFO L225 Difference]: With dead ends: 1127 [2022-01-18 15:17:22,544 INFO L226 Difference]: Without dead ends: 1108 [2022-01-18 15:17:22,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:17:22,544 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:22,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 299 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 766 Invalid, 0 Unknown, 148 Unchecked, 0.3s Time] [2022-01-18 15:17:22,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-01-18 15:17:22,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 756. [2022-01-18 15:17:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.3152317880794704) internal successors, (2503), 755 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:22,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2503 transitions. [2022-01-18 15:17:22,557 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2503 transitions. Word has length 21 [2022-01-18 15:17:22,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:22,557 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 2503 transitions. [2022-01-18 15:17:22,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:22,557 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2503 transitions. [2022-01-18 15:17:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:22,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:22,559 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:22,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Ended with exit code 0 [2022-01-18 15:17:22,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,474 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:22,771 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:22,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:22,771 INFO L85 PathProgramCache]: Analyzing trace with hash 245707729, now seen corresponding path program 474 times [2022-01-18 15:17:22,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:22,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74092311] [2022-01-18 15:17:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:22,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:22,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:22,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74092311] [2022-01-18 15:17:22,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74092311] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:22,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332058172] [2022-01-18 15:17:22,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:22,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:22,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:22,891 INFO L229 MonitoredProcess]: Starting monitored process 475 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:22,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Waiting until timeout for monitored process [2022-01-18 15:17:22,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:17:22,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:22,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:22,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:22,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:22,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:23,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:23,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:23,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:23,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:17:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:23,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:23,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:23,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:23,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:23,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:23,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:23,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:23,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332058172] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:23,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:23,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:17:23,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42346047] [2022-01-18 15:17:23,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:23,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:23,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:23,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:23,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:23,404 INFO L87 Difference]: Start difference. First operand 756 states and 2503 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:23,858 INFO L93 Difference]: Finished difference Result 1266 states and 3979 transitions. [2022-01-18 15:17:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:17:23,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:23,860 INFO L225 Difference]: With dead ends: 1266 [2022-01-18 15:17:23,860 INFO L226 Difference]: Without dead ends: 1200 [2022-01-18 15:17:23,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:17:23,860 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 113 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:23,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 193 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 493 Invalid, 0 Unknown, 124 Unchecked, 0.2s Time] [2022-01-18 15:17:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-01-18 15:17:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 759. [2022-01-18 15:17:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.3100263852242744) internal successors, (2509), 758 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2509 transitions. [2022-01-18 15:17:23,870 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2509 transitions. Word has length 21 [2022-01-18 15:17:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:23,870 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2509 transitions. [2022-01-18 15:17:23,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2509 transitions. [2022-01-18 15:17:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:23,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:23,871 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:23,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:24,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 475 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2022-01-18 15:17:24,072 INFO L402 AbstractCegarLoop]: === Iteration 487 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:24,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:24,072 INFO L85 PathProgramCache]: Analyzing trace with hash 2022010102, now seen corresponding path program 475 times [2022-01-18 15:17:24,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:24,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799417309] [2022-01-18 15:17:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:24,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:24,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:24,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799417309] [2022-01-18 15:17:24,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799417309] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:24,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860924045] [2022-01-18 15:17:24,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:24,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:24,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:24,201 INFO L229 MonitoredProcess]: Starting monitored process 476 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:24,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Waiting until timeout for monitored process [2022-01-18 15:17:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:24,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:24,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:24,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:24,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:24,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:24,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:24,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:24,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:24,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:24,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:24,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:24,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:24,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:24,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:24,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:24,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860924045] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:24,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:24,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:24,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594482895] [2022-01-18 15:17:24,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:24,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:24,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:24,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:24,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:24,689 INFO L87 Difference]: Start difference. First operand 759 states and 2509 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:25,077 INFO L93 Difference]: Finished difference Result 1092 states and 3515 transitions. [2022-01-18 15:17:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:17:25,077 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:25,079 INFO L225 Difference]: With dead ends: 1092 [2022-01-18 15:17:25,079 INFO L226 Difference]: Without dead ends: 1069 [2022-01-18 15:17:25,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:17:25,080 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:25,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 276 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 676 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2022-01-18 15:17:25,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-01-18 15:17:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 757. [2022-01-18 15:17:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.312169312169312) internal successors, (2504), 756 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2504 transitions. [2022-01-18 15:17:25,089 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2504 transitions. Word has length 21 [2022-01-18 15:17:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:25,089 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2504 transitions. [2022-01-18 15:17:25,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2504 transitions. [2022-01-18 15:17:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:25,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:25,090 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:25,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Ended with exit code 0 [2022-01-18 15:17:25,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2022-01-18 15:17:25,290 INFO L402 AbstractCegarLoop]: === Iteration 488 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:25,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:25,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1678860451, now seen corresponding path program 476 times [2022-01-18 15:17:25,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:25,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764085248] [2022-01-18 15:17:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:25,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:25,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:25,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764085248] [2022-01-18 15:17:25,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764085248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:25,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786434897] [2022-01-18 15:17:25,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:25,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:25,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:25,394 INFO L229 MonitoredProcess]: Starting monitored process 477 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:25,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Waiting until timeout for monitored process [2022-01-18 15:17:25,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:25,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:25,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:25,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:25,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:25,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:25,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:25,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:25,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:25,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:17:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:25,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:25,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:25,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:25,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:25,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:25,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:25,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:25,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786434897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:25,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:25,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:17:25,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554582309] [2022-01-18 15:17:25,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:25,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:25,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:25,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:25,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:25,833 INFO L87 Difference]: Start difference. First operand 757 states and 2504 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:25,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:25,988 INFO L93 Difference]: Finished difference Result 875 states and 2830 transitions. [2022-01-18 15:17:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:17:25,989 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:25,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:25,990 INFO L225 Difference]: With dead ends: 875 [2022-01-18 15:17:25,990 INFO L226 Difference]: Without dead ends: 831 [2022-01-18 15:17:25,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:25,990 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:25,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 145 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 441 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-01-18 15:17:25,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-18 15:17:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 757. [2022-01-18 15:17:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.312169312169312) internal successors, (2504), 756 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2504 transitions. [2022-01-18 15:17:25,998 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2504 transitions. Word has length 21 [2022-01-18 15:17:25,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:25,998 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2504 transitions. [2022-01-18 15:17:25,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:25,998 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2504 transitions. [2022-01-18 15:17:25,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:25,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:25,999 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:26,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Ended with exit code 0 [2022-01-18 15:17:26,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2022-01-18 15:17:26,200 INFO L402 AbstractCegarLoop]: === Iteration 489 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:26,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:26,200 INFO L85 PathProgramCache]: Analyzing trace with hash 24520218, now seen corresponding path program 477 times [2022-01-18 15:17:26,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:26,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138608760] [2022-01-18 15:17:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:26,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:26,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:26,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138608760] [2022-01-18 15:17:26,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138608760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:26,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533089200] [2022-01-18 15:17:26,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:26,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:26,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:26,337 INFO L229 MonitoredProcess]: Starting monitored process 478 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:26,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Waiting until timeout for monitored process [2022-01-18 15:17:26,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:17:26,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:26,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:17:26,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:26,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:26,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:26,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:26,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 15:17:26,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:26,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-01-18 15:17:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:26,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:26,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:26,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:26,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:26,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:26,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:26,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:27,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533089200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:27,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:27,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:27,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250753271] [2022-01-18 15:17:27,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:27,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:27,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:27,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:27,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:27,020 INFO L87 Difference]: Start difference. First operand 757 states and 2504 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:27,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:27,597 INFO L93 Difference]: Finished difference Result 1156 states and 3667 transitions. [2022-01-18 15:17:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:17:27,598 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:27,599 INFO L225 Difference]: With dead ends: 1156 [2022-01-18 15:17:27,599 INFO L226 Difference]: Without dead ends: 1118 [2022-01-18 15:17:27,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:17:27,600 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 103 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:27,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 364 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 793 Invalid, 0 Unknown, 246 Unchecked, 0.3s Time] [2022-01-18 15:17:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-01-18 15:17:27,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 762. [2022-01-18 15:17:27,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.3180026281208934) internal successors, (2525), 761 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:27,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2525 transitions. [2022-01-18 15:17:27,609 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2525 transitions. Word has length 21 [2022-01-18 15:17:27,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:27,609 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 2525 transitions. [2022-01-18 15:17:27,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:27,609 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2525 transitions. [2022-01-18 15:17:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:27,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:27,610 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:27,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:27,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2022-01-18 15:17:27,810 INFO L402 AbstractCegarLoop]: === Iteration 490 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:27,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:27,811 INFO L85 PathProgramCache]: Analyzing trace with hash -2022834726, now seen corresponding path program 478 times [2022-01-18 15:17:27,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:27,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89435674] [2022-01-18 15:17:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:27,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:27,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:27,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89435674] [2022-01-18 15:17:27,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89435674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:27,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999547850] [2022-01-18 15:17:27,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:27,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:27,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:27,946 INFO L229 MonitoredProcess]: Starting monitored process 479 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:27,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Waiting until timeout for monitored process [2022-01-18 15:17:27,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:27,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:27,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:27,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:28,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:28,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:28,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:28,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:28,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:28,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:28,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:28,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:28,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:28,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:28,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:28,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:28,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:28,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999547850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:28,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:28,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:28,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554898838] [2022-01-18 15:17:28,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:28,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:28,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:28,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:28,442 INFO L87 Difference]: Start difference. First operand 762 states and 2525 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:28,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:28,951 INFO L93 Difference]: Finished difference Result 1113 states and 3562 transitions. [2022-01-18 15:17:28,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:17:28,951 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:28,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:28,953 INFO L225 Difference]: With dead ends: 1113 [2022-01-18 15:17:28,953 INFO L226 Difference]: Without dead ends: 1094 [2022-01-18 15:17:28,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:17:28,953 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 106 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:28,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 235 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 716 Invalid, 0 Unknown, 22 Unchecked, 0.3s Time] [2022-01-18 15:17:28,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-01-18 15:17:28,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 762. [2022-01-18 15:17:28,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.3180026281208934) internal successors, (2525), 761 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2525 transitions. [2022-01-18 15:17:28,963 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2525 transitions. Word has length 21 [2022-01-18 15:17:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:28,963 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 2525 transitions. [2022-01-18 15:17:28,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2525 transitions. [2022-01-18 15:17:28,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:28,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:28,964 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:28,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Ended with exit code 0 [2022-01-18 15:17:29,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,479 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:29,164 INFO L402 AbstractCegarLoop]: === Iteration 491 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:29,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:29,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1685481103, now seen corresponding path program 479 times [2022-01-18 15:17:29,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:29,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59399344] [2022-01-18 15:17:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:29,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:29,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:29,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59399344] [2022-01-18 15:17:29,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59399344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:29,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513897811] [2022-01-18 15:17:29,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:29,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:29,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:29,268 INFO L229 MonitoredProcess]: Starting monitored process 480 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:29,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Waiting until timeout for monitored process [2022-01-18 15:17:29,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:17:29,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:29,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:29,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:29,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:29,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:29,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:29,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:29,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:17:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:29,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:29,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:29,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:29,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:29,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:29,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:29,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:29,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513897811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:29,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:29,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:17:29,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185083068] [2022-01-18 15:17:29,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:29,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:29,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:29,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:29,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:29,723 INFO L87 Difference]: Start difference. First operand 762 states and 2525 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:29,887 INFO L93 Difference]: Finished difference Result 870 states and 2826 transitions. [2022-01-18 15:17:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:17:29,887 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:29,888 INFO L225 Difference]: With dead ends: 870 [2022-01-18 15:17:29,888 INFO L226 Difference]: Without dead ends: 848 [2022-01-18 15:17:29,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:29,889 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:29,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 196 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 459 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-01-18 15:17:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-01-18 15:17:29,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 764. [2022-01-18 15:17:29,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.3197903014416776) internal successors, (2533), 763 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:29,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2533 transitions. [2022-01-18 15:17:29,897 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2533 transitions. Word has length 21 [2022-01-18 15:17:29,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:29,897 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 2533 transitions. [2022-01-18 15:17:29,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:29,897 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2533 transitions. [2022-01-18 15:17:29,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:29,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:29,898 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:29,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Ended with exit code 0 [2022-01-18 15:17:30,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,480 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:30,098 INFO L402 AbstractCegarLoop]: === Iteration 492 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:30,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:30,098 INFO L85 PathProgramCache]: Analyzing trace with hash 416159885, now seen corresponding path program 480 times [2022-01-18 15:17:30,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:30,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244283304] [2022-01-18 15:17:30,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:30,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:30,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:30,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244283304] [2022-01-18 15:17:30,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244283304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:30,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330980226] [2022-01-18 15:17:30,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:30,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:30,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:30,202 INFO L229 MonitoredProcess]: Starting monitored process 481 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:30,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Waiting until timeout for monitored process [2022-01-18 15:17:30,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:17:30,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:30,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:30,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:30,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:30,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:30,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:30,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:30,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:30,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:17:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:30,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:30,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:30,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:30,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:30,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:30,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:30,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:30,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330980226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:30,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:30,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:17:30,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748420519] [2022-01-18 15:17:30,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:30,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:30,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:30,681 INFO L87 Difference]: Start difference. First operand 764 states and 2533 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:30,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:30,860 INFO L93 Difference]: Finished difference Result 871 states and 2817 transitions. [2022-01-18 15:17:30,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:17:30,861 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:30,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:30,862 INFO L225 Difference]: With dead ends: 871 [2022-01-18 15:17:30,862 INFO L226 Difference]: Without dead ends: 861 [2022-01-18 15:17:30,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:30,862 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:30,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 183 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 502 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-01-18 15:17:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-18 15:17:30,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 760. [2022-01-18 15:17:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.3148880105401846) internal successors, (2516), 759 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:30,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2516 transitions. [2022-01-18 15:17:30,870 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2516 transitions. Word has length 21 [2022-01-18 15:17:30,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:30,871 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2516 transitions. [2022-01-18 15:17:30,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:30,871 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2516 transitions. [2022-01-18 15:17:30,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:30,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:30,872 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:30,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Ended with exit code 0 [2022-01-18 15:17:31,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,481 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:31,072 INFO L402 AbstractCegarLoop]: === Iteration 493 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:31,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:31,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1202213905, now seen corresponding path program 481 times [2022-01-18 15:17:31,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:31,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515841461] [2022-01-18 15:17:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:31,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:31,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:31,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515841461] [2022-01-18 15:17:31,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515841461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:31,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246563191] [2022-01-18 15:17:31,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:31,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:31,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:31,210 INFO L229 MonitoredProcess]: Starting monitored process 482 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:31,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Waiting until timeout for monitored process [2022-01-18 15:17:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:31,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:31,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:31,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:31,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:31,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:31,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:31,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:31,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:17:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:31,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:31,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:31,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:31,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:31,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:31,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:31,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:31,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246563191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:31,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:31,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:17:31,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760952355] [2022-01-18 15:17:31,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:31,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:31,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:31,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:31,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:31,715 INFO L87 Difference]: Start difference. First operand 760 states and 2516 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:32,396 INFO L93 Difference]: Finished difference Result 1342 states and 4196 transitions. [2022-01-18 15:17:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:17:32,396 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:32,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:32,399 INFO L225 Difference]: With dead ends: 1342 [2022-01-18 15:17:32,399 INFO L226 Difference]: Without dead ends: 1288 [2022-01-18 15:17:32,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:17:32,399 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 105 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:32,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 294 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 775 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2022-01-18 15:17:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2022-01-18 15:17:32,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 765. [2022-01-18 15:17:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 3.323298429319372) internal successors, (2539), 764 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2539 transitions. [2022-01-18 15:17:32,410 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2539 transitions. Word has length 21 [2022-01-18 15:17:32,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:32,410 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 2539 transitions. [2022-01-18 15:17:32,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:32,410 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2539 transitions. [2022-01-18 15:17:32,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:32,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:32,411 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:32,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Ended with exit code 0 [2022-01-18 15:17:32,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,482 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:32,612 INFO L402 AbstractCegarLoop]: === Iteration 494 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:32,612 INFO L85 PathProgramCache]: Analyzing trace with hash 346657177, now seen corresponding path program 482 times [2022-01-18 15:17:32,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:32,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229334667] [2022-01-18 15:17:32,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:32,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:32,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:32,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229334667] [2022-01-18 15:17:32,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229334667] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:32,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884027072] [2022-01-18 15:17:32,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:32,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:32,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:32,720 INFO L229 MonitoredProcess]: Starting monitored process 483 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:32,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Waiting until timeout for monitored process [2022-01-18 15:17:32,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:32,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:32,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:32,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:32,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:32,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:32,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:32,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:32,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:32,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:32,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:33,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:33,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:33,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:33,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:33,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:33,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:33,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884027072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:33,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:33,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:17:33,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26016646] [2022-01-18 15:17:33,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:33,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:17:33,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:33,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:17:33,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:33,168 INFO L87 Difference]: Start difference. First operand 765 states and 2539 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:33,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:33,341 INFO L93 Difference]: Finished difference Result 950 states and 3056 transitions. [2022-01-18 15:17:33,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:17:33,341 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:33,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:33,343 INFO L225 Difference]: With dead ends: 950 [2022-01-18 15:17:33,343 INFO L226 Difference]: Without dead ends: 892 [2022-01-18 15:17:33,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:33,343 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:33,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 168 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 470 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2022-01-18 15:17:33,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-01-18 15:17:33,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 759. [2022-01-18 15:17:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.3245382585751977) internal successors, (2520), 758 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2520 transitions. [2022-01-18 15:17:33,351 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2520 transitions. Word has length 21 [2022-01-18 15:17:33,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:33,351 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2520 transitions. [2022-01-18 15:17:33,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2520 transitions. [2022-01-18 15:17:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:33,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:33,352 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:33,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:33,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,483 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:33,552 INFO L402 AbstractCegarLoop]: === Iteration 495 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:33,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2045735814, now seen corresponding path program 483 times [2022-01-18 15:17:33,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:33,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104867534] [2022-01-18 15:17:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:33,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:33,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:33,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104867534] [2022-01-18 15:17:33,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104867534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:33,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492653776] [2022-01-18 15:17:33,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:33,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:33,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:33,666 INFO L229 MonitoredProcess]: Starting monitored process 484 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:33,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Waiting until timeout for monitored process [2022-01-18 15:17:33,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:17:33,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:33,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:33,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:33,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:33,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:33,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:33,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:33,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:33,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:33,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:33,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:33,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:34,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:34,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:34,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:34,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:34,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492653776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:34,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:34,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:17:34,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535743973] [2022-01-18 15:17:34,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:34,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:34,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:34,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:34,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:34,117 INFO L87 Difference]: Start difference. First operand 759 states and 2520 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:34,594 INFO L93 Difference]: Finished difference Result 1180 states and 3774 transitions. [2022-01-18 15:17:34,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:17:34,594 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:34,596 INFO L225 Difference]: With dead ends: 1180 [2022-01-18 15:17:34,596 INFO L226 Difference]: Without dead ends: 1157 [2022-01-18 15:17:34,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:17:34,596 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 98 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:34,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 246 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 720 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-01-18 15:17:34,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-01-18 15:17:34,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 759. [2022-01-18 15:17:34,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.3245382585751977) internal successors, (2520), 758 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2520 transitions. [2022-01-18 15:17:34,606 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2520 transitions. Word has length 21 [2022-01-18 15:17:34,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:34,606 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2520 transitions. [2022-01-18 15:17:34,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:34,606 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2520 transitions. [2022-01-18 15:17:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:34,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:34,607 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:34,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:34,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,484 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:34,807 INFO L402 AbstractCegarLoop]: === Iteration 496 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:34,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:34,807 INFO L85 PathProgramCache]: Analyzing trace with hash 805117535, now seen corresponding path program 484 times [2022-01-18 15:17:34,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:34,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704466461] [2022-01-18 15:17:34,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:34,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:34,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:34,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704466461] [2022-01-18 15:17:34,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704466461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:34,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943367953] [2022-01-18 15:17:34,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:34,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:34,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:34,945 INFO L229 MonitoredProcess]: Starting monitored process 485 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:34,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Waiting until timeout for monitored process [2022-01-18 15:17:34,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:34,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:34,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:34,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:35,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:35,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:35,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:35,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:35,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:35,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:17:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:35,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:35,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:35,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:35,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:35,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:35,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:35,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:35,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943367953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:35,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:35,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:35,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322839758] [2022-01-18 15:17:35,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:35,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:35,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:35,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:35,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:35,430 INFO L87 Difference]: Start difference. First operand 759 states and 2520 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:35,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:35,935 INFO L93 Difference]: Finished difference Result 1305 states and 4089 transitions. [2022-01-18 15:17:35,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:17:35,935 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:35,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:35,937 INFO L225 Difference]: With dead ends: 1305 [2022-01-18 15:17:35,937 INFO L226 Difference]: Without dead ends: 1284 [2022-01-18 15:17:35,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:17:35,937 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 124 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:35,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 205 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 654 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-01-18 15:17:35,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-01-18 15:17:35,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 756. [2022-01-18 15:17:35,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.3152317880794704) internal successors, (2503), 755 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:35,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2503 transitions. [2022-01-18 15:17:35,947 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2503 transitions. Word has length 21 [2022-01-18 15:17:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:35,948 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 2503 transitions. [2022-01-18 15:17:35,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:35,948 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2503 transitions. [2022-01-18 15:17:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:35,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:35,949 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:35,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Ended with exit code 0 [2022-01-18 15:17:36,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 485 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable495 [2022-01-18 15:17:36,149 INFO L402 AbstractCegarLoop]: === Iteration 497 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:36,149 INFO L85 PathProgramCache]: Analyzing trace with hash -110960820, now seen corresponding path program 485 times [2022-01-18 15:17:36,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:36,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320104797] [2022-01-18 15:17:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:36,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:36,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:36,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320104797] [2022-01-18 15:17:36,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320104797] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:36,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891671898] [2022-01-18 15:17:36,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:36,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:36,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:36,284 INFO L229 MonitoredProcess]: Starting monitored process 486 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:36,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Waiting until timeout for monitored process [2022-01-18 15:17:36,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:36,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:36,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:36,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:36,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:36,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:36,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:36,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:36,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:36,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:17:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:36,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:36,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:36,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:36,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:36,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:36,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:36,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:36,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891671898] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:36,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:36,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:36,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315241166] [2022-01-18 15:17:36,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:36,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:36,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:36,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:36,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:36,750 INFO L87 Difference]: Start difference. First operand 756 states and 2503 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:37,270 INFO L93 Difference]: Finished difference Result 1221 states and 3865 transitions. [2022-01-18 15:17:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:17:37,271 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:37,272 INFO L225 Difference]: With dead ends: 1221 [2022-01-18 15:17:37,272 INFO L226 Difference]: Without dead ends: 1171 [2022-01-18 15:17:37,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:17:37,273 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 95 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:37,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 324 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 870 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2022-01-18 15:17:37,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-01-18 15:17:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 761. [2022-01-18 15:17:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.3157894736842106) internal successors, (2520), 760 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2520 transitions. [2022-01-18 15:17:37,282 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2520 transitions. Word has length 21 [2022-01-18 15:17:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:37,282 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2520 transitions. [2022-01-18 15:17:37,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2520 transitions. [2022-01-18 15:17:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:37,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:37,283 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:37,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Ended with exit code 0 [2022-01-18 15:17:37,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2022-01-18 15:17:37,483 INFO L402 AbstractCegarLoop]: === Iteration 498 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:37,484 INFO L85 PathProgramCache]: Analyzing trace with hash 492280177, now seen corresponding path program 486 times [2022-01-18 15:17:37,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:37,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107430765] [2022-01-18 15:17:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:37,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:37,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:37,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:37,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107430765] [2022-01-18 15:17:37,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107430765] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:37,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246451957] [2022-01-18 15:17:37,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:37,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:37,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:37,640 INFO L229 MonitoredProcess]: Starting monitored process 487 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:37,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Waiting until timeout for monitored process [2022-01-18 15:17:37,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:17:37,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:37,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:37,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:37,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:37,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:37,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:37,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:37,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:37,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:37,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:38,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:38,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:38,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:38,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:38,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:38,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:38,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246451957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:38,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:38,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:17:38,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120116501] [2022-01-18 15:17:38,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:38,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:38,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:38,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:38,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:38,136 INFO L87 Difference]: Start difference. First operand 761 states and 2520 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:38,748 INFO L93 Difference]: Finished difference Result 1196 states and 3820 transitions. [2022-01-18 15:17:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:17:38,749 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:38,750 INFO L225 Difference]: With dead ends: 1196 [2022-01-18 15:17:38,751 INFO L226 Difference]: Without dead ends: 1169 [2022-01-18 15:17:38,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:17:38,751 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 69 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:38,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 297 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 901 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2022-01-18 15:17:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-01-18 15:17:38,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 761. [2022-01-18 15:17:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.3157894736842106) internal successors, (2520), 760 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2520 transitions. [2022-01-18 15:17:38,768 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2520 transitions. Word has length 21 [2022-01-18 15:17:38,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:38,768 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2520 transitions. [2022-01-18 15:17:38,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:38,768 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2520 transitions. [2022-01-18 15:17:38,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:38,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:38,769 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:38,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Ended with exit code 0 [2022-01-18 15:17:38,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2022-01-18 15:17:38,969 INFO L402 AbstractCegarLoop]: === Iteration 499 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:38,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:38,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1300338100, now seen corresponding path program 487 times [2022-01-18 15:17:38,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:38,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271618806] [2022-01-18 15:17:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:38,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:39,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:39,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271618806] [2022-01-18 15:17:39,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271618806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:39,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683094228] [2022-01-18 15:17:39,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:39,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:39,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:39,063 INFO L229 MonitoredProcess]: Starting monitored process 488 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:39,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Waiting until timeout for monitored process [2022-01-18 15:17:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:39,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:39,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:39,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:39,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:39,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:39,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:39,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:39,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:17:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:39,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:39,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:39,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:39,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:39,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:39,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:39,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:39,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683094228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:39,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:39,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:17:39,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244274706] [2022-01-18 15:17:39,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:39,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:39,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:39,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:39,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:39,544 INFO L87 Difference]: Start difference. First operand 761 states and 2520 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:39,988 INFO L93 Difference]: Finished difference Result 1118 states and 3587 transitions. [2022-01-18 15:17:39,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:17:39,988 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:39,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:39,990 INFO L225 Difference]: With dead ends: 1118 [2022-01-18 15:17:39,990 INFO L226 Difference]: Without dead ends: 1091 [2022-01-18 15:17:39,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:17:39,990 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:39,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 248 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 726 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2022-01-18 15:17:39,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2022-01-18 15:17:39,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 761. [2022-01-18 15:17:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.3131578947368423) internal successors, (2518), 760 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2518 transitions. [2022-01-18 15:17:39,999 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2518 transitions. Word has length 21 [2022-01-18 15:17:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:39,999 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2518 transitions. [2022-01-18 15:17:39,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:39,999 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2518 transitions. [2022-01-18 15:17:40,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:40,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:40,000 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:40,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Ended with exit code 0 [2022-01-18 15:17:40,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2022-01-18 15:17:40,201 INFO L402 AbstractCegarLoop]: === Iteration 500 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:40,201 INFO L85 PathProgramCache]: Analyzing trace with hash -505783023, now seen corresponding path program 488 times [2022-01-18 15:17:40,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:40,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507201602] [2022-01-18 15:17:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:40,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:40,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:40,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507201602] [2022-01-18 15:17:40,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507201602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:40,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535632699] [2022-01-18 15:17:40,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:40,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:40,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:40,329 INFO L229 MonitoredProcess]: Starting monitored process 489 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:40,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Waiting until timeout for monitored process [2022-01-18 15:17:40,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:40,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:40,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:40,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:40,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:40,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:40,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:40,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:40,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:40,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:40,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:40,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:40,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:40,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:40,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:40,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:40,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:40,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535632699] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:40,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:40,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:40,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696294986] [2022-01-18 15:17:40,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:40,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:40,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:40,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:40,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:40,823 INFO L87 Difference]: Start difference. First operand 761 states and 2518 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:41,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:41,357 INFO L93 Difference]: Finished difference Result 1142 states and 3651 transitions. [2022-01-18 15:17:41,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:17:41,358 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:41,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:41,359 INFO L225 Difference]: With dead ends: 1142 [2022-01-18 15:17:41,359 INFO L226 Difference]: Without dead ends: 1121 [2022-01-18 15:17:41,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:17:41,360 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 77 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:41,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 228 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 666 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2022-01-18 15:17:41,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2022-01-18 15:17:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 759. [2022-01-18 15:17:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.3153034300791555) internal successors, (2513), 758 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:41,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2513 transitions. [2022-01-18 15:17:41,369 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2513 transitions. Word has length 21 [2022-01-18 15:17:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:41,369 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2513 transitions. [2022-01-18 15:17:41,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2513 transitions. [2022-01-18 15:17:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:41,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:41,370 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:41,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Ended with exit code 0 [2022-01-18 15:17:41,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2022-01-18 15:17:41,570 INFO L402 AbstractCegarLoop]: === Iteration 501 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:41,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:41,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1452173671, now seen corresponding path program 489 times [2022-01-18 15:17:41,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:41,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734769419] [2022-01-18 15:17:41,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:41,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:41,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:41,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734769419] [2022-01-18 15:17:41,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734769419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:41,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599823331] [2022-01-18 15:17:41,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:41,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:41,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:41,676 INFO L229 MonitoredProcess]: Starting monitored process 490 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:41,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Waiting until timeout for monitored process [2022-01-18 15:17:41,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:17:41,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:41,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:41,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:41,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:41,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:41,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:41,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:41,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:41,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:17:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:41,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:41,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:41,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:42,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:42,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:42,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:42,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:42,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599823331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:42,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:42,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:17:42,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734902674] [2022-01-18 15:17:42,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:42,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:17:42,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:42,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:17:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:42,070 INFO L87 Difference]: Start difference. First operand 759 states and 2513 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:42,208 INFO L93 Difference]: Finished difference Result 851 states and 2787 transitions. [2022-01-18 15:17:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:42,208 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:42,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:42,209 INFO L225 Difference]: With dead ends: 851 [2022-01-18 15:17:42,209 INFO L226 Difference]: Without dead ends: 829 [2022-01-18 15:17:42,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:42,209 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:42,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 113 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 383 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-01-18 15:17:42,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-18 15:17:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 760. [2022-01-18 15:17:42,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.3175230566534912) internal successors, (2518), 759 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2518 transitions. [2022-01-18 15:17:42,217 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2518 transitions. Word has length 21 [2022-01-18 15:17:42,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:42,217 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2518 transitions. [2022-01-18 15:17:42,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:42,217 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2518 transitions. [2022-01-18 15:17:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:42,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:42,218 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:42,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Ended with exit code 0 [2022-01-18 15:17:42,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,490 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:42,419 INFO L402 AbstractCegarLoop]: === Iteration 502 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:42,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2065909369, now seen corresponding path program 490 times [2022-01-18 15:17:42,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:42,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796923974] [2022-01-18 15:17:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:42,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:42,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:42,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796923974] [2022-01-18 15:17:42,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796923974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:42,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963425860] [2022-01-18 15:17:42,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:42,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:42,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:42,522 INFO L229 MonitoredProcess]: Starting monitored process 491 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:42,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Waiting until timeout for monitored process [2022-01-18 15:17:42,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:42,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:42,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:42,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:42,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:42,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:42,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:42,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:42,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:42,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:17:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:42,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:42,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:42,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:42,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:42,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:42,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:42,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:42,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963425860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:42,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:42,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:17:42,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652622334] [2022-01-18 15:17:42,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:42,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:42,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:42,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:42,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:42,952 INFO L87 Difference]: Start difference. First operand 760 states and 2518 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:43,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:43,109 INFO L93 Difference]: Finished difference Result 857 states and 2784 transitions. [2022-01-18 15:17:43,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:43,110 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:43,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:43,111 INFO L225 Difference]: With dead ends: 857 [2022-01-18 15:17:43,111 INFO L226 Difference]: Without dead ends: 835 [2022-01-18 15:17:43,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:43,111 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:43,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 164 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 441 Invalid, 0 Unknown, 192 Unchecked, 0.1s Time] [2022-01-18 15:17:43,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-01-18 15:17:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 759. [2022-01-18 15:17:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.3153034300791555) internal successors, (2513), 758 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:43,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2513 transitions. [2022-01-18 15:17:43,119 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2513 transitions. Word has length 21 [2022-01-18 15:17:43,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:43,119 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2513 transitions. [2022-01-18 15:17:43,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2513 transitions. [2022-01-18 15:17:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:43,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:43,120 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:43,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Ended with exit code 0 [2022-01-18 15:17:43,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 491 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2022-01-18 15:17:43,320 INFO L402 AbstractCegarLoop]: === Iteration 503 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:43,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:43,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1188453392, now seen corresponding path program 491 times [2022-01-18 15:17:43,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:43,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016106414] [2022-01-18 15:17:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:43,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:43,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:43,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016106414] [2022-01-18 15:17:43,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016106414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:43,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618555700] [2022-01-18 15:17:43,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:43,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:43,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:43,452 INFO L229 MonitoredProcess]: Starting monitored process 492 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:43,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Waiting until timeout for monitored process [2022-01-18 15:17:43,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:43,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:43,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:43,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:43,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:43,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:43,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:43,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:43,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:43,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:17:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:43,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:43,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:43,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:43,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:43,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:43,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:43,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:43,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618555700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:43,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:43,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:43,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760917087] [2022-01-18 15:17:43,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:43,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:43,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:43,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:43,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:43,920 INFO L87 Difference]: Start difference. First operand 759 states and 2513 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:44,473 INFO L93 Difference]: Finished difference Result 1244 states and 3904 transitions. [2022-01-18 15:17:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:17:44,473 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:44,475 INFO L225 Difference]: With dead ends: 1244 [2022-01-18 15:17:44,475 INFO L226 Difference]: Without dead ends: 1198 [2022-01-18 15:17:44,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:17:44,475 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 109 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:44,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 247 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 748 Invalid, 0 Unknown, 8 Unchecked, 0.3s Time] [2022-01-18 15:17:44,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-01-18 15:17:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 761. [2022-01-18 15:17:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.3157894736842106) internal successors, (2520), 760 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:44,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2520 transitions. [2022-01-18 15:17:44,485 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2520 transitions. Word has length 21 [2022-01-18 15:17:44,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:44,485 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2520 transitions. [2022-01-18 15:17:44,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:44,485 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2520 transitions. [2022-01-18 15:17:44,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:44,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:44,486 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:44,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:44,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2022-01-18 15:17:44,686 INFO L402 AbstractCegarLoop]: === Iteration 504 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:44,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:44,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1791694389, now seen corresponding path program 492 times [2022-01-18 15:17:44,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:44,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672400229] [2022-01-18 15:17:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:44,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:44,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:44,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672400229] [2022-01-18 15:17:44,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672400229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:44,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67261337] [2022-01-18 15:17:44,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:44,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:44,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:44,820 INFO L229 MonitoredProcess]: Starting monitored process 493 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:44,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Waiting until timeout for monitored process [2022-01-18 15:17:44,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:17:44,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:44,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:44,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:44,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:44,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:44,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:44,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:44,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:44,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:45,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:45,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:45,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:45,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:45,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:45,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:45,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:45,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67261337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:45,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:45,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:17:45,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624787805] [2022-01-18 15:17:45,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:45,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:45,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:45,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:45,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:45,278 INFO L87 Difference]: Start difference. First operand 761 states and 2520 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:45,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:45,978 INFO L93 Difference]: Finished difference Result 1238 states and 3922 transitions. [2022-01-18 15:17:45,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:17:45,979 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:45,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:45,980 INFO L225 Difference]: With dead ends: 1238 [2022-01-18 15:17:45,980 INFO L226 Difference]: Without dead ends: 1211 [2022-01-18 15:17:45,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:17:45,981 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 97 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:45,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 288 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 869 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-01-18 15:17:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-01-18 15:17:45,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 762. [2022-01-18 15:17:45,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.319316688567674) internal successors, (2526), 761 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:45,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2526 transitions. [2022-01-18 15:17:45,991 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2526 transitions. Word has length 21 [2022-01-18 15:17:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:45,991 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 2526 transitions. [2022-01-18 15:17:45,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2526 transitions. [2022-01-18 15:17:45,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:45,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:45,992 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:46,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:46,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2022-01-18 15:17:46,192 INFO L402 AbstractCegarLoop]: === Iteration 505 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:46,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1348663517, now seen corresponding path program 493 times [2022-01-18 15:17:46,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:46,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082956974] [2022-01-18 15:17:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:46,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:46,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:46,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082956974] [2022-01-18 15:17:46,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082956974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:46,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759939682] [2022-01-18 15:17:46,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:46,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:46,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:46,302 INFO L229 MonitoredProcess]: Starting monitored process 494 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:46,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Waiting until timeout for monitored process [2022-01-18 15:17:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:46,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:46,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:46,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:46,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:46,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:46,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:46,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:46,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:46,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:46,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:46,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:46,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:46,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:46,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:46,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:46,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759939682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:46,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:46,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:17:46,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505470468] [2022-01-18 15:17:46,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:46,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:17:46,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:17:46,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:46,685 INFO L87 Difference]: Start difference. First operand 762 states and 2526 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:46,862 INFO L93 Difference]: Finished difference Result 882 states and 2875 transitions. [2022-01-18 15:17:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:17:46,862 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:46,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:46,863 INFO L225 Difference]: With dead ends: 882 [2022-01-18 15:17:46,863 INFO L226 Difference]: Without dead ends: 853 [2022-01-18 15:17:46,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:46,863 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:46,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 143 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 494 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-18 15:17:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-01-18 15:17:46,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 761. [2022-01-18 15:17:46,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.3157894736842106) internal successors, (2520), 760 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:46,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2520 transitions. [2022-01-18 15:17:46,871 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2520 transitions. Word has length 21 [2022-01-18 15:17:46,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:46,872 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2520 transitions. [2022-01-18 15:17:46,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:46,872 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2520 transitions. [2022-01-18 15:17:46,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:46,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:46,872 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:46,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Ended with exit code 0 [2022-01-18 15:17:47,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,494 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:47,073 INFO L402 AbstractCegarLoop]: === Iteration 506 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:47,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1781861515, now seen corresponding path program 494 times [2022-01-18 15:17:47,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:47,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428263525] [2022-01-18 15:17:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:47,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:47,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:47,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428263525] [2022-01-18 15:17:47,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428263525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:47,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660814411] [2022-01-18 15:17:47,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:47,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:47,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:47,178 INFO L229 MonitoredProcess]: Starting monitored process 495 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:47,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Waiting until timeout for monitored process [2022-01-18 15:17:47,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:47,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:47,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:47,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:47,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:47,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:47,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:47,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:47,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:47,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:17:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:47,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:47,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:47,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:47,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:47,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:47,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:47,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:47,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660814411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:47,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:47,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:17:47,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692696884] [2022-01-18 15:17:47,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:47,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:47,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:47,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:47,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:47,620 INFO L87 Difference]: Start difference. First operand 761 states and 2520 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:47,767 INFO L93 Difference]: Finished difference Result 874 states and 2824 transitions. [2022-01-18 15:17:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:17:47,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:47,769 INFO L225 Difference]: With dead ends: 874 [2022-01-18 15:17:47,769 INFO L226 Difference]: Without dead ends: 852 [2022-01-18 15:17:47,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:47,769 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:47,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 133 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 331 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2022-01-18 15:17:47,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-01-18 15:17:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 761. [2022-01-18 15:17:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.3157894736842106) internal successors, (2520), 760 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2520 transitions. [2022-01-18 15:17:47,777 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2520 transitions. Word has length 21 [2022-01-18 15:17:47,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:47,777 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2520 transitions. [2022-01-18 15:17:47,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2520 transitions. [2022-01-18 15:17:47,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:47,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:47,778 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:47,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Ended with exit code 0 [2022-01-18 15:17:47,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2022-01-18 15:17:47,978 INFO L402 AbstractCegarLoop]: === Iteration 507 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:47,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1678482751, now seen corresponding path program 495 times [2022-01-18 15:17:47,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:47,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508539433] [2022-01-18 15:17:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:47,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:48,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:48,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508539433] [2022-01-18 15:17:48,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508539433] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:48,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987447377] [2022-01-18 15:17:48,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:48,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:48,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:48,085 INFO L229 MonitoredProcess]: Starting monitored process 496 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:48,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Waiting until timeout for monitored process [2022-01-18 15:17:48,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:17:48,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:48,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:48,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:48,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:48,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:48,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:48,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:48,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:48,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:48,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:48,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:48,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:48,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:48,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:48,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:48,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:48,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987447377] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:48,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:48,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:17:48,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600942109] [2022-01-18 15:17:48,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:48,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:17:48,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:48,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:17:48,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:48,522 INFO L87 Difference]: Start difference. First operand 761 states and 2520 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:48,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:48,721 INFO L93 Difference]: Finished difference Result 888 states and 2867 transitions. [2022-01-18 15:17:48,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:17:48,721 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:48,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:48,723 INFO L225 Difference]: With dead ends: 888 [2022-01-18 15:17:48,723 INFO L226 Difference]: Without dead ends: 859 [2022-01-18 15:17:48,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:17:48,723 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:48,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 199 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 560 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-01-18 15:17:48,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-18 15:17:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 759. [2022-01-18 15:17:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.3153034300791555) internal successors, (2513), 758 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:48,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2513 transitions. [2022-01-18 15:17:48,731 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2513 transitions. Word has length 21 [2022-01-18 15:17:48,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:48,731 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2513 transitions. [2022-01-18 15:17:48,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:48,731 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2513 transitions. [2022-01-18 15:17:48,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:48,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:48,732 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:48,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Forceful destruction successful, exit code 0 [2022-01-18 15:17:48,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,496 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:48,932 INFO L402 AbstractCegarLoop]: === Iteration 508 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:48,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1609177592, now seen corresponding path program 496 times [2022-01-18 15:17:48,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:48,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977174855] [2022-01-18 15:17:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:48,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:49,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:49,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977174855] [2022-01-18 15:17:49,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977174855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:49,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611945629] [2022-01-18 15:17:49,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:49,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:49,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:49,074 INFO L229 MonitoredProcess]: Starting monitored process 497 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:49,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Waiting until timeout for monitored process [2022-01-18 15:17:49,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:49,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:49,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:49,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:49,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:49,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:49,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:49,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:49,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:49,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:17:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:49,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:49,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:49,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:49,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:49,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:49,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:49,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:49,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611945629] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:49,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:49,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:49,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821141394] [2022-01-18 15:17:49,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:49,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:49,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:49,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:49,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:49,561 INFO L87 Difference]: Start difference. First operand 759 states and 2513 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:50,111 INFO L93 Difference]: Finished difference Result 1183 states and 3748 transitions. [2022-01-18 15:17:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:17:50,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:50,113 INFO L225 Difference]: With dead ends: 1183 [2022-01-18 15:17:50,113 INFO L226 Difference]: Without dead ends: 1164 [2022-01-18 15:17:50,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:17:50,114 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 92 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:50,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 312 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 901 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2022-01-18 15:17:50,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-01-18 15:17:50,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 757. [2022-01-18 15:17:50,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.3174603174603177) internal successors, (2508), 756 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:50,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2508 transitions. [2022-01-18 15:17:50,124 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2508 transitions. Word has length 21 [2022-01-18 15:17:50,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:50,124 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2508 transitions. [2022-01-18 15:17:50,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2508 transitions. [2022-01-18 15:17:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:50,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:50,125 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:50,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Ended with exit code 0 [2022-01-18 15:17:50,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2022-01-18 15:17:50,326 INFO L402 AbstractCegarLoop]: === Iteration 509 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:50,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:50,326 INFO L85 PathProgramCache]: Analyzing trace with hash -278561643, now seen corresponding path program 497 times [2022-01-18 15:17:50,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:50,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702917664] [2022-01-18 15:17:50,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:50,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:50,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:50,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702917664] [2022-01-18 15:17:50,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702917664] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:50,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495266518] [2022-01-18 15:17:50,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:50,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:50,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:50,426 INFO L229 MonitoredProcess]: Starting monitored process 498 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:50,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Waiting until timeout for monitored process [2022-01-18 15:17:50,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:17:50,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:50,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:50,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:50,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:50,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:50,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:50,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:50,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:50,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:50,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:50,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:50,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:50,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:50,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:50,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:50,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:50,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495266518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:50,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:50,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:17:50,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205167118] [2022-01-18 15:17:50,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:50,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:50,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:50,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:50,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:50,891 INFO L87 Difference]: Start difference. First operand 757 states and 2508 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:51,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:51,240 INFO L93 Difference]: Finished difference Result 1065 states and 3431 transitions. [2022-01-18 15:17:51,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:17:51,240 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:51,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:51,241 INFO L225 Difference]: With dead ends: 1065 [2022-01-18 15:17:51,241 INFO L226 Difference]: Without dead ends: 1044 [2022-01-18 15:17:51,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:17:51,242 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:51,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 196 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 562 Invalid, 0 Unknown, 140 Unchecked, 0.2s Time] [2022-01-18 15:17:51,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-01-18 15:17:51,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 758. [2022-01-18 15:17:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.319682959048877) internal successors, (2513), 757 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2513 transitions. [2022-01-18 15:17:51,250 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2513 transitions. Word has length 21 [2022-01-18 15:17:51,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:51,250 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2513 transitions. [2022-01-18 15:17:51,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2513 transitions. [2022-01-18 15:17:51,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:51,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:51,251 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:51,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Ended with exit code 0 [2022-01-18 15:17:51,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,498 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:51,452 INFO L402 AbstractCegarLoop]: === Iteration 510 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:51,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:51,452 INFO L85 PathProgramCache]: Analyzing trace with hash 317544273, now seen corresponding path program 498 times [2022-01-18 15:17:51,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:51,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766402596] [2022-01-18 15:17:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:51,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:51,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:51,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766402596] [2022-01-18 15:17:51,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766402596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:51,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174544012] [2022-01-18 15:17:51,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:51,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:51,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:51,596 INFO L229 MonitoredProcess]: Starting monitored process 499 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:51,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Waiting until timeout for monitored process [2022-01-18 15:17:51,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:17:51,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:51,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:51,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:51,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:51,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:51,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:51,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:51,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:51,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:51,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:51,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:51,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:51,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:51,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:51,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:51,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:52,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174544012] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:52,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:52,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:52,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470234468] [2022-01-18 15:17:52,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:52,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:52,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:52,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:52,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:52,053 INFO L87 Difference]: Start difference. First operand 758 states and 2513 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:52,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:52,422 INFO L93 Difference]: Finished difference Result 1095 states and 3514 transitions. [2022-01-18 15:17:52,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:17:52,422 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:52,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:52,423 INFO L225 Difference]: With dead ends: 1095 [2022-01-18 15:17:52,423 INFO L226 Difference]: Without dead ends: 1074 [2022-01-18 15:17:52,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:17:52,424 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 88 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:52,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 163 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 503 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-01-18 15:17:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-01-18 15:17:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 758. [2022-01-18 15:17:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.319682959048877) internal successors, (2513), 757 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2513 transitions. [2022-01-18 15:17:52,432 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2513 transitions. Word has length 21 [2022-01-18 15:17:52,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:52,433 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2513 transitions. [2022-01-18 15:17:52,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2513 transitions. [2022-01-18 15:17:52,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:52,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:52,433 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:52,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Ended with exit code 0 [2022-01-18 15:17:52,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,499 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:52,634 INFO L402 AbstractCegarLoop]: === Iteration 511 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:52,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:52,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1832105461, now seen corresponding path program 499 times [2022-01-18 15:17:52,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:52,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762103440] [2022-01-18 15:17:52,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:52,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:52,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:52,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762103440] [2022-01-18 15:17:52,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762103440] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:52,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240120] [2022-01-18 15:17:52,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:52,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:52,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:52,770 INFO L229 MonitoredProcess]: Starting monitored process 500 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:52,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Waiting until timeout for monitored process [2022-01-18 15:17:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:52,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:52,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:52,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:52,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:52,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:52,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:52,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:52,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:52,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:53,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:53,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:53,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:53,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:17:53,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:53,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:53,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240120] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:53,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:53,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:53,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521025379] [2022-01-18 15:17:53,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:53,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:53,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:53,240 INFO L87 Difference]: Start difference. First operand 758 states and 2513 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:53,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:53,623 INFO L93 Difference]: Finished difference Result 1094 states and 3502 transitions. [2022-01-18 15:17:53,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:17:53,623 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:53,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:53,625 INFO L225 Difference]: With dead ends: 1094 [2022-01-18 15:17:53,625 INFO L226 Difference]: Without dead ends: 1079 [2022-01-18 15:17:53,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:17:53,625 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:53,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 207 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 557 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-01-18 15:17:53,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2022-01-18 15:17:53,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 756. [2022-01-18 15:17:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.3152317880794704) internal successors, (2503), 755 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2503 transitions. [2022-01-18 15:17:53,635 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2503 transitions. Word has length 21 [2022-01-18 15:17:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:53,635 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 2503 transitions. [2022-01-18 15:17:53,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:53,635 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2503 transitions. [2022-01-18 15:17:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:53,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:53,636 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:53,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Ended with exit code 0 [2022-01-18 15:17:53,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2022-01-18 15:17:53,836 INFO L402 AbstractCegarLoop]: === Iteration 512 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:53,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:53,836 INFO L85 PathProgramCache]: Analyzing trace with hash 2081948580, now seen corresponding path program 500 times [2022-01-18 15:17:53,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:53,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60519971] [2022-01-18 15:17:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:53,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:53,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:53,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60519971] [2022-01-18 15:17:53,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60519971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:53,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301949038] [2022-01-18 15:17:53,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:17:53,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:53,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:53,945 INFO L229 MonitoredProcess]: Starting monitored process 501 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:53,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Waiting until timeout for monitored process [2022-01-18 15:17:53,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:17:53,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:53,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:53,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:54,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:54,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:54,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:54,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:54,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:54,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:54,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:54,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:54,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:54,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:54,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:17:54,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:54,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:17:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:54,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301949038] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:54,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:54,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:17:54,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719431618] [2022-01-18 15:17:54,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:54,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:54,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:54,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:54,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:54,448 INFO L87 Difference]: Start difference. First operand 756 states and 2503 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:54,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:54,777 INFO L93 Difference]: Finished difference Result 1012 states and 3271 transitions. [2022-01-18 15:17:54,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:17:54,778 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:54,779 INFO L225 Difference]: With dead ends: 1012 [2022-01-18 15:17:54,779 INFO L226 Difference]: Without dead ends: 993 [2022-01-18 15:17:54,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:17:54,781 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:54,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 232 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 467 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2022-01-18 15:17:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-01-18 15:17:54,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 760. [2022-01-18 15:17:54,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.318840579710145) internal successors, (2519), 759 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2519 transitions. [2022-01-18 15:17:54,793 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2519 transitions. Word has length 21 [2022-01-18 15:17:54,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:54,793 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2519 transitions. [2022-01-18 15:17:54,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:54,793 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2519 transitions. [2022-01-18 15:17:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:54,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:54,794 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:54,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Ended with exit code 0 [2022-01-18 15:17:54,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2022-01-18 15:17:54,994 INFO L402 AbstractCegarLoop]: === Iteration 513 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:54,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:54,995 INFO L85 PathProgramCache]: Analyzing trace with hash -692416993, now seen corresponding path program 501 times [2022-01-18 15:17:54,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:54,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449199777] [2022-01-18 15:17:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:54,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:55,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:55,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449199777] [2022-01-18 15:17:55,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449199777] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:55,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010300897] [2022-01-18 15:17:55,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:17:55,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:55,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:55,128 INFO L229 MonitoredProcess]: Starting monitored process 502 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:55,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Waiting until timeout for monitored process [2022-01-18 15:17:55,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:17:55,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:55,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:55,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:55,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:55,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:55,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:55,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:55,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:55,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:17:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:55,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:55,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:55,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:17:55,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:55,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:17:55,601 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:55,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:17:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:55,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010300897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:55,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:55,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:17:55,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848837557] [2022-01-18 15:17:55,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:55,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:17:55,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:55,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:17:55,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:17:55,649 INFO L87 Difference]: Start difference. First operand 760 states and 2519 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:56,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:56,060 INFO L93 Difference]: Finished difference Result 1112 states and 3535 transitions. [2022-01-18 15:17:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:17:56,061 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:56,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:56,062 INFO L225 Difference]: With dead ends: 1112 [2022-01-18 15:17:56,062 INFO L226 Difference]: Without dead ends: 1052 [2022-01-18 15:17:56,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:17:56,063 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 76 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:56,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 277 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 667 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2022-01-18 15:17:56,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-01-18 15:17:56,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 760. [2022-01-18 15:17:56,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.316205533596838) internal successors, (2517), 759 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2517 transitions. [2022-01-18 15:17:56,072 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2517 transitions. Word has length 21 [2022-01-18 15:17:56,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:56,072 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2517 transitions. [2022-01-18 15:17:56,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:56,072 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2517 transitions. [2022-01-18 15:17:56,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:56,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:56,073 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:56,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Ended with exit code 0 [2022-01-18 15:17:56,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2022-01-18 15:17:56,274 INFO L402 AbstractCegarLoop]: === Iteration 514 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:56,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1083885380, now seen corresponding path program 502 times [2022-01-18 15:17:56,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:56,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700922931] [2022-01-18 15:17:56,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:56,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:56,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:56,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700922931] [2022-01-18 15:17:56,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700922931] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:56,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692928920] [2022-01-18 15:17:56,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:17:56,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:56,380 INFO L229 MonitoredProcess]: Starting monitored process 503 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:56,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Waiting until timeout for monitored process [2022-01-18 15:17:56,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:17:56,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:56,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:56,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:56,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:56,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:56,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:56,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:17:56,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:56,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:17:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:56,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:56,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:56,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:56,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:56,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:17:56,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:56,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:17:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:56,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692928920] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:56,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:56,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:17:56,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833918589] [2022-01-18 15:17:56,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:56,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:56,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:56,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:56,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:56,848 INFO L87 Difference]: Start difference. First operand 760 states and 2517 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:57,173 INFO L93 Difference]: Finished difference Result 1055 states and 3394 transitions. [2022-01-18 15:17:57,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:17:57,174 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:57,175 INFO L225 Difference]: With dead ends: 1055 [2022-01-18 15:17:57,175 INFO L226 Difference]: Without dead ends: 1032 [2022-01-18 15:17:57,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:17:57,175 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:57,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 235 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 599 Invalid, 0 Unknown, 214 Unchecked, 0.2s Time] [2022-01-18 15:17:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-01-18 15:17:57,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 758. [2022-01-18 15:17:57,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.3183619550858654) internal successors, (2512), 757 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2512 transitions. [2022-01-18 15:17:57,184 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2512 transitions. Word has length 21 [2022-01-18 15:17:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:57,184 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2512 transitions. [2022-01-18 15:17:57,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:57,184 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2512 transitions. [2022-01-18 15:17:57,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:57,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:57,185 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:57,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Ended with exit code 0 [2022-01-18 15:17:57,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,503 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:57,386 INFO L402 AbstractCegarLoop]: === Iteration 515 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:57,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:57,386 INFO L85 PathProgramCache]: Analyzing trace with hash 740735729, now seen corresponding path program 503 times [2022-01-18 15:17:57,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:57,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428238508] [2022-01-18 15:17:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:57,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:57,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:57,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428238508] [2022-01-18 15:17:57,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428238508] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:57,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709957432] [2022-01-18 15:17:57,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:17:57,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:57,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:57,487 INFO L229 MonitoredProcess]: Starting monitored process 504 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:57,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Waiting until timeout for monitored process [2022-01-18 15:17:57,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:17:57,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:57,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:57,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:57,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:57,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:57,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:57,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:57,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:57,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:17:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:57,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:57,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:57,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:17:57,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:57,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:17:57,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:57,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:17:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:57,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709957432] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:57,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:57,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:17:57,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978121948] [2022-01-18 15:17:57,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:57,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:17:57,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:57,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:17:57,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:57,908 INFO L87 Difference]: Start difference. First operand 758 states and 2512 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:58,036 INFO L93 Difference]: Finished difference Result 861 states and 2797 transitions. [2022-01-18 15:17:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:17:58,037 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:58,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:58,038 INFO L225 Difference]: With dead ends: 861 [2022-01-18 15:17:58,038 INFO L226 Difference]: Without dead ends: 817 [2022-01-18 15:17:58,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:17:58,038 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:58,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 144 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 355 Invalid, 0 Unknown, 261 Unchecked, 0.1s Time] [2022-01-18 15:17:58,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-01-18 15:17:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 758. [2022-01-18 15:17:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.3183619550858654) internal successors, (2512), 757 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:58,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2512 transitions. [2022-01-18 15:17:58,046 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2512 transitions. Word has length 21 [2022-01-18 15:17:58,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:58,046 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2512 transitions. [2022-01-18 15:17:58,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:58,046 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2512 transitions. [2022-01-18 15:17:58,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:58,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:58,047 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:58,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Ended with exit code 0 [2022-01-18 15:17:58,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,504 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:58,247 INFO L402 AbstractCegarLoop]: === Iteration 516 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:58,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:58,247 INFO L85 PathProgramCache]: Analyzing trace with hash -913604504, now seen corresponding path program 504 times [2022-01-18 15:17:58,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:58,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241855409] [2022-01-18 15:17:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:58,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:58,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:58,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241855409] [2022-01-18 15:17:58,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241855409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:58,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989786940] [2022-01-18 15:17:58,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:17:58,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:58,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:58,372 INFO L229 MonitoredProcess]: Starting monitored process 505 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:58,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Waiting until timeout for monitored process [2022-01-18 15:17:58,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:17:58,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:17:58,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:58,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:58,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:58,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:58,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:58,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:58,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:58,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:58,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:58,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:58,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:17:58,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:58,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:17:58,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:58,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:17:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:58,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989786940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:17:58,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:17:58,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:17:58,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412016537] [2022-01-18 15:17:58,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:17:58,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:17:58,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:17:58,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:17:58,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:17:58,848 INFO L87 Difference]: Start difference. First operand 758 states and 2512 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:17:59,268 INFO L93 Difference]: Finished difference Result 1003 states and 3243 transitions. [2022-01-18 15:17:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:17:59,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:17:59,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:17:59,270 INFO L225 Difference]: With dead ends: 1003 [2022-01-18 15:17:59,270 INFO L226 Difference]: Without dead ends: 984 [2022-01-18 15:17:59,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:17:59,270 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:17:59,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 275 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 649 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-01-18 15:17:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-01-18 15:17:59,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 761. [2022-01-18 15:17:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.3210526315789473) internal successors, (2524), 760 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2524 transitions. [2022-01-18 15:17:59,279 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2524 transitions. Word has length 21 [2022-01-18 15:17:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:17:59,279 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2524 transitions. [2022-01-18 15:17:59,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:17:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2524 transitions. [2022-01-18 15:17:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:17:59,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:17:59,280 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:17:59,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Ended with exit code 0 [2022-01-18 15:17:59,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,505 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:59,480 INFO L402 AbstractCegarLoop]: === Iteration 517 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:17:59,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:17:59,481 INFO L85 PathProgramCache]: Analyzing trace with hash 8097636, now seen corresponding path program 505 times [2022-01-18 15:17:59,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:17:59,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703918736] [2022-01-18 15:17:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:17:59,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:17:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:59,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:17:59,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703918736] [2022-01-18 15:17:59,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703918736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:17:59,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991160039] [2022-01-18 15:17:59,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:17:59,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:17:59,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:17:59,583 INFO L229 MonitoredProcess]: Starting monitored process 506 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:17:59,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Waiting until timeout for monitored process [2022-01-18 15:17:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:17:59,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:17:59,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:17:59,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:59,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:59,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:59,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:17:59,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:17:59,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:17:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:17:59,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:17:59,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:17:59,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:18:00,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:00,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:00,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:00,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:00,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991160039] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:00,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:00,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:18:00,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568931951] [2022-01-18 15:18:00,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:00,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:00,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:00,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:00,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:00,065 INFO L87 Difference]: Start difference. First operand 761 states and 2524 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:00,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:00,398 INFO L93 Difference]: Finished difference Result 1058 states and 3419 transitions. [2022-01-18 15:18:00,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:18:00,398 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:00,400 INFO L225 Difference]: With dead ends: 1058 [2022-01-18 15:18:00,400 INFO L226 Difference]: Without dead ends: 1043 [2022-01-18 15:18:00,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:18:00,400 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:00,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 227 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 444 Invalid, 0 Unknown, 166 Unchecked, 0.2s Time] [2022-01-18 15:18:00,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-01-18 15:18:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 761. [2022-01-18 15:18:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.3210526315789473) internal successors, (2524), 760 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2524 transitions. [2022-01-18 15:18:00,409 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2524 transitions. Word has length 21 [2022-01-18 15:18:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:00,409 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2524 transitions. [2022-01-18 15:18:00,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2524 transitions. [2022-01-18 15:18:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:00,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:00,410 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:00,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:00,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,506 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:00,617 INFO L402 AbstractCegarLoop]: === Iteration 518 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:00,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:00,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1334007848, now seen corresponding path program 506 times [2022-01-18 15:18:00,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:00,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720404041] [2022-01-18 15:18:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:00,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:00,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:00,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720404041] [2022-01-18 15:18:00,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720404041] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:00,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355432250] [2022-01-18 15:18:00,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:00,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:00,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:00,750 INFO L229 MonitoredProcess]: Starting monitored process 507 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:00,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Waiting until timeout for monitored process [2022-01-18 15:18:00,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:00,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:00,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:00,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:00,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:00,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:00,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:00,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:00,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:00,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:01,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:01,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:01,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:18:01,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:01,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:01,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:01,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:01,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355432250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:01,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:01,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:01,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086703005] [2022-01-18 15:18:01,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:01,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:01,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:01,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:01,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:01,239 INFO L87 Difference]: Start difference. First operand 761 states and 2524 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:01,671 INFO L93 Difference]: Finished difference Result 1000 states and 3241 transitions. [2022-01-18 15:18:01,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:18:01,671 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:01,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:01,673 INFO L225 Difference]: With dead ends: 1000 [2022-01-18 15:18:01,673 INFO L226 Difference]: Without dead ends: 981 [2022-01-18 15:18:01,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:18:01,673 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 75 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:01,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 266 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 764 Invalid, 0 Unknown, 288 Unchecked, 0.3s Time] [2022-01-18 15:18:01,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-01-18 15:18:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 761. [2022-01-18 15:18:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.3210526315789473) internal successors, (2524), 760 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2524 transitions. [2022-01-18 15:18:01,682 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2524 transitions. Word has length 21 [2022-01-18 15:18:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:01,682 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2524 transitions. [2022-01-18 15:18:01,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:01,682 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2524 transitions. [2022-01-18 15:18:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:01,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:01,683 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:01,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Ended with exit code 0 [2022-01-18 15:18:01,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2022-01-18 15:18:01,883 INFO L402 AbstractCegarLoop]: === Iteration 519 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:01,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:01,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2110545571, now seen corresponding path program 507 times [2022-01-18 15:18:01,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:01,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419140232] [2022-01-18 15:18:01,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:01,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:02,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:02,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419140232] [2022-01-18 15:18:02,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419140232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:02,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027203049] [2022-01-18 15:18:02,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:02,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:02,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:02,001 INFO L229 MonitoredProcess]: Starting monitored process 508 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:02,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Waiting until timeout for monitored process [2022-01-18 15:18:02,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:18:02,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:02,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:02,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:02,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:02,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:02,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:02,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:02,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:02,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:02,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:02,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:02,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:02,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:02,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:02,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:02,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:18:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:02,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027203049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:02,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:02,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:18:02,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450267737] [2022-01-18 15:18:02,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:02,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:02,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:02,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:02,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:02,500 INFO L87 Difference]: Start difference. First operand 761 states and 2524 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:02,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:02,784 INFO L93 Difference]: Finished difference Result 1025 states and 3312 transitions. [2022-01-18 15:18:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:18:02,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:02,786 INFO L225 Difference]: With dead ends: 1025 [2022-01-18 15:18:02,786 INFO L226 Difference]: Without dead ends: 992 [2022-01-18 15:18:02,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:02,786 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:02,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 180 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 513 Invalid, 0 Unknown, 115 Unchecked, 0.2s Time] [2022-01-18 15:18:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-01-18 15:18:02,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 763. [2022-01-18 15:18:02,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.320209973753281) internal successors, (2530), 762 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:02,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2530 transitions. [2022-01-18 15:18:02,795 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2530 transitions. Word has length 21 [2022-01-18 15:18:02,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:02,795 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2530 transitions. [2022-01-18 15:18:02,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2530 transitions. [2022-01-18 15:18:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:02,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:02,796 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:02,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Ended with exit code 0 [2022-01-18 15:18:02,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,508 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:02,997 INFO L402 AbstractCegarLoop]: === Iteration 520 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:02,997 INFO L85 PathProgramCache]: Analyzing trace with hash 747356381, now seen corresponding path program 508 times [2022-01-18 15:18:02,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:02,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354512383] [2022-01-18 15:18:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:02,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:03,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:03,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354512383] [2022-01-18 15:18:03,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354512383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:03,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339698593] [2022-01-18 15:18:03,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:03,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:03,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:03,103 INFO L229 MonitoredProcess]: Starting monitored process 509 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:03,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Waiting until timeout for monitored process [2022-01-18 15:18:03,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:03,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:03,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:03,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:03,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:03,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:03,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:03,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:03,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:03,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:18:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:03,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:03,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:03,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:18:03,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:03,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:03,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:03,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:03,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339698593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:03,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:03,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:03,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568151866] [2022-01-18 15:18:03,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:03,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:03,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:03,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:03,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:03,540 INFO L87 Difference]: Start difference. First operand 763 states and 2530 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:03,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:03,662 INFO L93 Difference]: Finished difference Result 857 states and 2791 transitions. [2022-01-18 15:18:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:18:03,663 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:03,664 INFO L225 Difference]: With dead ends: 857 [2022-01-18 15:18:03,664 INFO L226 Difference]: Without dead ends: 835 [2022-01-18 15:18:03,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:03,664 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:03,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 165 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 334 Invalid, 0 Unknown, 122 Unchecked, 0.1s Time] [2022-01-18 15:18:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-01-18 15:18:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 763. [2022-01-18 15:18:03,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.320209973753281) internal successors, (2530), 762 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:03,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2530 transitions. [2022-01-18 15:18:03,672 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2530 transitions. Word has length 21 [2022-01-18 15:18:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:03,672 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2530 transitions. [2022-01-18 15:18:03,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2530 transitions. [2022-01-18 15:18:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:03,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:03,673 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:03,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Ended with exit code 0 [2022-01-18 15:18:03,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,509 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:03,873 INFO L402 AbstractCegarLoop]: === Iteration 521 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:03,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:03,874 INFO L85 PathProgramCache]: Analyzing trace with hash 230489955, now seen corresponding path program 509 times [2022-01-18 15:18:03,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:03,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059571488] [2022-01-18 15:18:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:03,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:03,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:03,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059571488] [2022-01-18 15:18:03,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059571488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:03,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162153286] [2022-01-18 15:18:03,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:03,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:03,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:03,975 INFO L229 MonitoredProcess]: Starting monitored process 510 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:03,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Waiting until timeout for monitored process [2022-01-18 15:18:03,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:03,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:04,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:04,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:04,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:04,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:04,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:04,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:04,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:04,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:04,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:04,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:04,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:04,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:04,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:04,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:04,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:18:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:04,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162153286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:04,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:04,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:18:04,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426126048] [2022-01-18 15:18:04,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:04,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:04,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:04,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:04,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:04,487 INFO L87 Difference]: Start difference. First operand 763 states and 2530 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:04,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:04,778 INFO L93 Difference]: Finished difference Result 1005 states and 3260 transitions. [2022-01-18 15:18:04,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:18:04,779 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:04,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:04,780 INFO L225 Difference]: With dead ends: 1005 [2022-01-18 15:18:04,780 INFO L226 Difference]: Without dead ends: 992 [2022-01-18 15:18:04,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:04,780 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:04,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 170 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 547 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-01-18 15:18:04,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-01-18 15:18:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 764. [2022-01-18 15:18:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.3184796854521625) internal successors, (2532), 763 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2532 transitions. [2022-01-18 15:18:04,789 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2532 transitions. Word has length 21 [2022-01-18 15:18:04,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:04,789 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 2532 transitions. [2022-01-18 15:18:04,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:04,789 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2532 transitions. [2022-01-18 15:18:04,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:04,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:04,790 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:04,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Ended with exit code 0 [2022-01-18 15:18:04,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2022-01-18 15:18:04,991 INFO L402 AbstractCegarLoop]: === Iteration 522 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:04,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:04,991 INFO L85 PathProgramCache]: Analyzing trace with hash -521964837, now seen corresponding path program 510 times [2022-01-18 15:18:04,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:04,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97145347] [2022-01-18 15:18:04,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:04,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:05,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:05,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97145347] [2022-01-18 15:18:05,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97145347] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:05,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663672884] [2022-01-18 15:18:05,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:05,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:05,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:05,095 INFO L229 MonitoredProcess]: Starting monitored process 511 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:05,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Waiting until timeout for monitored process [2022-01-18 15:18:05,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:18:05,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:05,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:05,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:05,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:05,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:05,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:05,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:05,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:05,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:18:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:05,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:05,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:05,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:18:05,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:05,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:05,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:05,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:05,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663672884] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:05,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:05,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:05,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708433723] [2022-01-18 15:18:05,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:05,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:05,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:05,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:05,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:05,560 INFO L87 Difference]: Start difference. First operand 764 states and 2532 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:05,724 INFO L93 Difference]: Finished difference Result 858 states and 2781 transitions. [2022-01-18 15:18:05,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:18:05,724 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:05,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:05,725 INFO L225 Difference]: With dead ends: 858 [2022-01-18 15:18:05,726 INFO L226 Difference]: Without dead ends: 848 [2022-01-18 15:18:05,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:05,726 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:05,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 179 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 459 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-01-18 15:18:05,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-01-18 15:18:05,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 764. [2022-01-18 15:18:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.3184796854521625) internal successors, (2532), 763 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:05,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2532 transitions. [2022-01-18 15:18:05,734 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2532 transitions. Word has length 21 [2022-01-18 15:18:05,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:05,734 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 2532 transitions. [2022-01-18 15:18:05,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:05,734 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2532 transitions. [2022-01-18 15:18:05,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:05,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:05,735 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:05,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Ended with exit code 0 [2022-01-18 15:18:05,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2022-01-18 15:18:05,935 INFO L402 AbstractCegarLoop]: === Iteration 523 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:05,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:05,935 INFO L85 PathProgramCache]: Analyzing trace with hash 264089183, now seen corresponding path program 511 times [2022-01-18 15:18:05,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:05,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758130075] [2022-01-18 15:18:05,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:05,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:06,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:06,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758130075] [2022-01-18 15:18:06,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758130075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:06,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105026474] [2022-01-18 15:18:06,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:06,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:06,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:06,065 INFO L229 MonitoredProcess]: Starting monitored process 512 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:06,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Waiting until timeout for monitored process [2022-01-18 15:18:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:06,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:06,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:06,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:06,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:06,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:06,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:06,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:06,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:06,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:06,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:06,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:06,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:06,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:18:06,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:06,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:18:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:06,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105026474] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:06,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:06,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:18:06,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026796920] [2022-01-18 15:18:06,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:06,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:06,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:06,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:06,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:06,585 INFO L87 Difference]: Start difference. First operand 764 states and 2532 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:07,141 INFO L93 Difference]: Finished difference Result 1168 states and 3684 transitions. [2022-01-18 15:18:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:18:07,141 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:07,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:07,143 INFO L225 Difference]: With dead ends: 1168 [2022-01-18 15:18:07,143 INFO L226 Difference]: Without dead ends: 1114 [2022-01-18 15:18:07,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:18:07,143 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 112 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:07,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 230 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 634 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-01-18 15:18:07,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-01-18 15:18:07,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 769. [2022-01-18 15:18:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.3268229166666665) internal successors, (2555), 768 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:07,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2555 transitions. [2022-01-18 15:18:07,152 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2555 transitions. Word has length 21 [2022-01-18 15:18:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:07,152 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 2555 transitions. [2022-01-18 15:18:07,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2555 transitions. [2022-01-18 15:18:07,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:07,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:07,153 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:07,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:07,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable522 [2022-01-18 15:18:07,354 INFO L402 AbstractCegarLoop]: === Iteration 524 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:07,354 INFO L85 PathProgramCache]: Analyzing trace with hash -591467545, now seen corresponding path program 512 times [2022-01-18 15:18:07,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:07,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658590082] [2022-01-18 15:18:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:07,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:07,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:07,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658590082] [2022-01-18 15:18:07,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658590082] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:07,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761271819] [2022-01-18 15:18:07,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:07,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:07,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:07,457 INFO L229 MonitoredProcess]: Starting monitored process 513 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:07,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Waiting until timeout for monitored process [2022-01-18 15:18:07,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:07,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:07,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:07,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:07,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:07,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:07,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:07,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:07,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:07,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:07,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:07,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:07,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:18:07,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:07,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:07,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:07,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:07,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761271819] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:07,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:07,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:07,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782643953] [2022-01-18 15:18:07,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:07,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:07,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:07,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:07,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:07,897 INFO L87 Difference]: Start difference. First operand 769 states and 2555 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:08,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:08,080 INFO L93 Difference]: Finished difference Result 883 states and 2864 transitions. [2022-01-18 15:18:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:18:08,080 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:08,081 INFO L225 Difference]: With dead ends: 883 [2022-01-18 15:18:08,081 INFO L226 Difference]: Without dead ends: 825 [2022-01-18 15:18:08,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:08,081 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:08,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 187 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 479 Invalid, 0 Unknown, 153 Unchecked, 0.2s Time] [2022-01-18 15:18:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-18 15:18:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 763. [2022-01-18 15:18:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.3280839895013123) internal successors, (2536), 762 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:08,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2536 transitions. [2022-01-18 15:18:08,089 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2536 transitions. Word has length 21 [2022-01-18 15:18:08,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:08,089 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2536 transitions. [2022-01-18 15:18:08,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:08,089 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2536 transitions. [2022-01-18 15:18:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:08,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:08,090 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:08,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Ended with exit code 0 [2022-01-18 15:18:08,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,513 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:08,291 INFO L402 AbstractCegarLoop]: === Iteration 525 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:08,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1311106760, now seen corresponding path program 513 times [2022-01-18 15:18:08,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:08,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575092357] [2022-01-18 15:18:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:08,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:08,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:08,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575092357] [2022-01-18 15:18:08,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575092357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:08,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488675375] [2022-01-18 15:18:08,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:08,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:08,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:08,422 INFO L229 MonitoredProcess]: Starting monitored process 514 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:08,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Waiting until timeout for monitored process [2022-01-18 15:18:08,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:18:08,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:08,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:08,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:08,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:08,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:08,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:08,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:08,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:08,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:08,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:08,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:08,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:18:08,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:08,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:08,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:08,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:08,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488675375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:08,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:08,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:18:08,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463360004] [2022-01-18 15:18:08,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:08,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:08,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:08,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:08,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:08,873 INFO L87 Difference]: Start difference. First operand 763 states and 2536 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:09,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:09,252 INFO L93 Difference]: Finished difference Result 1080 states and 3476 transitions. [2022-01-18 15:18:09,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:18:09,252 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:09,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:09,254 INFO L225 Difference]: With dead ends: 1080 [2022-01-18 15:18:09,254 INFO L226 Difference]: Without dead ends: 1057 [2022-01-18 15:18:09,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:18:09,254 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:09,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 169 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 520 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-01-18 15:18:09,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-01-18 15:18:09,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 763. [2022-01-18 15:18:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.3280839895013123) internal successors, (2536), 762 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2536 transitions. [2022-01-18 15:18:09,263 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2536 transitions. Word has length 21 [2022-01-18 15:18:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:09,264 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2536 transitions. [2022-01-18 15:18:09,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:09,264 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2536 transitions. [2022-01-18 15:18:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:09,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:09,264 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:09,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Ended with exit code 0 [2022-01-18 15:18:09,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 514 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2022-01-18 15:18:09,465 INFO L402 AbstractCegarLoop]: === Iteration 526 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:09,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:09,465 INFO L85 PathProgramCache]: Analyzing trace with hash -133007187, now seen corresponding path program 514 times [2022-01-18 15:18:09,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:09,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859022269] [2022-01-18 15:18:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:09,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:09,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:09,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859022269] [2022-01-18 15:18:09,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859022269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:09,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173323253] [2022-01-18 15:18:09,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:09,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:09,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:09,599 INFO L229 MonitoredProcess]: Starting monitored process 515 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:09,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Waiting until timeout for monitored process [2022-01-18 15:18:09,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:09,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:09,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:09,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:09,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:09,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:09,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:09,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:09,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:09,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:09,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:09,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:09,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:10,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:10,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:18:10,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:10,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:18:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:10,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173323253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:10,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:10,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:10,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111491565] [2022-01-18 15:18:10,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:10,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:10,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:10,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:10,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:10,060 INFO L87 Difference]: Start difference. First operand 763 states and 2536 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:10,451 INFO L93 Difference]: Finished difference Result 975 states and 3138 transitions. [2022-01-18 15:18:10,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:18:10,452 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:10,453 INFO L225 Difference]: With dead ends: 975 [2022-01-18 15:18:10,453 INFO L226 Difference]: Without dead ends: 954 [2022-01-18 15:18:10,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:18:10,453 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:10,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 244 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 735 Invalid, 0 Unknown, 132 Unchecked, 0.3s Time] [2022-01-18 15:18:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-01-18 15:18:10,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 761. [2022-01-18 15:18:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.3210526315789473) internal successors, (2524), 760 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2524 transitions. [2022-01-18 15:18:10,462 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2524 transitions. Word has length 21 [2022-01-18 15:18:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:10,462 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2524 transitions. [2022-01-18 15:18:10,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2524 transitions. [2022-01-18 15:18:10,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:10,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:10,463 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:10,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:10,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 515 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2022-01-18 15:18:10,663 INFO L402 AbstractCegarLoop]: === Iteration 527 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:10,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:10,664 INFO L85 PathProgramCache]: Analyzing trace with hash 995796058, now seen corresponding path program 515 times [2022-01-18 15:18:10,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:10,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520344281] [2022-01-18 15:18:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:10,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:10,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:10,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520344281] [2022-01-18 15:18:10,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520344281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:10,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002379004] [2022-01-18 15:18:10,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:10,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:10,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:10,766 INFO L229 MonitoredProcess]: Starting monitored process 516 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:10,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Waiting until timeout for monitored process [2022-01-18 15:18:10,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:18:10,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:10,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:10,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:10,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:10,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:10,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:10,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:10,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:10,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:10,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:11,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:11,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:18:11,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:11,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:11,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:11,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:11,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002379004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:11,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:11,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:18:11,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82177661] [2022-01-18 15:18:11,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:11,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:11,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:11,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:11,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:11,223 INFO L87 Difference]: Start difference. First operand 761 states and 2524 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:11,530 INFO L93 Difference]: Finished difference Result 976 states and 3167 transitions. [2022-01-18 15:18:11,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:18:11,530 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:11,532 INFO L225 Difference]: With dead ends: 976 [2022-01-18 15:18:11,532 INFO L226 Difference]: Without dead ends: 957 [2022-01-18 15:18:11,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:18:11,532 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:11,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 205 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 517 Invalid, 0 Unknown, 239 Unchecked, 0.2s Time] [2022-01-18 15:18:11,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-01-18 15:18:11,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 765. [2022-01-18 15:18:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 3.319371727748691) internal successors, (2536), 764 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2536 transitions. [2022-01-18 15:18:11,540 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2536 transitions. Word has length 21 [2022-01-18 15:18:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:11,541 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 2536 transitions. [2022-01-18 15:18:11,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2536 transitions. [2022-01-18 15:18:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:11,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:11,541 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:11,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Ended with exit code 0 [2022-01-18 15:18:11,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,516 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:11,742 INFO L402 AbstractCegarLoop]: === Iteration 528 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:11,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:11,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1051558886, now seen corresponding path program 516 times [2022-01-18 15:18:11,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:11,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376651226] [2022-01-18 15:18:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:11,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:11,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:11,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376651226] [2022-01-18 15:18:11,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376651226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:11,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097307176] [2022-01-18 15:18:11,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:11,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:11,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:11,846 INFO L229 MonitoredProcess]: Starting monitored process 517 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:11,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Waiting until timeout for monitored process [2022-01-18 15:18:11,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:18:11,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:11,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:11,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:11,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:11,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:12,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:12,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:12,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:12,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:12,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:12,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:12,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:18:12,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:12,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:12,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:12,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:12,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097307176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:12,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:12,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:18:12,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584843355] [2022-01-18 15:18:12,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:12,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:12,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:12,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:12,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:12,298 INFO L87 Difference]: Start difference. First operand 765 states and 2536 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:12,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:12,581 INFO L93 Difference]: Finished difference Result 968 states and 3147 transitions. [2022-01-18 15:18:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:18:12,582 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:12,583 INFO L225 Difference]: With dead ends: 968 [2022-01-18 15:18:12,583 INFO L226 Difference]: Without dead ends: 949 [2022-01-18 15:18:12,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:12,583 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:12,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 176 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 513 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-01-18 15:18:12,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-01-18 15:18:12,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 766. [2022-01-18 15:18:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.3215686274509806) internal successors, (2541), 765 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2541 transitions. [2022-01-18 15:18:12,592 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2541 transitions. Word has length 21 [2022-01-18 15:18:12,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:12,592 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 2541 transitions. [2022-01-18 15:18:12,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:12,592 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2541 transitions. [2022-01-18 15:18:12,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:12,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:12,593 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:12,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Ended with exit code 0 [2022-01-18 15:18:12,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2022-01-18 15:18:12,793 INFO L402 AbstractCegarLoop]: === Iteration 529 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:12,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:12,793 INFO L85 PathProgramCache]: Analyzing trace with hash -336407216, now seen corresponding path program 517 times [2022-01-18 15:18:12,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:12,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313811705] [2022-01-18 15:18:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:12,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:12,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:12,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313811705] [2022-01-18 15:18:12,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313811705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:12,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192632986] [2022-01-18 15:18:12,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:12,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:12,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:12,908 INFO L229 MonitoredProcess]: Starting monitored process 518 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:12,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Waiting until timeout for monitored process [2022-01-18 15:18:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:12,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:12,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:13,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:13,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:13,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:13,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:13,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:13,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:13,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:13,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:18:13,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:13,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:13,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:13,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:13,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192632986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:13,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:13,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:13,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042740709] [2022-01-18 15:18:13,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:13,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:13,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:13,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:13,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:13,335 INFO L87 Difference]: Start difference. First operand 766 states and 2541 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:13,617 INFO L93 Difference]: Finished difference Result 905 states and 2956 transitions. [2022-01-18 15:18:13,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:13,618 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:13,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:13,619 INFO L225 Difference]: With dead ends: 905 [2022-01-18 15:18:13,619 INFO L226 Difference]: Without dead ends: 886 [2022-01-18 15:18:13,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:13,619 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:13,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 157 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 557 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-18 15:18:13,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-18 15:18:13,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 770. [2022-01-18 15:18:13,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.3250975292587777) internal successors, (2557), 769 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:13,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2557 transitions. [2022-01-18 15:18:13,628 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2557 transitions. Word has length 21 [2022-01-18 15:18:13,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:13,628 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 2557 transitions. [2022-01-18 15:18:13,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2557 transitions. [2022-01-18 15:18:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:13,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:13,629 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:13,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:13,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,518 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:13,829 INFO L402 AbstractCegarLoop]: === Iteration 530 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash 250508386, now seen corresponding path program 518 times [2022-01-18 15:18:13,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:13,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736316373] [2022-01-18 15:18:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:13,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:13,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:13,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736316373] [2022-01-18 15:18:13,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736316373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:13,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580179482] [2022-01-18 15:18:13,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:13,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:13,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:13,947 INFO L229 MonitoredProcess]: Starting monitored process 519 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:13,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Waiting until timeout for monitored process [2022-01-18 15:18:13,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:13,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:13,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:13,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:14,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:14,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:14,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:14,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:14,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:14,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:14,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:14,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:14,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:18:14,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:14,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:14,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:14,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:14,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580179482] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:14,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:14,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:14,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249858954] [2022-01-18 15:18:14,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:14,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:14,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:14,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:14,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:14,460 INFO L87 Difference]: Start difference. First operand 770 states and 2557 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:14,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:14,716 INFO L93 Difference]: Finished difference Result 958 states and 3084 transitions. [2022-01-18 15:18:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:18:14,716 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:14,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:14,717 INFO L225 Difference]: With dead ends: 958 [2022-01-18 15:18:14,717 INFO L226 Difference]: Without dead ends: 939 [2022-01-18 15:18:14,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:18:14,718 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:14,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 202 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 474 Invalid, 0 Unknown, 123 Unchecked, 0.2s Time] [2022-01-18 15:18:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-01-18 15:18:14,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 778. [2022-01-18 15:18:14,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 3.317889317889318) internal successors, (2578), 777 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2578 transitions. [2022-01-18 15:18:14,726 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2578 transitions. Word has length 21 [2022-01-18 15:18:14,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:14,726 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 2578 transitions. [2022-01-18 15:18:14,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:14,727 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2578 transitions. [2022-01-18 15:18:14,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:14,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:14,728 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:14,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Ended with exit code 0 [2022-01-18 15:18:14,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2022-01-18 15:18:14,928 INFO L402 AbstractCegarLoop]: === Iteration 531 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:14,928 INFO L85 PathProgramCache]: Analyzing trace with hash -424873542, now seen corresponding path program 519 times [2022-01-18 15:18:14,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:14,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301896556] [2022-01-18 15:18:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:14,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:15,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:15,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301896556] [2022-01-18 15:18:15,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301896556] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:15,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663132594] [2022-01-18 15:18:15,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:15,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:15,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:15,039 INFO L229 MonitoredProcess]: Starting monitored process 520 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:15,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Waiting until timeout for monitored process [2022-01-18 15:18:15,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:18:15,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:15,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:15,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:15,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:15,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:15,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:15,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:15,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:15,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:15,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:15,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:18:15,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:15,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:15,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:15,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:15,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663132594] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:15,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:15,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:15,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151839562] [2022-01-18 15:18:15,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:15,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:15,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:15,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:15,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:15,517 INFO L87 Difference]: Start difference. First operand 778 states and 2578 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:15,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:15,819 INFO L93 Difference]: Finished difference Result 1020 states and 3259 transitions. [2022-01-18 15:18:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:18:15,819 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:15,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:15,820 INFO L225 Difference]: With dead ends: 1020 [2022-01-18 15:18:15,821 INFO L226 Difference]: Without dead ends: 982 [2022-01-18 15:18:15,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:18:15,821 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:15,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 247 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 578 Invalid, 0 Unknown, 162 Unchecked, 0.2s Time] [2022-01-18 15:18:15,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-01-18 15:18:15,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 774. [2022-01-18 15:18:15,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.3234152652005173) internal successors, (2569), 773 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2569 transitions. [2022-01-18 15:18:15,830 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2569 transitions. Word has length 21 [2022-01-18 15:18:15,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:15,830 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 2569 transitions. [2022-01-18 15:18:15,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:15,830 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2569 transitions. [2022-01-18 15:18:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:15,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:15,831 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:15,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Ended with exit code 0 [2022-01-18 15:18:16,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2022-01-18 15:18:16,031 INFO L402 AbstractCegarLoop]: === Iteration 532 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:16,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:16,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1486469820, now seen corresponding path program 520 times [2022-01-18 15:18:16,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421472898] [2022-01-18 15:18:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:16,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:16,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:16,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421472898] [2022-01-18 15:18:16,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421472898] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:16,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694347057] [2022-01-18 15:18:16,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:16,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:16,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:16,150 INFO L229 MonitoredProcess]: Starting monitored process 521 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:16,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Waiting until timeout for monitored process [2022-01-18 15:18:16,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:16,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:16,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:16,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:16,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:16,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:16,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:16,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:16,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:16,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:16,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:16,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:16,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:18:16,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:16,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:16,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:16,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:16,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694347057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:16,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:16,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:16,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781744310] [2022-01-18 15:18:16,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:16,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:16,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:16,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:16,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:16,678 INFO L87 Difference]: Start difference. First operand 774 states and 2569 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:16,904 INFO L93 Difference]: Finished difference Result 962 states and 3085 transitions. [2022-01-18 15:18:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:18:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:16,906 INFO L225 Difference]: With dead ends: 962 [2022-01-18 15:18:16,906 INFO L226 Difference]: Without dead ends: 952 [2022-01-18 15:18:16,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:18:16,906 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:16,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 182 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 374 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2022-01-18 15:18:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-01-18 15:18:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 772. [2022-01-18 15:18:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.324254215304799) internal successors, (2563), 771 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2563 transitions. [2022-01-18 15:18:16,915 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2563 transitions. Word has length 21 [2022-01-18 15:18:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:16,915 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2563 transitions. [2022-01-18 15:18:16,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2563 transitions. [2022-01-18 15:18:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:16,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:16,916 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:16,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Ended with exit code 0 [2022-01-18 15:18:17,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2022-01-18 15:18:17,117 INFO L402 AbstractCegarLoop]: === Iteration 533 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:17,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1693277786, now seen corresponding path program 521 times [2022-01-18 15:18:17,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:17,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027248013] [2022-01-18 15:18:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:17,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:17,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:17,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027248013] [2022-01-18 15:18:17,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027248013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:17,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081013381] [2022-01-18 15:18:17,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:17,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:17,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:17,237 INFO L229 MonitoredProcess]: Starting monitored process 522 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:17,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Waiting until timeout for monitored process [2022-01-18 15:18:17,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:17,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:17,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:17,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:17,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:17,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:17,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:17,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:17,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:17,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:17,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:17,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:17,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:18:17,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:17,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:17,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:17,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:17,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081013381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:17,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:17,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:17,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405487198] [2022-01-18 15:18:17,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:17,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:17,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:17,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:17,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:17,787 INFO L87 Difference]: Start difference. First operand 772 states and 2563 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:17,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:17,988 INFO L93 Difference]: Finished difference Result 982 states and 3133 transitions. [2022-01-18 15:18:17,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:18:17,988 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:17,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:17,990 INFO L225 Difference]: With dead ends: 982 [2022-01-18 15:18:17,990 INFO L226 Difference]: Without dead ends: 960 [2022-01-18 15:18:17,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:18:17,990 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:17,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 239 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 297 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2022-01-18 15:18:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-01-18 15:18:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 783. [2022-01-18 15:18:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.3209718670076724) internal successors, (2597), 782 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2597 transitions. [2022-01-18 15:18:17,999 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2597 transitions. Word has length 21 [2022-01-18 15:18:17,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:17,999 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 2597 transitions. [2022-01-18 15:18:17,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2597 transitions. [2022-01-18 15:18:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:18,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:18,000 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:18,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Ended with exit code 0 [2022-01-18 15:18:18,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 522 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2022-01-18 15:18:18,201 INFO L402 AbstractCegarLoop]: === Iteration 534 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:18,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1926307582, now seen corresponding path program 522 times [2022-01-18 15:18:18,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:18,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600706773] [2022-01-18 15:18:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:18,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:18,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:18,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600706773] [2022-01-18 15:18:18,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600706773] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:18,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235622788] [2022-01-18 15:18:18,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:18,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:18,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:18,321 INFO L229 MonitoredProcess]: Starting monitored process 523 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:18,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Waiting until timeout for monitored process [2022-01-18 15:18:18,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:18:18,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:18,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:18,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:18,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:18,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:18,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:18,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:18,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:18,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:18,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:18,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:18,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:18:18,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:18,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:18,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:18,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:18,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235622788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:18,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:18,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:18,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892025299] [2022-01-18 15:18:18,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:18,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:18,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:18,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:18,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:18,912 INFO L87 Difference]: Start difference. First operand 783 states and 2597 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:19,164 INFO L93 Difference]: Finished difference Result 982 states and 3147 transitions. [2022-01-18 15:18:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:18:19,164 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:19,165 INFO L225 Difference]: With dead ends: 982 [2022-01-18 15:18:19,165 INFO L226 Difference]: Without dead ends: 963 [2022-01-18 15:18:19,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:18:19,166 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:19,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 174 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 446 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2022-01-18 15:18:19,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-01-18 15:18:19,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 763. [2022-01-18 15:18:19,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.3241469816272966) internal successors, (2533), 762 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2533 transitions. [2022-01-18 15:18:19,174 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2533 transitions. Word has length 21 [2022-01-18 15:18:19,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:19,174 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2533 transitions. [2022-01-18 15:18:19,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:19,175 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2533 transitions. [2022-01-18 15:18:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:19,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:19,175 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:19,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Ended with exit code 0 [2022-01-18 15:18:19,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,523 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:19,376 INFO L402 AbstractCegarLoop]: === Iteration 535 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:19,376 INFO L85 PathProgramCache]: Analyzing trace with hash -487176781, now seen corresponding path program 523 times [2022-01-18 15:18:19,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:19,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849924526] [2022-01-18 15:18:19,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:19,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:19,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:19,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849924526] [2022-01-18 15:18:19,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849924526] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:19,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584495365] [2022-01-18 15:18:19,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:19,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:19,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:19,470 INFO L229 MonitoredProcess]: Starting monitored process 524 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:19,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Waiting until timeout for monitored process [2022-01-18 15:18:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:19,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:19,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:19,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:19,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:19,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:19,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:19,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:19,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:19,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:19,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:19,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:19,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:19,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:19,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:19,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:18:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:19,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584495365] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:19,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:19,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:18:19,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675429758] [2022-01-18 15:18:19,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:19,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:19,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:19,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:19,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:19,961 INFO L87 Difference]: Start difference. First operand 763 states and 2533 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:20,272 INFO L93 Difference]: Finished difference Result 1012 states and 3266 transitions. [2022-01-18 15:18:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:18:20,272 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:20,274 INFO L225 Difference]: With dead ends: 1012 [2022-01-18 15:18:20,274 INFO L226 Difference]: Without dead ends: 979 [2022-01-18 15:18:20,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:20,274 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:20,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 231 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 603 Invalid, 0 Unknown, 222 Unchecked, 0.2s Time] [2022-01-18 15:18:20,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-01-18 15:18:20,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 768. [2022-01-18 15:18:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.320730117340287) internal successors, (2547), 767 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2547 transitions. [2022-01-18 15:18:20,283 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2547 transitions. Word has length 21 [2022-01-18 15:18:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:20,283 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 2547 transitions. [2022-01-18 15:18:20,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2547 transitions. [2022-01-18 15:18:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:20,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:20,284 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:20,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:20,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 524 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2022-01-18 15:18:20,484 INFO L402 AbstractCegarLoop]: === Iteration 536 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:20,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1850365971, now seen corresponding path program 524 times [2022-01-18 15:18:20,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:20,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119134979] [2022-01-18 15:18:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:20,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:20,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:20,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119134979] [2022-01-18 15:18:20,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119134979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:20,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459255540] [2022-01-18 15:18:20,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:20,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:20,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:20,585 INFO L229 MonitoredProcess]: Starting monitored process 525 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:20,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Waiting until timeout for monitored process [2022-01-18 15:18:20,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:20,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:20,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:20,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:20,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:20,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:20,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:20,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:20,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:20,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:18:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:20,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:20,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:20,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:18:20,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:20,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:20,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:20,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:21,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459255540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:21,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:21,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:21,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747541217] [2022-01-18 15:18:21,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:21,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:21,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:21,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:21,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:21,002 INFO L87 Difference]: Start difference. First operand 768 states and 2547 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:21,105 INFO L93 Difference]: Finished difference Result 847 states and 2766 transitions. [2022-01-18 15:18:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:21,105 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:21,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:21,106 INFO L225 Difference]: With dead ends: 847 [2022-01-18 15:18:21,106 INFO L226 Difference]: Without dead ends: 825 [2022-01-18 15:18:21,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:21,107 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:21,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 130 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 255 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2022-01-18 15:18:21,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-18 15:18:21,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 768. [2022-01-18 15:18:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.320730117340287) internal successors, (2547), 767 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2547 transitions. [2022-01-18 15:18:21,115 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2547 transitions. Word has length 21 [2022-01-18 15:18:21,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:21,115 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 2547 transitions. [2022-01-18 15:18:21,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:21,115 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2547 transitions. [2022-01-18 15:18:21,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:21,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:21,116 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:21,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:21,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2022-01-18 15:18:21,316 INFO L402 AbstractCegarLoop]: === Iteration 537 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:21,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1175280107, now seen corresponding path program 525 times [2022-01-18 15:18:21,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:21,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409961930] [2022-01-18 15:18:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:21,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:21,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:21,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409961930] [2022-01-18 15:18:21,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409961930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:21,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426914783] [2022-01-18 15:18:21,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:21,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:21,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:21,415 INFO L229 MonitoredProcess]: Starting monitored process 526 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:21,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Waiting until timeout for monitored process [2022-01-18 15:18:21,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:18:21,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:21,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:21,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:21,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:21,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:21,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:21,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:21,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:21,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:18:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:21,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:21,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:21,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:18:21,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:21,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:21,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:21,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:21,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426914783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:21,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:21,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:21,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436062680] [2022-01-18 15:18:21,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:21,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:21,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:21,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:21,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:21,840 INFO L87 Difference]: Start difference. First operand 768 states and 2547 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:21,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:21,945 INFO L93 Difference]: Finished difference Result 844 states and 2748 transitions. [2022-01-18 15:18:21,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:21,945 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:21,946 INFO L225 Difference]: With dead ends: 844 [2022-01-18 15:18:21,946 INFO L226 Difference]: Without dead ends: 834 [2022-01-18 15:18:21,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:21,947 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:21,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 152 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-01-18 15:18:21,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-01-18 15:18:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 768. [2022-01-18 15:18:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.320730117340287) internal successors, (2547), 767 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2547 transitions. [2022-01-18 15:18:21,955 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2547 transitions. Word has length 21 [2022-01-18 15:18:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:21,955 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 2547 transitions. [2022-01-18 15:18:21,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2547 transitions. [2022-01-18 15:18:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:21,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:21,956 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:21,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:22,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable536,526 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:22,156 INFO L402 AbstractCegarLoop]: === Iteration 538 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:22,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:22,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1961334127, now seen corresponding path program 526 times [2022-01-18 15:18:22,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:22,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540105937] [2022-01-18 15:18:22,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:22,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:22,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:22,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540105937] [2022-01-18 15:18:22,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540105937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:22,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558235467] [2022-01-18 15:18:22,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:22,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:22,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:22,258 INFO L229 MonitoredProcess]: Starting monitored process 527 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:22,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Waiting until timeout for monitored process [2022-01-18 15:18:22,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:22,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:22,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:22,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:22,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:22,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:22,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:22,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:22,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:22,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:22,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:22,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:22,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:22,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:22,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:22,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:18:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:22,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558235467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:22,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:22,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:18:22,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321540601] [2022-01-18 15:18:22,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:22,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:22,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:22,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:22,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:22,749 INFO L87 Difference]: Start difference. First operand 768 states and 2547 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:23,056 INFO L93 Difference]: Finished difference Result 983 states and 3174 transitions. [2022-01-18 15:18:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:18:23,057 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:23,058 INFO L225 Difference]: With dead ends: 983 [2022-01-18 15:18:23,058 INFO L226 Difference]: Without dead ends: 956 [2022-01-18 15:18:23,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:18:23,059 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 64 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:23,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 183 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 576 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-01-18 15:18:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-01-18 15:18:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 770. [2022-01-18 15:18:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.318595578673602) internal successors, (2552), 769 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2552 transitions. [2022-01-18 15:18:23,068 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2552 transitions. Word has length 21 [2022-01-18 15:18:23,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:23,068 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 2552 transitions. [2022-01-18 15:18:23,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:23,068 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2552 transitions. [2022-01-18 15:18:23,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:23,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:23,069 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:23,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Ended with exit code 0 [2022-01-18 15:18:23,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,527 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:23,269 INFO L402 AbstractCegarLoop]: === Iteration 539 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:23,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:23,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1105777399, now seen corresponding path program 527 times [2022-01-18 15:18:23,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:23,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031657885] [2022-01-18 15:18:23,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:23,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:23,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:23,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031657885] [2022-01-18 15:18:23,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031657885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:23,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110026412] [2022-01-18 15:18:23,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:23,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:23,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:23,372 INFO L229 MonitoredProcess]: Starting monitored process 528 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:23,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Waiting until timeout for monitored process [2022-01-18 15:18:23,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:23,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:23,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:23,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:23,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:23,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:23,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:23,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:23,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:23,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:23,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:23,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:23,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:18:23,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:23,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:23,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:23,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:23,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110026412] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:23,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:23,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:23,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514523000] [2022-01-18 15:18:23,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:23,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:23,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:23,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:23,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:23,819 INFO L87 Difference]: Start difference. First operand 770 states and 2552 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:23,984 INFO L93 Difference]: Finished difference Result 861 states and 2796 transitions. [2022-01-18 15:18:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:18:23,984 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:23,986 INFO L225 Difference]: With dead ends: 861 [2022-01-18 15:18:23,986 INFO L226 Difference]: Without dead ends: 832 [2022-01-18 15:18:23,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:23,986 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:23,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 172 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 465 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-01-18 15:18:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-18 15:18:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 767. [2022-01-18 15:18:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.3211488250652743) internal successors, (2544), 766 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:23,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2544 transitions. [2022-01-18 15:18:23,994 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2544 transitions. Word has length 21 [2022-01-18 15:18:23,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:23,994 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 2544 transitions. [2022-01-18 15:18:23,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2544 transitions. [2022-01-18 15:18:23,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:23,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:23,995 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:24,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Ended with exit code 0 [2022-01-18 15:18:24,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,528 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:24,195 INFO L402 AbstractCegarLoop]: === Iteration 540 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:24,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:24,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1181428875, now seen corresponding path program 528 times [2022-01-18 15:18:24,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:24,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117540801] [2022-01-18 15:18:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:24,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:24,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:24,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117540801] [2022-01-18 15:18:24,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117540801] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:24,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962726591] [2022-01-18 15:18:24,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:24,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:24,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:24,289 INFO L229 MonitoredProcess]: Starting monitored process 529 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:24,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Waiting until timeout for monitored process [2022-01-18 15:18:24,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:18:24,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:24,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:24,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:24,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:24,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:24,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:24,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:24,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:24,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:24,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:24,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:24,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:24,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:24,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:24,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:24,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:18:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:24,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962726591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:24,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:24,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:18:24,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848285889] [2022-01-18 15:18:24,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:24,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:24,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:24,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:24,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:24,794 INFO L87 Difference]: Start difference. First operand 767 states and 2544 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:25,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:25,043 INFO L93 Difference]: Finished difference Result 987 states and 3187 transitions. [2022-01-18 15:18:25,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:18:25,043 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:25,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:25,045 INFO L225 Difference]: With dead ends: 987 [2022-01-18 15:18:25,045 INFO L226 Difference]: Without dead ends: 974 [2022-01-18 15:18:25,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:25,045 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:25,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 203 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 415 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-01-18 15:18:25,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-01-18 15:18:25,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 767. [2022-01-18 15:18:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.3198433420365534) internal successors, (2543), 766 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2543 transitions. [2022-01-18 15:18:25,054 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2543 transitions. Word has length 21 [2022-01-18 15:18:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:25,054 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 2543 transitions. [2022-01-18 15:18:25,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2543 transitions. [2022-01-18 15:18:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:25,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:25,055 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:25,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Ended with exit code 0 [2022-01-18 15:18:25,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,529 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:25,255 INFO L402 AbstractCegarLoop]: === Iteration 541 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:25,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1933883667, now seen corresponding path program 529 times [2022-01-18 15:18:25,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:25,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541910730] [2022-01-18 15:18:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:25,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:25,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:25,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541910730] [2022-01-18 15:18:25,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541910730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:25,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711329989] [2022-01-18 15:18:25,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:25,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:25,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:25,375 INFO L229 MonitoredProcess]: Starting monitored process 530 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:25,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Waiting until timeout for monitored process [2022-01-18 15:18:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:25,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:25,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:25,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:25,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:25,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:25,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:25,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:25,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:18:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:25,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:25,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:25,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:18:25,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:25,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:25,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:25,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:25,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711329989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:25,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:25,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:25,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401061821] [2022-01-18 15:18:25,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:25,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:25,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:25,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:25,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:25,816 INFO L87 Difference]: Start difference. First operand 767 states and 2543 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:25,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:25,963 INFO L93 Difference]: Finished difference Result 848 states and 2757 transitions. [2022-01-18 15:18:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:25,963 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:25,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:25,964 INFO L225 Difference]: With dead ends: 848 [2022-01-18 15:18:25,964 INFO L226 Difference]: Without dead ends: 838 [2022-01-18 15:18:25,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:25,964 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:25,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 190 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 413 Invalid, 0 Unknown, 178 Unchecked, 0.1s Time] [2022-01-18 15:18:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-01-18 15:18:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 766. [2022-01-18 15:18:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.3215686274509806) internal successors, (2541), 765 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2541 transitions. [2022-01-18 15:18:25,972 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2541 transitions. Word has length 21 [2022-01-18 15:18:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:25,973 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 2541 transitions. [2022-01-18 15:18:25,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:25,973 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2541 transitions. [2022-01-18 15:18:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:25,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:25,974 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:25,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Ended with exit code 0 [2022-01-18 15:18:26,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 530 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2022-01-18 15:18:26,174 INFO L402 AbstractCegarLoop]: === Iteration 542 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:26,174 INFO L85 PathProgramCache]: Analyzing trace with hash 958954473, now seen corresponding path program 530 times [2022-01-18 15:18:26,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:26,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504600625] [2022-01-18 15:18:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:26,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:26,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:26,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504600625] [2022-01-18 15:18:26,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504600625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:26,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332137860] [2022-01-18 15:18:26,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:26,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:26,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:26,274 INFO L229 MonitoredProcess]: Starting monitored process 531 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:26,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Waiting until timeout for monitored process [2022-01-18 15:18:26,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:26,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:26,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:26,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:26,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:26,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:26,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:26,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:26,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:26,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:26,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:26,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:18:26,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:26,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:26,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:26,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:18:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:26,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332137860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:26,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:26,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:18:26,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670087379] [2022-01-18 15:18:26,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:26,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:26,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:26,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:26,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:26,730 INFO L87 Difference]: Start difference. First operand 766 states and 2541 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:27,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:27,113 INFO L93 Difference]: Finished difference Result 1054 states and 3359 transitions. [2022-01-18 15:18:27,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:18:27,113 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:27,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:27,114 INFO L225 Difference]: With dead ends: 1054 [2022-01-18 15:18:27,114 INFO L226 Difference]: Without dead ends: 1000 [2022-01-18 15:18:27,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:18:27,115 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:27,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 221 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 756 Invalid, 0 Unknown, 7 Unchecked, 0.3s Time] [2022-01-18 15:18:27,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2022-01-18 15:18:27,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 775. [2022-01-18 15:18:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.3333333333333335) internal successors, (2580), 774 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2580 transitions. [2022-01-18 15:18:27,124 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2580 transitions. Word has length 21 [2022-01-18 15:18:27,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:27,124 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2580 transitions. [2022-01-18 15:18:27,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:27,124 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2580 transitions. [2022-01-18 15:18:27,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:27,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:27,125 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:27,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Ended with exit code 0 [2022-01-18 15:18:27,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2022-01-18 15:18:27,325 INFO L402 AbstractCegarLoop]: === Iteration 543 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:27,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:27,326 INFO L85 PathProgramCache]: Analyzing trace with hash 103397745, now seen corresponding path program 531 times [2022-01-18 15:18:27,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:27,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638161158] [2022-01-18 15:18:27,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:27,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:27,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:27,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638161158] [2022-01-18 15:18:27,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638161158] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:27,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192035961] [2022-01-18 15:18:27,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:27,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:27,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:27,425 INFO L229 MonitoredProcess]: Starting monitored process 532 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:27,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Waiting until timeout for monitored process [2022-01-18 15:18:27,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:18:27,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:27,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:27,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:27,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:27,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:27,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:18:27,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:27,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:27,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:27,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:27,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:27,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:27,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:27,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:27,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:27,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192035961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:27,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:27,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:27,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168404290] [2022-01-18 15:18:27,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:27,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:27,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:27,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:27,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:27,803 INFO L87 Difference]: Start difference. First operand 775 states and 2580 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:27,978 INFO L93 Difference]: Finished difference Result 889 states and 2889 transitions. [2022-01-18 15:18:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:27,978 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:27,980 INFO L225 Difference]: With dead ends: 889 [2022-01-18 15:18:27,980 INFO L226 Difference]: Without dead ends: 831 [2022-01-18 15:18:27,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:27,980 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:27,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 138 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 461 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-18 15:18:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-18 15:18:27,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 772. [2022-01-18 15:18:27,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.3320363164721143) internal successors, (2569), 771 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2569 transitions. [2022-01-18 15:18:27,988 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2569 transitions. Word has length 21 [2022-01-18 15:18:27,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:27,988 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2569 transitions. [2022-01-18 15:18:27,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:27,988 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2569 transitions. [2022-01-18 15:18:27,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:27,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:27,989 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:28,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Ended with exit code 0 [2022-01-18 15:18:28,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable542,532 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:28,190 INFO L402 AbstractCegarLoop]: === Iteration 544 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:28,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:28,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1225543149, now seen corresponding path program 532 times [2022-01-18 15:18:28,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:28,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373205521] [2022-01-18 15:18:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:28,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:28,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:28,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373205521] [2022-01-18 15:18:28,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373205521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:28,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131455883] [2022-01-18 15:18:28,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:28,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:28,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:28,293 INFO L229 MonitoredProcess]: Starting monitored process 533 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:28,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Waiting until timeout for monitored process [2022-01-18 15:18:28,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:28,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:28,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:28,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:28,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:28,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:28,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:28,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:18:28,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:28,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:28,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:28,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:28,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:28,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:28,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:28,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:28,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:28,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131455883] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:28,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:28,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:28,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396458219] [2022-01-18 15:18:28,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:28,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:28,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:28,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:28,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:28,748 INFO L87 Difference]: Start difference. First operand 772 states and 2569 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:28,913 INFO L93 Difference]: Finished difference Result 910 states and 2917 transitions. [2022-01-18 15:18:28,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:18:28,913 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:28,914 INFO L225 Difference]: With dead ends: 910 [2022-01-18 15:18:28,914 INFO L226 Difference]: Without dead ends: 849 [2022-01-18 15:18:28,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:28,914 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:28,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 221 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 466 Invalid, 0 Unknown, 116 Unchecked, 0.2s Time] [2022-01-18 15:18:28,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-01-18 15:18:28,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 778. [2022-01-18 15:18:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 3.3217503217503217) internal successors, (2581), 777 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2581 transitions. [2022-01-18 15:18:28,923 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2581 transitions. Word has length 21 [2022-01-18 15:18:28,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:28,923 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 2581 transitions. [2022-01-18 15:18:28,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:28,923 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2581 transitions. [2022-01-18 15:18:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:28,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:28,924 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:28,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Ended with exit code 0 [2022-01-18 15:18:29,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2022-01-18 15:18:29,124 INFO L402 AbstractCegarLoop]: === Iteration 545 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:29,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:29,124 INFO L85 PathProgramCache]: Analyzing trace with hash 889451765, now seen corresponding path program 533 times [2022-01-18 15:18:29,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:29,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883410731] [2022-01-18 15:18:29,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:29,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:29,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883410731] [2022-01-18 15:18:29,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883410731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889504929] [2022-01-18 15:18:29,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:29,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:29,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:29,234 INFO L229 MonitoredProcess]: Starting monitored process 534 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:29,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Waiting until timeout for monitored process [2022-01-18 15:18:29,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:18:29,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:29,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:29,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:29,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:29,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:29,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:29,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:29,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:29,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:29,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:29,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:29,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:29,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:29,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:18:29,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:29,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:18:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:29,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889504929] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:29,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:29,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:29,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127530863] [2022-01-18 15:18:29,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:29,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:29,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:29,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:29,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:29,777 INFO L87 Difference]: Start difference. First operand 778 states and 2581 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:29,941 INFO L93 Difference]: Finished difference Result 1013 states and 3260 transitions. [2022-01-18 15:18:29,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:18:29,941 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:29,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:29,943 INFO L225 Difference]: With dead ends: 1013 [2022-01-18 15:18:29,943 INFO L226 Difference]: Without dead ends: 971 [2022-01-18 15:18:29,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:29,943 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:29,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 171 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 282 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-01-18 15:18:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-01-18 15:18:29,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 782. [2022-01-18 15:18:29,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.325224071702945) internal successors, (2597), 781 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2597 transitions. [2022-01-18 15:18:29,952 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2597 transitions. Word has length 21 [2022-01-18 15:18:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:29,952 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2597 transitions. [2022-01-18 15:18:29,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2597 transitions. [2022-01-18 15:18:29,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:29,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:29,953 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:29,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Ended with exit code 0 [2022-01-18 15:18:30,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 534 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2022-01-18 15:18:30,153 INFO L402 AbstractCegarLoop]: === Iteration 546 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:30,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:30,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1476367367, now seen corresponding path program 534 times [2022-01-18 15:18:30,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:30,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172799882] [2022-01-18 15:18:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:30,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:30,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:30,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172799882] [2022-01-18 15:18:30,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172799882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:30,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345290494] [2022-01-18 15:18:30,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:30,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:30,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:30,264 INFO L229 MonitoredProcess]: Starting monitored process 535 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:30,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Waiting until timeout for monitored process [2022-01-18 15:18:30,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:18:30,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:30,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:30,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:30,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:30,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:30,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:30,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:30,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:30,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:30,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:30,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:30,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:30,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:30,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:18:30,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:30,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:18:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:30,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345290494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:30,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:30,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:30,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169594458] [2022-01-18 15:18:30,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:30,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:30,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:30,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:30,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:30,834 INFO L87 Difference]: Start difference. First operand 782 states and 2597 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:31,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:31,079 INFO L93 Difference]: Finished difference Result 1028 states and 3277 transitions. [2022-01-18 15:18:31,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:18:31,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:31,081 INFO L225 Difference]: With dead ends: 1028 [2022-01-18 15:18:31,081 INFO L226 Difference]: Without dead ends: 996 [2022-01-18 15:18:31,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:31,081 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:31,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 203 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 518 Invalid, 0 Unknown, 268 Unchecked, 0.2s Time] [2022-01-18 15:18:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-01-18 15:18:31,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 780. [2022-01-18 15:18:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3273427471116817) internal successors, (2592), 779 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:31,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2592 transitions. [2022-01-18 15:18:31,090 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2592 transitions. Word has length 21 [2022-01-18 15:18:31,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:31,090 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2592 transitions. [2022-01-18 15:18:31,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2592 transitions. [2022-01-18 15:18:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:31,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:31,091 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:31,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Ended with exit code 0 [2022-01-18 15:18:31,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable545,535 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:31,292 INFO L402 AbstractCegarLoop]: === Iteration 547 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:31,292 INFO L85 PathProgramCache]: Analyzing trace with hash -678617983, now seen corresponding path program 535 times [2022-01-18 15:18:31,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:31,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78975854] [2022-01-18 15:18:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:31,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:31,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:31,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78975854] [2022-01-18 15:18:31,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78975854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:31,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084061839] [2022-01-18 15:18:31,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:31,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:31,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:31,391 INFO L229 MonitoredProcess]: Starting monitored process 536 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:31,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Waiting until timeout for monitored process [2022-01-18 15:18:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:31,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:31,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:31,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:31,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:31,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:31,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:31,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:31,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:31,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:31,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:18:31,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:31,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:31,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:31,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:18:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:31,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084061839] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:31,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:31,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:18:31,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757255414] [2022-01-18 15:18:31,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:31,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:31,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:31,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:31,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:31,860 INFO L87 Difference]: Start difference. First operand 780 states and 2592 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:32,269 INFO L93 Difference]: Finished difference Result 1018 states and 3248 transitions. [2022-01-18 15:18:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:18:32,269 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:32,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:32,270 INFO L225 Difference]: With dead ends: 1018 [2022-01-18 15:18:32,270 INFO L226 Difference]: Without dead ends: 1007 [2022-01-18 15:18:32,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:18:32,271 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:32,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 251 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 812 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-01-18 15:18:32,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-01-18 15:18:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 779. [2022-01-18 15:18:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.327763496143959) internal successors, (2589), 778 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2589 transitions. [2022-01-18 15:18:32,280 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2589 transitions. Word has length 21 [2022-01-18 15:18:32,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:32,280 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 2589 transitions. [2022-01-18 15:18:32,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2589 transitions. [2022-01-18 15:18:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:32,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:32,281 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:32,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Ended with exit code 0 [2022-01-18 15:18:32,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,536 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:32,481 INFO L402 AbstractCegarLoop]: === Iteration 548 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:32,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1534174711, now seen corresponding path program 536 times [2022-01-18 15:18:32,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:32,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426443202] [2022-01-18 15:18:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:32,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:32,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:32,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426443202] [2022-01-18 15:18:32,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426443202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:32,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607279296] [2022-01-18 15:18:32,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:32,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:32,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:32,581 INFO L229 MonitoredProcess]: Starting monitored process 537 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:32,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Waiting until timeout for monitored process [2022-01-18 15:18:32,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:32,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:32,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:32,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:32,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:32,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:32,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:18:32,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:32,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:32,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:32,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:32,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:32,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:32,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:32,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:32,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:32,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607279296] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:32,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:32,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:32,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815529127] [2022-01-18 15:18:32,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:32,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:32,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:32,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:32,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:32,960 INFO L87 Difference]: Start difference. First operand 779 states and 2589 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:33,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:33,172 INFO L93 Difference]: Finished difference Result 858 states and 2795 transitions. [2022-01-18 15:18:33,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:33,173 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:33,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:33,174 INFO L225 Difference]: With dead ends: 858 [2022-01-18 15:18:33,174 INFO L226 Difference]: Without dead ends: 845 [2022-01-18 15:18:33,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:33,174 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:33,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 171 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 556 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-01-18 15:18:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-01-18 15:18:33,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 780. [2022-01-18 15:18:33,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3273427471116817) internal successors, (2592), 779 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:33,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2592 transitions. [2022-01-18 15:18:33,182 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2592 transitions. Word has length 21 [2022-01-18 15:18:33,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:33,183 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2592 transitions. [2022-01-18 15:18:33,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:33,183 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2592 transitions. [2022-01-18 15:18:33,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:33,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:33,184 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:33,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Ended with exit code 0 [2022-01-18 15:18:33,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2022-01-18 15:18:33,384 INFO L402 AbstractCegarLoop]: === Iteration 549 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:33,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash -412029307, now seen corresponding path program 537 times [2022-01-18 15:18:33,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:33,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424434558] [2022-01-18 15:18:33,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:33,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:33,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:33,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424434558] [2022-01-18 15:18:33,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424434558] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:33,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301482043] [2022-01-18 15:18:33,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:33,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:33,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:33,484 INFO L229 MonitoredProcess]: Starting monitored process 538 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:33,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Waiting until timeout for monitored process [2022-01-18 15:18:33,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:18:33,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:33,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:33,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:33,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:33,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:33,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:33,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:18:33,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:33,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:33,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:33,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:33,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:33,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:33,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:33,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:33,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:33,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301482043] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:33,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:33,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:33,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933335723] [2022-01-18 15:18:33,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:33,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:33,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:33,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:33,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:33,936 INFO L87 Difference]: Start difference. First operand 780 states and 2592 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:34,060 INFO L93 Difference]: Finished difference Result 881 states and 2838 transitions. [2022-01-18 15:18:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:18:34,060 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:34,062 INFO L225 Difference]: With dead ends: 881 [2022-01-18 15:18:34,062 INFO L226 Difference]: Without dead ends: 855 [2022-01-18 15:18:34,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:34,062 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:34,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 193 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 329 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-01-18 15:18:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-01-18 15:18:34,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 782. [2022-01-18 15:18:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.3213828425096033) internal successors, (2594), 781 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2594 transitions. [2022-01-18 15:18:34,070 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2594 transitions. Word has length 21 [2022-01-18 15:18:34,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:34,070 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2594 transitions. [2022-01-18 15:18:34,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:34,071 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2594 transitions. [2022-01-18 15:18:34,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:34,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:34,071 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:34,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Ended with exit code 0 [2022-01-18 15:18:34,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,538 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:34,272 INFO L402 AbstractCegarLoop]: === Iteration 550 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash 81273861, now seen corresponding path program 538 times [2022-01-18 15:18:34,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:34,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244850051] [2022-01-18 15:18:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:34,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:34,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:34,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244850051] [2022-01-18 15:18:34,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244850051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:34,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229310439] [2022-01-18 15:18:34,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:34,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:34,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:34,372 INFO L229 MonitoredProcess]: Starting monitored process 539 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:34,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Waiting until timeout for monitored process [2022-01-18 15:18:34,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:34,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:34,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:34,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:34,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:34,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:34,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:34,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:18:34,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:34,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:34,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:34,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:34,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:34,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:34,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:34,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:34,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:34,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229310439] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:34,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:34,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:34,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579701427] [2022-01-18 15:18:34,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:34,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:34,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:34,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:34,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:34,873 INFO L87 Difference]: Start difference. First operand 782 states and 2594 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:35,055 INFO L93 Difference]: Finished difference Result 867 states and 2804 transitions. [2022-01-18 15:18:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:18:35,055 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:35,056 INFO L225 Difference]: With dead ends: 867 [2022-01-18 15:18:35,056 INFO L226 Difference]: Without dead ends: 847 [2022-01-18 15:18:35,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:35,056 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:35,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 202 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 516 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-01-18 15:18:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-01-18 15:18:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 771. [2022-01-18 15:18:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 3.3363636363636364) internal successors, (2569), 770 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2569 transitions. [2022-01-18 15:18:35,064 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2569 transitions. Word has length 21 [2022-01-18 15:18:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:35,065 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 2569 transitions. [2022-01-18 15:18:35,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2569 transitions. [2022-01-18 15:18:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:35,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:35,066 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:35,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:35,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2022-01-18 15:18:35,266 INFO L402 AbstractCegarLoop]: === Iteration 551 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:35,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:35,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2135238064, now seen corresponding path program 539 times [2022-01-18 15:18:35,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:35,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333625791] [2022-01-18 15:18:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:35,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:35,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:35,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333625791] [2022-01-18 15:18:35,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333625791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:35,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090094889] [2022-01-18 15:18:35,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:35,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:35,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:35,376 INFO L229 MonitoredProcess]: Starting monitored process 540 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:35,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Waiting until timeout for monitored process [2022-01-18 15:18:35,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:18:35,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:35,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:35,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:35,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:35,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:35,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:35,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:35,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:35,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:35,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:35,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:35,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:35,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:35,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:35,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:35,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090094889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:35,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:35,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:18:35,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182034445] [2022-01-18 15:18:35,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:35,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:35,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:35,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:35,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:35,815 INFO L87 Difference]: Start difference. First operand 771 states and 2569 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:36,163 INFO L93 Difference]: Finished difference Result 1016 states and 3291 transitions. [2022-01-18 15:18:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:18:36,163 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:36,165 INFO L225 Difference]: With dead ends: 1016 [2022-01-18 15:18:36,165 INFO L226 Difference]: Without dead ends: 993 [2022-01-18 15:18:36,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:18:36,165 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:36,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 195 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 667 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-18 15:18:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-01-18 15:18:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 771. [2022-01-18 15:18:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 3.3363636363636364) internal successors, (2569), 770 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2569 transitions. [2022-01-18 15:18:36,174 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2569 transitions. Word has length 21 [2022-01-18 15:18:36,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:36,174 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 2569 transitions. [2022-01-18 15:18:36,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:36,174 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2569 transitions. [2022-01-18 15:18:36,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:36,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:36,175 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:36,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Ended with exit code 0 [2022-01-18 15:18:36,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,540 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:36,376 INFO L402 AbstractCegarLoop]: === Iteration 552 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash 715615285, now seen corresponding path program 540 times [2022-01-18 15:18:36,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:36,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075699956] [2022-01-18 15:18:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:36,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:36,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:36,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075699956] [2022-01-18 15:18:36,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075699956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:36,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231503840] [2022-01-18 15:18:36,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:36,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:36,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:36,507 INFO L229 MonitoredProcess]: Starting monitored process 541 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:36,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Waiting until timeout for monitored process [2022-01-18 15:18:36,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:18:36,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:36,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:36,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:36,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:36,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:36,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:36,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:36,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:36,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:36,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:36,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:36,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:18:36,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:36,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:18:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:36,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231503840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:36,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:36,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:36,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042822187] [2022-01-18 15:18:36,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:36,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:36,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:36,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:36,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:36,960 INFO L87 Difference]: Start difference. First operand 771 states and 2569 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:37,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:37,341 INFO L93 Difference]: Finished difference Result 996 states and 3203 transitions. [2022-01-18 15:18:37,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:18:37,341 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:37,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:37,343 INFO L225 Difference]: With dead ends: 996 [2022-01-18 15:18:37,343 INFO L226 Difference]: Without dead ends: 975 [2022-01-18 15:18:37,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:37,343 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:37,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 239 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 846 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2022-01-18 15:18:37,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-01-18 15:18:37,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 769. [2022-01-18 15:18:37,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.3294270833333335) internal successors, (2557), 768 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2557 transitions. [2022-01-18 15:18:37,352 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2557 transitions. Word has length 21 [2022-01-18 15:18:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:37,352 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 2557 transitions. [2022-01-18 15:18:37,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:37,352 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2557 transitions. [2022-01-18 15:18:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:37,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:37,353 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:37,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Ended with exit code 0 [2022-01-18 15:18:37,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,541 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:37,553 INFO L402 AbstractCegarLoop]: === Iteration 553 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:37,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2031727910, now seen corresponding path program 541 times [2022-01-18 15:18:37,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:37,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453961686] [2022-01-18 15:18:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:37,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:37,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:37,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453961686] [2022-01-18 15:18:37,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453961686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:37,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795196027] [2022-01-18 15:18:37,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:37,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:37,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:37,671 INFO L229 MonitoredProcess]: Starting monitored process 542 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:37,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Waiting until timeout for monitored process [2022-01-18 15:18:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:37,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:37,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:37,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:37,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:37,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:37,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:37,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:37,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:38,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:38,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:18:38,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:38,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:38,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:38,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:38,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795196027] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:38,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:38,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:38,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973501848] [2022-01-18 15:18:38,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:38,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:38,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:38,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:38,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:38,124 INFO L87 Difference]: Start difference. First operand 769 states and 2557 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:38,406 INFO L93 Difference]: Finished difference Result 940 states and 3071 transitions. [2022-01-18 15:18:38,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:38,406 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:38,408 INFO L225 Difference]: With dead ends: 940 [2022-01-18 15:18:38,408 INFO L226 Difference]: Without dead ends: 921 [2022-01-18 15:18:38,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:38,408 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:38,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 195 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 611 Invalid, 0 Unknown, 146 Unchecked, 0.2s Time] [2022-01-18 15:18:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-01-18 15:18:38,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 770. [2022-01-18 15:18:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.331599479843953) internal successors, (2562), 769 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2562 transitions. [2022-01-18 15:18:38,417 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2562 transitions. Word has length 21 [2022-01-18 15:18:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:38,417 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 2562 transitions. [2022-01-18 15:18:38,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:38,417 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2562 transitions. [2022-01-18 15:18:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:38,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:38,418 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:38,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:38,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2022-01-18 15:18:38,618 INFO L402 AbstractCegarLoop]: === Iteration 554 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:38,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:38,618 INFO L85 PathProgramCache]: Analyzing trace with hash 739432302, now seen corresponding path program 542 times [2022-01-18 15:18:38,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:38,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526554315] [2022-01-18 15:18:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:38,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:38,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:38,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526554315] [2022-01-18 15:18:38,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526554315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:38,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592897202] [2022-01-18 15:18:38,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:38,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:38,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:38,735 INFO L229 MonitoredProcess]: Starting monitored process 543 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:38,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Waiting until timeout for monitored process [2022-01-18 15:18:38,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:38,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:38,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:38,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:38,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:38,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:38,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:38,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:38,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:38,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:39,090 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:39,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:18:39,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:39,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:39,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:39,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:39,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592897202] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:39,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:39,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:39,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409606434] [2022-01-18 15:18:39,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:39,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:39,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:39,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:39,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:39,186 INFO L87 Difference]: Start difference. First operand 770 states and 2562 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:39,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:39,436 INFO L93 Difference]: Finished difference Result 933 states and 3043 transitions. [2022-01-18 15:18:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:39,436 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:39,438 INFO L225 Difference]: With dead ends: 933 [2022-01-18 15:18:39,438 INFO L226 Difference]: Without dead ends: 918 [2022-01-18 15:18:39,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:39,438 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:39,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 153 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 521 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-01-18 15:18:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-01-18 15:18:39,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 772. [2022-01-18 15:18:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.3333333333333335) internal successors, (2570), 771 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2570 transitions. [2022-01-18 15:18:39,447 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2570 transitions. Word has length 21 [2022-01-18 15:18:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:39,447 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2570 transitions. [2022-01-18 15:18:39,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2570 transitions. [2022-01-18 15:18:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:39,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:39,448 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:39,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Ended with exit code 0 [2022-01-18 15:18:39,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2022-01-18 15:18:39,648 INFO L402 AbstractCegarLoop]: === Iteration 555 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash 421391792, now seen corresponding path program 543 times [2022-01-18 15:18:39,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:39,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019236528] [2022-01-18 15:18:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:39,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:39,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:39,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019236528] [2022-01-18 15:18:39,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019236528] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:39,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837633882] [2022-01-18 15:18:39,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:39,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:39,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:39,766 INFO L229 MonitoredProcess]: Starting monitored process 544 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:39,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Waiting until timeout for monitored process [2022-01-18 15:18:39,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:18:39,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:39,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:39,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:39,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:39,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:39,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:39,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:39,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:40,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:40,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:40,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:18:40,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:40,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:40,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:40,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:40,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837633882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:40,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:40,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:40,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018973283] [2022-01-18 15:18:40,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:40,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:40,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:40,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:40,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:40,235 INFO L87 Difference]: Start difference. First operand 772 states and 2570 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:40,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:40,497 INFO L93 Difference]: Finished difference Result 916 states and 2992 transitions. [2022-01-18 15:18:40,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:18:40,497 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:40,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:40,498 INFO L225 Difference]: With dead ends: 916 [2022-01-18 15:18:40,498 INFO L226 Difference]: Without dead ends: 909 [2022-01-18 15:18:40,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:40,499 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:40,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 169 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 546 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-18 15:18:40,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-18 15:18:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 773. [2022-01-18 15:18:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.332901554404145) internal successors, (2573), 772 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2573 transitions. [2022-01-18 15:18:40,516 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2573 transitions. Word has length 21 [2022-01-18 15:18:40,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:40,516 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 2573 transitions. [2022-01-18 15:18:40,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2573 transitions. [2022-01-18 15:18:40,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:40,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:40,517 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:40,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Ended with exit code 0 [2022-01-18 15:18:40,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2022-01-18 15:18:40,718 INFO L402 AbstractCegarLoop]: === Iteration 556 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:40,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:40,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1008307394, now seen corresponding path program 544 times [2022-01-18 15:18:40,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:40,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674284098] [2022-01-18 15:18:40,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:40,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:40,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:40,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674284098] [2022-01-18 15:18:40,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674284098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:40,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221137696] [2022-01-18 15:18:40,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:40,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:40,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:40,853 INFO L229 MonitoredProcess]: Starting monitored process 545 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:40,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Waiting until timeout for monitored process [2022-01-18 15:18:40,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:40,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:40,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:40,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:40,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:41,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:41,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:41,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:41,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:41,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:41,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:41,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:18:41,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:41,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:41,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:41,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:41,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221137696] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:41,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:41,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:41,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223493007] [2022-01-18 15:18:41,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:41,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:41,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:41,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:41,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:41,336 INFO L87 Difference]: Start difference. First operand 773 states and 2573 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:41,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:41,619 INFO L93 Difference]: Finished difference Result 994 states and 3193 transitions. [2022-01-18 15:18:41,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:18:41,620 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:41,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:41,621 INFO L225 Difference]: With dead ends: 994 [2022-01-18 15:18:41,621 INFO L226 Difference]: Without dead ends: 975 [2022-01-18 15:18:41,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:41,621 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 87 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:41,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 226 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 591 Invalid, 0 Unknown, 261 Unchecked, 0.2s Time] [2022-01-18 15:18:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-01-18 15:18:41,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 769. [2022-01-18 15:18:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.3294270833333335) internal successors, (2557), 768 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2557 transitions. [2022-01-18 15:18:41,630 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2557 transitions. Word has length 21 [2022-01-18 15:18:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:41,630 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 2557 transitions. [2022-01-18 15:18:41,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2557 transitions. [2022-01-18 15:18:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:41,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:41,631 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:41,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Ended with exit code 0 [2022-01-18 15:18:41,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,545 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:41,832 INFO L402 AbstractCegarLoop]: === Iteration 557 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:41,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1525376415, now seen corresponding path program 545 times [2022-01-18 15:18:41,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:41,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279517738] [2022-01-18 15:18:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:41,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:41,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:41,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279517738] [2022-01-18 15:18:41,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279517738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:41,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571514518] [2022-01-18 15:18:41,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:41,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:41,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:41,949 INFO L229 MonitoredProcess]: Starting monitored process 546 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:41,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Waiting until timeout for monitored process [2022-01-18 15:18:41,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:41,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:41,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:41,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:42,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:42,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:42,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:42,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:42,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:42,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:42,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:42,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:42,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:42,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:42,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:18:42,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:42,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:18:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:42,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571514518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:42,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:42,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:18:42,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577859406] [2022-01-18 15:18:42,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:42,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:42,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:42,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:42,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:42,533 INFO L87 Difference]: Start difference. First operand 769 states and 2557 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:42,887 INFO L93 Difference]: Finished difference Result 1055 states and 3376 transitions. [2022-01-18 15:18:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:18:42,888 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:42,889 INFO L225 Difference]: With dead ends: 1055 [2022-01-18 15:18:42,889 INFO L226 Difference]: Without dead ends: 1028 [2022-01-18 15:18:42,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:18:42,889 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 75 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:42,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 210 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 642 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2022-01-18 15:18:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2022-01-18 15:18:42,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 772. [2022-01-18 15:18:42,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.330739299610895) internal successors, (2568), 771 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:42,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2568 transitions. [2022-01-18 15:18:42,899 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2568 transitions. Word has length 21 [2022-01-18 15:18:42,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:42,899 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2568 transitions. [2022-01-18 15:18:42,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2568 transitions. [2022-01-18 15:18:42,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:42,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:42,900 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:42,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Ended with exit code 0 [2022-01-18 15:18:43,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2022-01-18 15:18:43,100 INFO L402 AbstractCegarLoop]: === Iteration 558 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:43,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:43,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1478691047, now seen corresponding path program 546 times [2022-01-18 15:18:43,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:43,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599960480] [2022-01-18 15:18:43,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:43,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:43,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599960480] [2022-01-18 15:18:43,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599960480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850443051] [2022-01-18 15:18:43,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:43,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:43,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:43,206 INFO L229 MonitoredProcess]: Starting monitored process 547 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:43,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Waiting until timeout for monitored process [2022-01-18 15:18:43,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:18:43,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:43,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:43,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:43,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:43,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:43,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:18:43,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:43,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:43,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:43,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:43,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:43,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:43,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:43,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:43,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:43,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850443051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:43,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:43,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:43,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429833272] [2022-01-18 15:18:43,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:43,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:43,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:43,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:43,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:43,591 INFO L87 Difference]: Start difference. First operand 772 states and 2568 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:43,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:43,816 INFO L93 Difference]: Finished difference Result 875 states and 2849 transitions. [2022-01-18 15:18:43,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:18:43,817 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:43,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:43,818 INFO L225 Difference]: With dead ends: 875 [2022-01-18 15:18:43,818 INFO L226 Difference]: Without dead ends: 846 [2022-01-18 15:18:43,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:43,818 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:43,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 191 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 628 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-01-18 15:18:43,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-01-18 15:18:43,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 772. [2022-01-18 15:18:43,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.330739299610895) internal successors, (2568), 771 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:43,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2568 transitions. [2022-01-18 15:18:43,826 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2568 transitions. Word has length 21 [2022-01-18 15:18:43,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:43,826 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2568 transitions. [2022-01-18 15:18:43,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:43,826 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2568 transitions. [2022-01-18 15:18:43,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:43,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:43,827 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:43,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Ended with exit code 0 [2022-01-18 15:18:44,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 547 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2022-01-18 15:18:44,028 INFO L402 AbstractCegarLoop]: === Iteration 559 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:44,028 INFO L85 PathProgramCache]: Analyzing trace with hash 644712935, now seen corresponding path program 547 times [2022-01-18 15:18:44,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:44,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124172148] [2022-01-18 15:18:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:44,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:44,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:44,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124172148] [2022-01-18 15:18:44,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124172148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:44,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174655721] [2022-01-18 15:18:44,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:44,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:44,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:44,129 INFO L229 MonitoredProcess]: Starting monitored process 548 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:44,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Waiting until timeout for monitored process [2022-01-18 15:18:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:44,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:44,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:44,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:44,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:44,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:18:44,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:44,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:44,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:44,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:44,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:44,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:44,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:44,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:44,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:44,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174655721] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:44,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:44,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:44,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896471525] [2022-01-18 15:18:44,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:44,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:44,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:44,538 INFO L87 Difference]: Start difference. First operand 772 states and 2568 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:44,715 INFO L93 Difference]: Finished difference Result 851 states and 2777 transitions. [2022-01-18 15:18:44,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:18:44,715 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:44,716 INFO L225 Difference]: With dead ends: 851 [2022-01-18 15:18:44,717 INFO L226 Difference]: Without dead ends: 838 [2022-01-18 15:18:44,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:44,717 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:44,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 153 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 467 Invalid, 0 Unknown, 143 Unchecked, 0.2s Time] [2022-01-18 15:18:44,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-01-18 15:18:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 772. [2022-01-18 15:18:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.330739299610895) internal successors, (2568), 771 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2568 transitions. [2022-01-18 15:18:44,725 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2568 transitions. Word has length 21 [2022-01-18 15:18:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:44,725 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2568 transitions. [2022-01-18 15:18:44,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:44,725 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2568 transitions. [2022-01-18 15:18:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:44,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:44,726 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:44,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Ended with exit code 0 [2022-01-18 15:18:44,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2022-01-18 15:18:44,926 INFO L402 AbstractCegarLoop]: === Iteration 560 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:44,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:44,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1766858339, now seen corresponding path program 548 times [2022-01-18 15:18:44,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:44,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208190587] [2022-01-18 15:18:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:44,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:45,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:45,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208190587] [2022-01-18 15:18:45,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208190587] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:45,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064635555] [2022-01-18 15:18:45,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:45,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:45,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:45,030 INFO L229 MonitoredProcess]: Starting monitored process 549 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:45,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Waiting until timeout for monitored process [2022-01-18 15:18:45,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:45,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:45,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:45,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:45,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:45,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:45,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:45,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:18:45,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:45,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:45,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:45,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:45,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:45,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:45,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:45,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:45,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:45,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064635555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:45,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:45,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:45,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338043923] [2022-01-18 15:18:45,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:45,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:45,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:45,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:45,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:45,546 INFO L87 Difference]: Start difference. First operand 772 states and 2568 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:45,751 INFO L93 Difference]: Finished difference Result 938 states and 2955 transitions. [2022-01-18 15:18:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:18:45,751 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:45,753 INFO L225 Difference]: With dead ends: 938 [2022-01-18 15:18:45,753 INFO L226 Difference]: Without dead ends: 912 [2022-01-18 15:18:45,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:45,753 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:45,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 233 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 510 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2022-01-18 15:18:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-01-18 15:18:45,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 789. [2022-01-18 15:18:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 3.3083756345177666) internal successors, (2607), 788 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2607 transitions. [2022-01-18 15:18:45,762 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2607 transitions. Word has length 21 [2022-01-18 15:18:45,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:45,762 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 2607 transitions. [2022-01-18 15:18:45,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2607 transitions. [2022-01-18 15:18:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:45,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:45,763 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:45,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:45,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 549 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2022-01-18 15:18:45,963 INFO L402 AbstractCegarLoop]: === Iteration 561 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:45,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:45,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2034805789, now seen corresponding path program 549 times [2022-01-18 15:18:45,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:45,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77229375] [2022-01-18 15:18:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:45,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:46,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:46,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77229375] [2022-01-18 15:18:46,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77229375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:46,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151701985] [2022-01-18 15:18:46,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:46,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:46,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:46,065 INFO L229 MonitoredProcess]: Starting monitored process 550 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:46,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (550)] Waiting until timeout for monitored process [2022-01-18 15:18:46,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:18:46,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:46,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:46,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:46,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:46,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:46,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:46,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:18:46,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:46,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:46,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:46,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:46,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:46,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:46,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:46,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:46,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:46,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151701985] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:46,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:46,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:46,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416850104] [2022-01-18 15:18:46,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:46,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:46,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:46,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:46,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:46,620 INFO L87 Difference]: Start difference. First operand 789 states and 2607 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:46,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:46,739 INFO L93 Difference]: Finished difference Result 911 states and 2893 transitions. [2022-01-18 15:18:46,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:18:46,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:46,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:46,740 INFO L225 Difference]: With dead ends: 911 [2022-01-18 15:18:46,740 INFO L226 Difference]: Without dead ends: 895 [2022-01-18 15:18:46,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:46,740 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:46,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 228 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 317 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2022-01-18 15:18:46,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-01-18 15:18:46,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 787. [2022-01-18 15:18:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.3104325699745547) internal successors, (2602), 786 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2602 transitions. [2022-01-18 15:18:46,753 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2602 transitions. Word has length 21 [2022-01-18 15:18:46,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:46,753 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 2602 transitions. [2022-01-18 15:18:46,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:46,753 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2602 transitions. [2022-01-18 15:18:46,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:46,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:46,755 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:46,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (550)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:46,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,550 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:46,977 INFO L402 AbstractCegarLoop]: === Iteration 562 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:46,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1430766955, now seen corresponding path program 550 times [2022-01-18 15:18:46,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:46,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633269314] [2022-01-18 15:18:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:46,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:47,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:47,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633269314] [2022-01-18 15:18:47,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633269314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:47,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795544128] [2022-01-18 15:18:47,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:47,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:47,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:47,087 INFO L229 MonitoredProcess]: Starting monitored process 551 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:47,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (551)] Waiting until timeout for monitored process [2022-01-18 15:18:47,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:47,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:47,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:47,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:47,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:47,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:47,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:47,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:47,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:47,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:47,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:47,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:47,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:47,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:18:47,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:47,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:18:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:47,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795544128] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:47,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:47,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:47,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553706508] [2022-01-18 15:18:47,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:47,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:47,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:47,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:47,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:47,612 INFO L87 Difference]: Start difference. First operand 787 states and 2602 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:47,901 INFO L93 Difference]: Finished difference Result 1049 states and 3353 transitions. [2022-01-18 15:18:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:18:47,901 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:47,903 INFO L225 Difference]: With dead ends: 1049 [2022-01-18 15:18:47,903 INFO L226 Difference]: Without dead ends: 1007 [2022-01-18 15:18:47,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:47,903 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:47,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 188 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 638 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-01-18 15:18:47,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-01-18 15:18:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 793. [2022-01-18 15:18:47,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.313131313131313) internal successors, (2624), 792 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:47,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2624 transitions. [2022-01-18 15:18:47,912 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2624 transitions. Word has length 21 [2022-01-18 15:18:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:47,913 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 2624 transitions. [2022-01-18 15:18:47,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:47,913 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2624 transitions. [2022-01-18 15:18:47,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:47,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:47,914 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:47,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (551)] Ended with exit code 0 [2022-01-18 15:18:48,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable561 [2022-01-18 15:18:48,114 INFO L402 AbstractCegarLoop]: === Iteration 563 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:48,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:48,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2017682557, now seen corresponding path program 551 times [2022-01-18 15:18:48,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:48,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320442850] [2022-01-18 15:18:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:48,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:48,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:48,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320442850] [2022-01-18 15:18:48,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320442850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:48,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120906893] [2022-01-18 15:18:48,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:48,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:48,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:48,223 INFO L229 MonitoredProcess]: Starting monitored process 552 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:48,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Waiting until timeout for monitored process [2022-01-18 15:18:48,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:48,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:48,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:48,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:48,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:48,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:48,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:48,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:48,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:48,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:48,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:48,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:48,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:48,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:18:48,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:48,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:18:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:48,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120906893] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:48,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:48,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:48,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468064275] [2022-01-18 15:18:48,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:48,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:48,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:48,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:48,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:48,760 INFO L87 Difference]: Start difference. First operand 793 states and 2624 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:49,115 INFO L93 Difference]: Finished difference Result 1059 states and 3351 transitions. [2022-01-18 15:18:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:18:49,115 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:49,117 INFO L225 Difference]: With dead ends: 1059 [2022-01-18 15:18:49,117 INFO L226 Difference]: Without dead ends: 1029 [2022-01-18 15:18:49,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:49,117 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:49,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 269 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 862 Invalid, 0 Unknown, 10 Unchecked, 0.3s Time] [2022-01-18 15:18:49,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2022-01-18 15:18:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 799. [2022-01-18 15:18:49,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.305764411027569) internal successors, (2638), 798 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2638 transitions. [2022-01-18 15:18:49,126 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2638 transitions. Word has length 21 [2022-01-18 15:18:49,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:49,126 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 2638 transitions. [2022-01-18 15:18:49,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2638 transitions. [2022-01-18 15:18:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:49,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:49,128 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:49,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Ended with exit code 0 [2022-01-18 15:18:49,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2022-01-18 15:18:49,328 INFO L402 AbstractCegarLoop]: === Iteration 564 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1342300629, now seen corresponding path program 552 times [2022-01-18 15:18:49,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:49,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790213056] [2022-01-18 15:18:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:49,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:49,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:49,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790213056] [2022-01-18 15:18:49,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790213056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:49,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316923246] [2022-01-18 15:18:49,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:49,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:49,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:49,438 INFO L229 MonitoredProcess]: Starting monitored process 553 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:49,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (553)] Waiting until timeout for monitored process [2022-01-18 15:18:49,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:18:49,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:49,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:49,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:49,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:49,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:49,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:49,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:49,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:49,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:49,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:49,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:49,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:49,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:18:49,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:49,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:18:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:49,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316923246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:49,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:49,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:49,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903445718] [2022-01-18 15:18:49,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:49,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:49,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:49,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:49,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:49,990 INFO L87 Difference]: Start difference. First operand 799 states and 2638 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:50,257 INFO L93 Difference]: Finished difference Result 1044 states and 3311 transitions. [2022-01-18 15:18:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:18:50,257 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:50,259 INFO L225 Difference]: With dead ends: 1044 [2022-01-18 15:18:50,259 INFO L226 Difference]: Without dead ends: 1026 [2022-01-18 15:18:50,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:50,259 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 89 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:50,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 192 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 553 Invalid, 0 Unknown, 195 Unchecked, 0.2s Time] [2022-01-18 15:18:50,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-01-18 15:18:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 789. [2022-01-18 15:18:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 3.313451776649746) internal successors, (2611), 788 states have internal predecessors, (2611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2611 transitions. [2022-01-18 15:18:50,269 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2611 transitions. Word has length 21 [2022-01-18 15:18:50,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:50,269 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 2611 transitions. [2022-01-18 15:18:50,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:50,270 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2611 transitions. [2022-01-18 15:18:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:50,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:50,270 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:50,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (553)] Ended with exit code 0 [2022-01-18 15:18:50,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2022-01-18 15:18:50,471 INFO L402 AbstractCegarLoop]: === Iteration 565 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1392544211, now seen corresponding path program 553 times [2022-01-18 15:18:50,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:50,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323467773] [2022-01-18 15:18:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:50,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:50,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:50,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323467773] [2022-01-18 15:18:50,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323467773] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:50,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108299352] [2022-01-18 15:18:50,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:50,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:50,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:50,575 INFO L229 MonitoredProcess]: Starting monitored process 554 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:50,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (554)] Waiting until timeout for monitored process [2022-01-18 15:18:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:50,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:50,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:50,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:50,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:50,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:50,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:18:50,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:50,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:18:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:50,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:50,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:50,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:51,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:51,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:51,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:51,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:18:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:51,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108299352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:51,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:51,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:18:51,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662970665] [2022-01-18 15:18:51,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:51,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:18:51,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:18:51,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:51,069 INFO L87 Difference]: Start difference. First operand 789 states and 2611 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:51,211 INFO L93 Difference]: Finished difference Result 902 states and 2884 transitions. [2022-01-18 15:18:51,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:18:51,211 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:51,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:51,212 INFO L225 Difference]: With dead ends: 902 [2022-01-18 15:18:51,212 INFO L226 Difference]: Without dead ends: 842 [2022-01-18 15:18:51,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:18:51,212 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:51,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 151 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 380 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-01-18 15:18:51,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-01-18 15:18:51,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 770. [2022-01-18 15:18:51,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.330299089726918) internal successors, (2561), 769 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2561 transitions. [2022-01-18 15:18:51,221 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2561 transitions. Word has length 21 [2022-01-18 15:18:51,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:51,221 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 2561 transitions. [2022-01-18 15:18:51,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2561 transitions. [2022-01-18 15:18:51,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:51,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:51,222 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:51,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (554)] Ended with exit code 0 [2022-01-18 15:18:51,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2022-01-18 15:18:51,422 INFO L402 AbstractCegarLoop]: === Iteration 566 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:51,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1098797122, now seen corresponding path program 554 times [2022-01-18 15:18:51,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:51,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800564845] [2022-01-18 15:18:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:51,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:51,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:51,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800564845] [2022-01-18 15:18:51,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800564845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:51,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313960539] [2022-01-18 15:18:51,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:51,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:51,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:51,539 INFO L229 MonitoredProcess]: Starting monitored process 555 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:51,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Waiting until timeout for monitored process [2022-01-18 15:18:51,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:51,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:51,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:51,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:51,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:51,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:51,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:18:51,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:51,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:18:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:51,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:51,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:51,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:18:51,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:51,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:51,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:51,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:52,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313960539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:52,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:52,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:18:52,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526225937] [2022-01-18 15:18:52,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:52,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:18:52,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:52,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:18:52,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:18:52,017 INFO L87 Difference]: Start difference. First operand 770 states and 2561 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:52,433 INFO L93 Difference]: Finished difference Result 1067 states and 3399 transitions. [2022-01-18 15:18:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:18:52,434 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:52,435 INFO L225 Difference]: With dead ends: 1067 [2022-01-18 15:18:52,435 INFO L226 Difference]: Without dead ends: 1044 [2022-01-18 15:18:52,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:18:52,436 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 67 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:52,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 255 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 708 Invalid, 0 Unknown, 134 Unchecked, 0.3s Time] [2022-01-18 15:18:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-01-18 15:18:52,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 772. [2022-01-18 15:18:52,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.3281452658884567) internal successors, (2566), 771 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:52,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2566 transitions. [2022-01-18 15:18:52,445 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2566 transitions. Word has length 21 [2022-01-18 15:18:52,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:52,445 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2566 transitions. [2022-01-18 15:18:52,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2566 transitions. [2022-01-18 15:18:52,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:52,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:52,446 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:52,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:52,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 555 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2022-01-18 15:18:52,647 INFO L402 AbstractCegarLoop]: === Iteration 567 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:52,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:52,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1933420152, now seen corresponding path program 555 times [2022-01-18 15:18:52,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:52,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757443399] [2022-01-18 15:18:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:52,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:52,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:52,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757443399] [2022-01-18 15:18:52,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757443399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:52,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819863284] [2022-01-18 15:18:52,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:52,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:52,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:52,768 INFO L229 MonitoredProcess]: Starting monitored process 556 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:52,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (556)] Waiting until timeout for monitored process [2022-01-18 15:18:52,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:18:52,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:52,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:52,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:52,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:52,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:52,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:52,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:52,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:53,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:53,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:53,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:18:53,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:53,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:53,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:53,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:53,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819863284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:53,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:53,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:53,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866750184] [2022-01-18 15:18:53,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:53,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:53,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:53,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:53,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:53,248 INFO L87 Difference]: Start difference. First operand 772 states and 2566 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:53,512 INFO L93 Difference]: Finished difference Result 988 states and 3180 transitions. [2022-01-18 15:18:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:18:53,512 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:53,514 INFO L225 Difference]: With dead ends: 988 [2022-01-18 15:18:53,514 INFO L226 Difference]: Without dead ends: 969 [2022-01-18 15:18:53,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:53,514 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:53,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 191 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 531 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-18 15:18:53,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-01-18 15:18:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 774. [2022-01-18 15:18:53,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.3285899094437257) internal successors, (2573), 773 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2573 transitions. [2022-01-18 15:18:53,524 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2573 transitions. Word has length 21 [2022-01-18 15:18:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:53,524 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 2573 transitions. [2022-01-18 15:18:53,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:53,524 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2573 transitions. [2022-01-18 15:18:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:53,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:53,525 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:53,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (556)] Forceful destruction successful, exit code 0 [2022-01-18 15:18:53,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2022-01-18 15:18:53,725 INFO L402 AbstractCegarLoop]: === Iteration 568 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:53,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:53,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1052981092, now seen corresponding path program 556 times [2022-01-18 15:18:53,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:53,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496074056] [2022-01-18 15:18:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:53,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:53,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:53,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496074056] [2022-01-18 15:18:53,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496074056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:53,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304447163] [2022-01-18 15:18:53,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:18:53,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:53,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:53,839 INFO L229 MonitoredProcess]: Starting monitored process 557 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:53,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Waiting until timeout for monitored process [2022-01-18 15:18:53,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:18:53,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:53,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:53,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:53,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:54,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:54,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:54,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:54,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:54,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:54,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:54,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:18:54,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:54,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:54,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:54,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:54,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304447163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:54,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:54,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:54,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635988092] [2022-01-18 15:18:54,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:54,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:54,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:54,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:54,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:54,329 INFO L87 Difference]: Start difference. First operand 774 states and 2573 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:54,639 INFO L93 Difference]: Finished difference Result 1010 states and 3227 transitions. [2022-01-18 15:18:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:18:54,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:54,641 INFO L225 Difference]: With dead ends: 1010 [2022-01-18 15:18:54,641 INFO L226 Difference]: Without dead ends: 995 [2022-01-18 15:18:54,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:54,641 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 84 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:54,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 226 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 669 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-01-18 15:18:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-01-18 15:18:54,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 780. [2022-01-18 15:18:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3209242618741976) internal successors, (2587), 779 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2587 transitions. [2022-01-18 15:18:54,650 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2587 transitions. Word has length 21 [2022-01-18 15:18:54,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:54,650 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2587 transitions. [2022-01-18 15:18:54,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2587 transitions. [2022-01-18 15:18:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:54,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:54,651 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:54,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Ended with exit code 0 [2022-01-18 15:18:54,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 557 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2022-01-18 15:18:54,852 INFO L402 AbstractCegarLoop]: === Iteration 569 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:54,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:54,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1752813114, now seen corresponding path program 557 times [2022-01-18 15:18:54,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:54,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586643379] [2022-01-18 15:18:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:54,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:54,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:54,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586643379] [2022-01-18 15:18:54,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586643379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:54,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810153333] [2022-01-18 15:18:54,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:18:54,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:54,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:54,973 INFO L229 MonitoredProcess]: Starting monitored process 558 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:54,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Waiting until timeout for monitored process [2022-01-18 15:18:54,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:18:54,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:54,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:54,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:55,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:55,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:55,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:55,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:55,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:55,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:55,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:55,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:55,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:18:55,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:55,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:18:55,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:55,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:18:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:55,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810153333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:55,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:55,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:55,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769864489] [2022-01-18 15:18:55,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:55,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:55,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:55,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:55,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:55,696 INFO L87 Difference]: Start difference. First operand 780 states and 2587 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:55,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:55,944 INFO L93 Difference]: Finished difference Result 968 states and 3113 transitions. [2022-01-18 15:18:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:18:55,944 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:55,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:55,945 INFO L225 Difference]: With dead ends: 968 [2022-01-18 15:18:55,946 INFO L226 Difference]: Without dead ends: 965 [2022-01-18 15:18:55,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:18:55,946 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:55,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 243 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 503 Invalid, 0 Unknown, 194 Unchecked, 0.2s Time] [2022-01-18 15:18:55,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-01-18 15:18:55,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 770. [2022-01-18 15:18:55,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.330299089726918) internal successors, (2561), 769 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:55,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2561 transitions. [2022-01-18 15:18:55,955 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2561 transitions. Word has length 21 [2022-01-18 15:18:55,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:55,955 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 2561 transitions. [2022-01-18 15:18:55,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2561 transitions. [2022-01-18 15:18:55,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:55,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:55,956 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:55,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Ended with exit code 0 [2022-01-18 15:18:56,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,558 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:56,156 INFO L402 AbstractCegarLoop]: === Iteration 570 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:56,156 INFO L85 PathProgramCache]: Analyzing trace with hash -727582733, now seen corresponding path program 558 times [2022-01-18 15:18:56,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:56,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91753412] [2022-01-18 15:18:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:56,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:56,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:56,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91753412] [2022-01-18 15:18:56,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91753412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:56,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162454745] [2022-01-18 15:18:56,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:18:56,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:56,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:56,265 INFO L229 MonitoredProcess]: Starting monitored process 559 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:56,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (559)] Waiting until timeout for monitored process [2022-01-18 15:18:56,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:18:56,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:56,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:56,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:56,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:56,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:56,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:56,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:56,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:56,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:56,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:56,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:56,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:56,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:18:56,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:56,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:18:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:56,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162454745] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:56,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:56,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:56,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740039336] [2022-01-18 15:18:56,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:56,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:56,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:56,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:56,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:56,722 INFO L87 Difference]: Start difference. First operand 770 states and 2561 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:57,014 INFO L93 Difference]: Finished difference Result 1001 states and 3223 transitions. [2022-01-18 15:18:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:18:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:57,016 INFO L225 Difference]: With dead ends: 1001 [2022-01-18 15:18:57,016 INFO L226 Difference]: Without dead ends: 980 [2022-01-18 15:18:57,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:57,016 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:57,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 203 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 668 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-01-18 15:18:57,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-01-18 15:18:57,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 770. [2022-01-18 15:18:57,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.330299089726918) internal successors, (2561), 769 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:57,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2561 transitions. [2022-01-18 15:18:57,025 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2561 transitions. Word has length 21 [2022-01-18 15:18:57,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:57,025 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 2561 transitions. [2022-01-18 15:18:57,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2561 transitions. [2022-01-18 15:18:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:57,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:57,026 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:57,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (559)] Ended with exit code 0 [2022-01-18 15:18:57,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2022-01-18 15:18:57,227 INFO L402 AbstractCegarLoop]: === Iteration 571 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:57,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:57,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1045623243, now seen corresponding path program 559 times [2022-01-18 15:18:57,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:57,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187984299] [2022-01-18 15:18:57,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:57,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:57,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:57,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187984299] [2022-01-18 15:18:57,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187984299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:57,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110398948] [2022-01-18 15:18:57,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:18:57,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:57,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:57,336 INFO L229 MonitoredProcess]: Starting monitored process 560 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:57,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (560)] Waiting until timeout for monitored process [2022-01-18 15:18:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:57,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:57,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:57,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:57,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:57,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:57,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:57,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:57,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:57,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:57,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:57,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:57,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:18:57,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:57,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:18:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:57,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110398948] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:57,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:57,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:57,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117404534] [2022-01-18 15:18:57,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:57,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:57,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:57,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:57,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:57,814 INFO L87 Difference]: Start difference. First operand 770 states and 2561 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:58,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:58,067 INFO L93 Difference]: Finished difference Result 975 states and 3152 transitions. [2022-01-18 15:18:58,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:18:58,067 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:58,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:58,069 INFO L225 Difference]: With dead ends: 975 [2022-01-18 15:18:58,069 INFO L226 Difference]: Without dead ends: 966 [2022-01-18 15:18:58,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:58,069 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:58,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 160 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 553 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-18 15:18:58,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-01-18 15:18:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 770. [2022-01-18 15:18:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.330299089726918) internal successors, (2561), 769 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2561 transitions. [2022-01-18 15:18:58,078 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2561 transitions. Word has length 21 [2022-01-18 15:18:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:58,078 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 2561 transitions. [2022-01-18 15:18:58,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2561 transitions. [2022-01-18 15:18:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:58,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:58,079 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:58,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (560)] Ended with exit code 0 [2022-01-18 15:18:58,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,560 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:58,279 INFO L402 AbstractCegarLoop]: === Iteration 572 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:58,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:58,280 INFO L85 PathProgramCache]: Analyzing trace with hash -458707641, now seen corresponding path program 560 times [2022-01-18 15:18:58,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:58,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844034702] [2022-01-18 15:18:58,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:58,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:58,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:58,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844034702] [2022-01-18 15:18:58,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844034702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:58,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956200276] [2022-01-18 15:18:58,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:18:58,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:58,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:58,388 INFO L229 MonitoredProcess]: Starting monitored process 561 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:58,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Waiting until timeout for monitored process [2022-01-18 15:18:58,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:18:58,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:18:58,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:58,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:58,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:58,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:58,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:58,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:58,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:58,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:58,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:18:58,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:58,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:18:58,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:58,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:18:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:58,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956200276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:18:58,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:18:58,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:18:58,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111587760] [2022-01-18 15:18:58,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:18:58,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:18:58,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:18:58,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:18:58,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:18:58,873 INFO L87 Difference]: Start difference. First operand 770 states and 2561 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:18:59,117 INFO L93 Difference]: Finished difference Result 1003 states and 3217 transitions. [2022-01-18 15:18:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:18:59,118 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:18:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:18:59,119 INFO L225 Difference]: With dead ends: 1003 [2022-01-18 15:18:59,119 INFO L226 Difference]: Without dead ends: 988 [2022-01-18 15:18:59,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:18:59,119 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:18:59,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 167 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 513 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-01-18 15:18:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2022-01-18 15:18:59,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 776. [2022-01-18 15:18:59,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.3225806451612905) internal successors, (2575), 775 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:59,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2575 transitions. [2022-01-18 15:18:59,129 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2575 transitions. Word has length 21 [2022-01-18 15:18:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:18:59,129 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 2575 transitions. [2022-01-18 15:18:59,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:18:59,129 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2575 transitions. [2022-01-18 15:18:59,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:18:59,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:18:59,130 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:18:59,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Ended with exit code 0 [2022-01-18 15:18:59,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,561 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:59,330 INFO L402 AbstractCegarLoop]: === Iteration 573 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:18:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:18:59,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1134089569, now seen corresponding path program 561 times [2022-01-18 15:18:59,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:18:59,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732908030] [2022-01-18 15:18:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:18:59,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:18:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:18:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:59,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:18:59,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732908030] [2022-01-18 15:18:59,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732908030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:18:59,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481876708] [2022-01-18 15:18:59,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:18:59,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:18:59,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:18:59,440 INFO L229 MonitoredProcess]: Starting monitored process 562 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:18:59,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Waiting until timeout for monitored process [2022-01-18 15:18:59,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:18:59,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:18:59,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:18:59,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:18:59,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:59,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:59,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:18:59,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:18:59,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:18:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:18:59,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:18:59,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:59,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-18 15:18:59,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:59,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 15:18:59,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:18:59,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-01-18 15:19:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:00,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481876708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:00,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:00,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:00,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063117930] [2022-01-18 15:19:00,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:00,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:00,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:00,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:00,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:00,024 INFO L87 Difference]: Start difference. First operand 776 states and 2575 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:00,536 INFO L93 Difference]: Finished difference Result 1124 states and 3562 transitions. [2022-01-18 15:19:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:19:00,536 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:00,538 INFO L225 Difference]: With dead ends: 1124 [2022-01-18 15:19:00,538 INFO L226 Difference]: Without dead ends: 1058 [2022-01-18 15:19:00,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:19:00,538 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 84 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:00,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 271 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 864 Invalid, 0 Unknown, 7 Unchecked, 0.3s Time] [2022-01-18 15:19:00,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-01-18 15:19:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 777. [2022-01-18 15:19:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.329896907216495) internal successors, (2584), 776 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2584 transitions. [2022-01-18 15:19:00,547 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2584 transitions. Word has length 21 [2022-01-18 15:19:00,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:00,547 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 2584 transitions. [2022-01-18 15:19:00,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2584 transitions. [2022-01-18 15:19:00,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:00,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:00,548 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:00,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Ended with exit code 0 [2022-01-18 15:19:00,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,562 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:00,749 INFO L402 AbstractCegarLoop]: === Iteration 574 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:00,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:00,749 INFO L85 PathProgramCache]: Analyzing trace with hash 426532036, now seen corresponding path program 562 times [2022-01-18 15:19:00,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:00,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936940275] [2022-01-18 15:19:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:00,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:00,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:00,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936940275] [2022-01-18 15:19:00,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936940275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:00,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780413842] [2022-01-18 15:19:00,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:00,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:00,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:00,872 INFO L229 MonitoredProcess]: Starting monitored process 563 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:00,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Waiting until timeout for monitored process [2022-01-18 15:19:00,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:00,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:00,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:00,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:00,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:00,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:01,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:01,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:01,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:01,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:01,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:01,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:01,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:01,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:01,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:19:01,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:01,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:19:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:01,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780413842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:01,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:01,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:01,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082471113] [2022-01-18 15:19:01,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:01,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:01,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:01,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:01,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:01,340 INFO L87 Difference]: Start difference. First operand 777 states and 2584 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:01,691 INFO L93 Difference]: Finished difference Result 1006 states and 3267 transitions. [2022-01-18 15:19:01,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:19:01,692 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:01,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:01,693 INFO L225 Difference]: With dead ends: 1006 [2022-01-18 15:19:01,693 INFO L226 Difference]: Without dead ends: 983 [2022-01-18 15:19:01,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:19:01,693 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:01,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 217 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 681 Invalid, 0 Unknown, 183 Unchecked, 0.2s Time] [2022-01-18 15:19:01,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-01-18 15:19:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 780. [2022-01-18 15:19:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3324775353016687) internal successors, (2596), 779 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2596 transitions. [2022-01-18 15:19:01,702 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2596 transitions. Word has length 21 [2022-01-18 15:19:01,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:01,702 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2596 transitions. [2022-01-18 15:19:01,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:01,702 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2596 transitions. [2022-01-18 15:19:01,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:01,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:01,703 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:01,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Ended with exit code 0 [2022-01-18 15:19:01,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2022-01-18 15:19:01,904 INFO L402 AbstractCegarLoop]: === Iteration 575 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1029773033, now seen corresponding path program 563 times [2022-01-18 15:19:01,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:01,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107796216] [2022-01-18 15:19:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:01,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:02,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:02,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107796216] [2022-01-18 15:19:02,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107796216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:02,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561126431] [2022-01-18 15:19:02,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:02,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:02,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:02,035 INFO L229 MonitoredProcess]: Starting monitored process 564 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:02,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (564)] Waiting until timeout for monitored process [2022-01-18 15:19:02,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:19:02,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:02,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:02,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:02,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:02,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:02,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:02,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:02,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:02,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:02,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:02,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:02,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:02,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:02,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:02,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:02,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:02,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561126431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:02,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:02,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:19:02,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247272775] [2022-01-18 15:19:02,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:02,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:19:02,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:02,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:19:02,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:02,560 INFO L87 Difference]: Start difference. First operand 780 states and 2596 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:03,022 INFO L93 Difference]: Finished difference Result 1165 states and 3721 transitions. [2022-01-18 15:19:03,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:19:03,023 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:03,024 INFO L225 Difference]: With dead ends: 1165 [2022-01-18 15:19:03,024 INFO L226 Difference]: Without dead ends: 1138 [2022-01-18 15:19:03,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:19:03,025 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:03,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 215 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 655 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-01-18 15:19:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-01-18 15:19:03,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 780. [2022-01-18 15:19:03,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3324775353016687) internal successors, (2596), 779 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2596 transitions. [2022-01-18 15:19:03,034 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2596 transitions. Word has length 21 [2022-01-18 15:19:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:03,035 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2596 transitions. [2022-01-18 15:19:03,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2596 transitions. [2022-01-18 15:19:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:03,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:03,036 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:03,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (564)] Ended with exit code 0 [2022-01-18 15:19:03,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2022-01-18 15:19:03,236 INFO L402 AbstractCegarLoop]: === Iteration 576 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:03,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:03,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1837830956, now seen corresponding path program 564 times [2022-01-18 15:19:03,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:03,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969648937] [2022-01-18 15:19:03,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:03,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:03,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:03,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969648937] [2022-01-18 15:19:03,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969648937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:03,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237293096] [2022-01-18 15:19:03,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:03,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:03,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:03,353 INFO L229 MonitoredProcess]: Starting monitored process 565 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:03,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (565)] Waiting until timeout for monitored process [2022-01-18 15:19:03,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:19:03,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:03,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:03,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:03,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:03,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:03,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:03,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:03,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:03,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:03,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:03,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:03,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:03,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:03,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:19:03,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:03,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:19:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:03,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237293096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:03,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:03,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:19:03,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115032559] [2022-01-18 15:19:03,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:03,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:19:03,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:03,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:19:03,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:03,853 INFO L87 Difference]: Start difference. First operand 780 states and 2596 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:04,182 INFO L93 Difference]: Finished difference Result 1066 states and 3419 transitions. [2022-01-18 15:19:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:19:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:04,184 INFO L225 Difference]: With dead ends: 1066 [2022-01-18 15:19:04,184 INFO L226 Difference]: Without dead ends: 1039 [2022-01-18 15:19:04,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:19:04,184 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:04,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 171 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 477 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-01-18 15:19:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-01-18 15:19:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 780. [2022-01-18 15:19:04,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.329910141206675) internal successors, (2594), 779 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:04,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2594 transitions. [2022-01-18 15:19:04,193 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2594 transitions. Word has length 21 [2022-01-18 15:19:04,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:04,193 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2594 transitions. [2022-01-18 15:19:04,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:04,193 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2594 transitions. [2022-01-18 15:19:04,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:04,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:04,194 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:04,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (565)] Ended with exit code 0 [2022-01-18 15:19:04,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 565 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2022-01-18 15:19:04,395 INFO L402 AbstractCegarLoop]: === Iteration 577 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash 31709833, now seen corresponding path program 565 times [2022-01-18 15:19:04,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:04,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237839515] [2022-01-18 15:19:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:04,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:04,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:04,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237839515] [2022-01-18 15:19:04,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237839515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:04,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230654066] [2022-01-18 15:19:04,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:04,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:04,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:04,524 INFO L229 MonitoredProcess]: Starting monitored process 566 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:04,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (566)] Waiting until timeout for monitored process [2022-01-18 15:19:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:04,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:04,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:04,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:04,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:04,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:04,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:04,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:04,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:04,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:04,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:04,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:05,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:05,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:05,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:05,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:05,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230654066] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:05,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:05,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:05,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633050193] [2022-01-18 15:19:05,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:05,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:05,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:05,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:05,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:05,120 INFO L87 Difference]: Start difference. First operand 780 states and 2594 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:05,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:05,611 INFO L93 Difference]: Finished difference Result 1086 states and 3502 transitions. [2022-01-18 15:19:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:19:05,611 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:05,613 INFO L225 Difference]: With dead ends: 1086 [2022-01-18 15:19:05,614 INFO L226 Difference]: Without dead ends: 1065 [2022-01-18 15:19:05,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:19:05,614 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:05,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 190 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 510 Invalid, 0 Unknown, 182 Unchecked, 0.2s Time] [2022-01-18 15:19:05,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-01-18 15:19:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 782. [2022-01-18 15:19:05,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.330345710627401) internal successors, (2601), 781 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2601 transitions. [2022-01-18 15:19:05,628 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2601 transitions. Word has length 21 [2022-01-18 15:19:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:05,628 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2601 transitions. [2022-01-18 15:19:05,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2601 transitions. [2022-01-18 15:19:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:05,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:05,629 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:05,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (566)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:05,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2022-01-18 15:19:05,843 INFO L402 AbstractCegarLoop]: === Iteration 578 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:05,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:05,843 INFO L85 PathProgramCache]: Analyzing trace with hash -745174423, now seen corresponding path program 566 times [2022-01-18 15:19:05,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:05,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221346810] [2022-01-18 15:19:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:05,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:06,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:06,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221346810] [2022-01-18 15:19:06,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221346810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:06,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276479068] [2022-01-18 15:19:06,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:06,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:06,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:06,009 INFO L229 MonitoredProcess]: Starting monitored process 567 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:06,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (567)] Waiting until timeout for monitored process [2022-01-18 15:19:06,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:06,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:06,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:06,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:06,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:06,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:06,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:06,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:06,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:06,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:06,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:06,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:06,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:06,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:06,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:06,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:06,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:06,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276479068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:06,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:06,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:06,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392055552] [2022-01-18 15:19:06,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:06,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:06,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:06,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:06,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:06,545 INFO L87 Difference]: Start difference. First operand 782 states and 2601 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:07,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:07,008 INFO L93 Difference]: Finished difference Result 1090 states and 3504 transitions. [2022-01-18 15:19:07,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:19:07,009 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:07,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:07,010 INFO L225 Difference]: With dead ends: 1090 [2022-01-18 15:19:07,010 INFO L226 Difference]: Without dead ends: 1075 [2022-01-18 15:19:07,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:19:07,011 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 84 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:07,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 264 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 689 Invalid, 0 Unknown, 179 Unchecked, 0.2s Time] [2022-01-18 15:19:07,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-01-18 15:19:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 778. [2022-01-18 15:19:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 3.332046332046332) internal successors, (2589), 777 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2589 transitions. [2022-01-18 15:19:07,020 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2589 transitions. Word has length 21 [2022-01-18 15:19:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:07,020 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 2589 transitions. [2022-01-18 15:19:07,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2589 transitions. [2022-01-18 15:19:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:07,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:07,021 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:07,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (567)] Ended with exit code 0 [2022-01-18 15:19:07,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,567 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:07,222 INFO L402 AbstractCegarLoop]: === Iteration 579 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:07,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:07,222 INFO L85 PathProgramCache]: Analyzing trace with hash -914680815, now seen corresponding path program 567 times [2022-01-18 15:19:07,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:07,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977045183] [2022-01-18 15:19:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:07,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:07,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:07,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977045183] [2022-01-18 15:19:07,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977045183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:07,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289644759] [2022-01-18 15:19:07,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:07,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:07,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:07,334 INFO L229 MonitoredProcess]: Starting monitored process 568 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:07,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (568)] Waiting until timeout for monitored process [2022-01-18 15:19:07,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:19:07,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:07,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:07,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:07,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:07,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:07,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:07,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:07,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:07,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:19:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:07,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:07,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:07,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:19:07,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:07,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:07,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:07,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:07,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289644759] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:07,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:07,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:19:07,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566795467] [2022-01-18 15:19:07,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:07,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:07,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:07,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:07,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:07,751 INFO L87 Difference]: Start difference. First operand 778 states and 2589 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:07,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:07,851 INFO L93 Difference]: Finished difference Result 839 states and 2766 transitions. [2022-01-18 15:19:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:07,852 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:07,853 INFO L225 Difference]: With dead ends: 839 [2022-01-18 15:19:07,853 INFO L226 Difference]: Without dead ends: 817 [2022-01-18 15:19:07,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:07,853 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:07,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 81 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 271 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-01-18 15:19:07,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-01-18 15:19:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 779. [2022-01-18 15:19:07,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.334190231362468) internal successors, (2594), 778 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2594 transitions. [2022-01-18 15:19:07,861 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2594 transitions. Word has length 21 [2022-01-18 15:19:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:07,861 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 2594 transitions. [2022-01-18 15:19:07,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2594 transitions. [2022-01-18 15:19:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:07,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:07,863 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:07,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (568)] Ended with exit code 0 [2022-01-18 15:19:08,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,568 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:08,063 INFO L402 AbstractCegarLoop]: === Iteration 580 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:08,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:08,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1691565071, now seen corresponding path program 568 times [2022-01-18 15:19:08,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:08,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785643802] [2022-01-18 15:19:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:08,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:08,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:08,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785643802] [2022-01-18 15:19:08,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785643802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:08,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743203380] [2022-01-18 15:19:08,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:08,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:08,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:08,172 INFO L229 MonitoredProcess]: Starting monitored process 569 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:08,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (569)] Waiting until timeout for monitored process [2022-01-18 15:19:08,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:08,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:08,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:08,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:08,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:08,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:08,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:08,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:08,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:08,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:19:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:08,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:08,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:08,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:19:08,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:08,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:08,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:08,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:08,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743203380] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:08,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:08,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:19:08,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389615949] [2022-01-18 15:19:08,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:08,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:08,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:08,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:08,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:08,615 INFO L87 Difference]: Start difference. First operand 779 states and 2594 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:08,732 INFO L93 Difference]: Finished difference Result 905 states and 2956 transitions. [2022-01-18 15:19:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:19:08,732 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:08,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:08,733 INFO L225 Difference]: With dead ends: 905 [2022-01-18 15:19:08,733 INFO L226 Difference]: Without dead ends: 883 [2022-01-18 15:19:08,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:08,733 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:08,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 181 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 314 Invalid, 0 Unknown, 298 Unchecked, 0.1s Time] [2022-01-18 15:19:08,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-01-18 15:19:08,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 784. [2022-01-18 15:19:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.3358876117496807) internal successors, (2612), 783 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2612 transitions. [2022-01-18 15:19:08,742 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2612 transitions. Word has length 21 [2022-01-18 15:19:08,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:08,742 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 2612 transitions. [2022-01-18 15:19:08,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:08,742 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2612 transitions. [2022-01-18 15:19:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:08,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:08,743 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:08,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (569)] Ended with exit code 0 [2022-01-18 15:19:08,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2022-01-18 15:19:08,943 INFO L402 AbstractCegarLoop]: === Iteration 581 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:08,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1725946248, now seen corresponding path program 569 times [2022-01-18 15:19:08,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:08,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77580861] [2022-01-18 15:19:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:08,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:09,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:09,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77580861] [2022-01-18 15:19:09,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77580861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:09,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439285291] [2022-01-18 15:19:09,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:09,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:09,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:09,047 INFO L229 MonitoredProcess]: Starting monitored process 570 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:09,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (570)] Waiting until timeout for monitored process [2022-01-18 15:19:09,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:19:09,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:09,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:09,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:09,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:09,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:09,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:09,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:09,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:09,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:09,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:09,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:09,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:09,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:09,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:19:09,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:09,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:09,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439285291] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:09,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:09,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:19:09,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594345550] [2022-01-18 15:19:09,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:09,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:19:09,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:09,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:19:09,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:09,503 INFO L87 Difference]: Start difference. First operand 784 states and 2612 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:09,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:09,746 INFO L93 Difference]: Finished difference Result 1021 states and 3324 transitions. [2022-01-18 15:19:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:19:09,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:09,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:09,748 INFO L225 Difference]: With dead ends: 1021 [2022-01-18 15:19:09,748 INFO L226 Difference]: Without dead ends: 998 [2022-01-18 15:19:09,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:19:09,748 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:09,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 169 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 474 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-01-18 15:19:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-01-18 15:19:09,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 784. [2022-01-18 15:19:09,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.3358876117496807) internal successors, (2612), 783 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2612 transitions. [2022-01-18 15:19:09,757 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2612 transitions. Word has length 21 [2022-01-18 15:19:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:09,757 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 2612 transitions. [2022-01-18 15:19:09,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2612 transitions. [2022-01-18 15:19:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:09,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:09,758 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:09,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (570)] Ended with exit code 0 [2022-01-18 15:19:09,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,570 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:09,959 INFO L402 AbstractCegarLoop]: === Iteration 582 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:09,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:09,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1965780051, now seen corresponding path program 570 times [2022-01-18 15:19:09,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:09,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146613803] [2022-01-18 15:19:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:09,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:10,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:10,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146613803] [2022-01-18 15:19:10,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146613803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:10,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813288546] [2022-01-18 15:19:10,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:10,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:10,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:10,071 INFO L229 MonitoredProcess]: Starting monitored process 571 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:10,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (571)] Waiting until timeout for monitored process [2022-01-18 15:19:10,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:19:10,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:10,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:10,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:10,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:10,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:10,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:10,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:10,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:10,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:10,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:10,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:10,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:10,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:10,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:10,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:10,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:10,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813288546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:10,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:10,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:19:10,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739947893] [2022-01-18 15:19:10,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:10,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:10,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:10,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:10,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:10,558 INFO L87 Difference]: Start difference. First operand 784 states and 2612 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:10,846 INFO L93 Difference]: Finished difference Result 1005 states and 3268 transitions. [2022-01-18 15:19:10,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:19:10,846 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:10,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:10,847 INFO L225 Difference]: With dead ends: 1005 [2022-01-18 15:19:10,847 INFO L226 Difference]: Without dead ends: 978 [2022-01-18 15:19:10,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:19:10,848 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:10,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 192 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 431 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-01-18 15:19:10,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-01-18 15:19:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 785. [2022-01-18 15:19:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.3392857142857144) internal successors, (2618), 784 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2618 transitions. [2022-01-18 15:19:10,857 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2618 transitions. Word has length 21 [2022-01-18 15:19:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:10,857 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2618 transitions. [2022-01-18 15:19:10,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2618 transitions. [2022-01-18 15:19:10,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:10,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:10,858 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:10,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (571)] Ended with exit code 0 [2022-01-18 15:19:11,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,571 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:11,058 INFO L402 AbstractCegarLoop]: === Iteration 583 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:11,058 INFO L85 PathProgramCache]: Analyzing trace with hash -811170661, now seen corresponding path program 571 times [2022-01-18 15:19:11,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:11,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124200541] [2022-01-18 15:19:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:11,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:11,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:11,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124200541] [2022-01-18 15:19:11,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124200541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:11,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283926966] [2022-01-18 15:19:11,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:11,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:11,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:11,165 INFO L229 MonitoredProcess]: Starting monitored process 572 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:11,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (572)] Waiting until timeout for monitored process [2022-01-18 15:19:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:11,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:11,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:11,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:11,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:11,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:11,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:11,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:11,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:11,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:11,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:11,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:19:11,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:11,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:11,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:11,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:11,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283926966] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:11,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:11,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:19:11,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205725856] [2022-01-18 15:19:11,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:11,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:19:11,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:11,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:19:11,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:11,555 INFO L87 Difference]: Start difference. First operand 785 states and 2618 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:11,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:11,709 INFO L93 Difference]: Finished difference Result 904 states and 2966 transitions. [2022-01-18 15:19:11,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:11,710 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:11,711 INFO L225 Difference]: With dead ends: 904 [2022-01-18 15:19:11,711 INFO L226 Difference]: Without dead ends: 875 [2022-01-18 15:19:11,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:19:11,711 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:11,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 152 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 428 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2022-01-18 15:19:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-01-18 15:19:11,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 785. [2022-01-18 15:19:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.3392857142857144) internal successors, (2618), 784 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2618 transitions. [2022-01-18 15:19:11,719 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2618 transitions. Word has length 21 [2022-01-18 15:19:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:11,719 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2618 transitions. [2022-01-18 15:19:11,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:11,720 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2618 transitions. [2022-01-18 15:19:11,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:11,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:11,720 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:11,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (572)] Ended with exit code 0 [2022-01-18 15:19:11,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,572 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:11,921 INFO L402 AbstractCegarLoop]: === Iteration 584 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:11,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:11,921 INFO L85 PathProgramCache]: Analyzing trace with hash 561503984, now seen corresponding path program 572 times [2022-01-18 15:19:11,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:11,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989000494] [2022-01-18 15:19:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:11,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:12,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:12,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989000494] [2022-01-18 15:19:12,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989000494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:12,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178804108] [2022-01-18 15:19:12,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:12,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:12,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:12,043 INFO L229 MonitoredProcess]: Starting monitored process 573 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:12,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (573)] Waiting until timeout for monitored process [2022-01-18 15:19:12,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:12,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:12,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:12,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:12,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:12,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:12,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:12,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:12,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:12,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:12,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:12,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:12,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:12,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:12,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:19:12,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:12,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:19:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:12,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178804108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:12,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:12,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:19:12,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901703172] [2022-01-18 15:19:12,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:12,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:19:12,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:12,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:19:12,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:12,537 INFO L87 Difference]: Start difference. First operand 785 states and 2618 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:12,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:12,905 INFO L93 Difference]: Finished difference Result 1102 states and 3536 transitions. [2022-01-18 15:19:12,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:19:12,905 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:12,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:12,907 INFO L225 Difference]: With dead ends: 1102 [2022-01-18 15:19:12,907 INFO L226 Difference]: Without dead ends: 1075 [2022-01-18 15:19:12,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:19:12,907 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:12,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 259 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 666 Invalid, 0 Unknown, 205 Unchecked, 0.2s Time] [2022-01-18 15:19:12,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-01-18 15:19:12,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 787. [2022-01-18 15:19:12,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.337150127226463) internal successors, (2623), 786 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:12,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2623 transitions. [2022-01-18 15:19:12,917 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2623 transitions. Word has length 21 [2022-01-18 15:19:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:12,918 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 2623 transitions. [2022-01-18 15:19:12,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2623 transitions. [2022-01-18 15:19:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:12,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:12,919 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:12,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (573)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:13,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,573 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:13,119 INFO L402 AbstractCegarLoop]: === Iteration 585 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:13,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1975612925, now seen corresponding path program 573 times [2022-01-18 15:19:13,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:13,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356988480] [2022-01-18 15:19:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:13,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:13,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:13,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356988480] [2022-01-18 15:19:13,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356988480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:13,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397644496] [2022-01-18 15:19:13,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:13,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:13,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:13,228 INFO L229 MonitoredProcess]: Starting monitored process 574 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:13,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (574)] Waiting until timeout for monitored process [2022-01-18 15:19:13,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:19:13,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:13,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:13,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:13,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:13,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:13,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:13,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:13,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:13,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:19:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:13,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:13,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:13,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:19:13,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:13,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:13,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:13,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:13,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397644496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:13,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:13,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:19:13,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406237075] [2022-01-18 15:19:13,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:13,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:13,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:13,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:13,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:13,682 INFO L87 Difference]: Start difference. First operand 787 states and 2623 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:13,886 INFO L93 Difference]: Finished difference Result 916 states and 2960 transitions. [2022-01-18 15:19:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:19:13,886 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:13,887 INFO L225 Difference]: With dead ends: 916 [2022-01-18 15:19:13,887 INFO L226 Difference]: Without dead ends: 872 [2022-01-18 15:19:13,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:13,888 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:13,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 193 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 509 Invalid, 0 Unknown, 185 Unchecked, 0.2s Time] [2022-01-18 15:19:13,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-01-18 15:19:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 786. [2022-01-18 15:19:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.335031847133758) internal successors, (2618), 785 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2618 transitions. [2022-01-18 15:19:13,896 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2618 transitions. Word has length 21 [2022-01-18 15:19:13,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:13,896 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 2618 transitions. [2022-01-18 15:19:13,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2618 transitions. [2022-01-18 15:19:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:13,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:13,897 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:13,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (574)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:14,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2022-01-18 15:19:14,098 INFO L402 AbstractCegarLoop]: === Iteration 586 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:14,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1157609900, now seen corresponding path program 574 times [2022-01-18 15:19:14,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:14,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261876527] [2022-01-18 15:19:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:14,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:14,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:14,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261876527] [2022-01-18 15:19:14,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261876527] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:14,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302310729] [2022-01-18 15:19:14,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:14,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:14,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:14,232 INFO L229 MonitoredProcess]: Starting monitored process 575 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:14,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (575)] Waiting until timeout for monitored process [2022-01-18 15:19:14,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:14,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:14,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:14,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:14,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:14,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:14,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:14,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:14,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:14,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:14,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:14,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:14,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:14,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:14,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:19:14,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:14,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:19:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:14,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302310729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:14,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:14,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:19:14,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792146943] [2022-01-18 15:19:14,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:14,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:19:14,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:14,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:19:14,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:14,723 INFO L87 Difference]: Start difference. First operand 786 states and 2618 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:15,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:15,109 INFO L93 Difference]: Finished difference Result 1099 states and 3511 transitions. [2022-01-18 15:19:15,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:19:15,109 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:15,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:15,111 INFO L225 Difference]: With dead ends: 1099 [2022-01-18 15:19:15,111 INFO L226 Difference]: Without dead ends: 1076 [2022-01-18 15:19:15,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:19:15,111 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 103 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:15,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 154 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 400 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-01-18 15:19:15,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-01-18 15:19:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 786. [2022-01-18 15:19:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.335031847133758) internal successors, (2618), 785 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2618 transitions. [2022-01-18 15:19:15,120 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2618 transitions. Word has length 21 [2022-01-18 15:19:15,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:15,120 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 2618 transitions. [2022-01-18 15:19:15,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2618 transitions. [2022-01-18 15:19:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:15,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:15,121 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:15,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (575)] Ended with exit code 0 [2022-01-18 15:19:15,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2022-01-18 15:19:15,322 INFO L402 AbstractCegarLoop]: === Iteration 587 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:15,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:15,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1140989895, now seen corresponding path program 575 times [2022-01-18 15:19:15,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:15,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364182606] [2022-01-18 15:19:15,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:15,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:15,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:15,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364182606] [2022-01-18 15:19:15,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364182606] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:15,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985551335] [2022-01-18 15:19:15,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:15,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:15,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:15,454 INFO L229 MonitoredProcess]: Starting monitored process 576 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:15,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (576)] Waiting until timeout for monitored process [2022-01-18 15:19:15,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:19:15,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:15,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:15,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:15,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:15,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:15,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:15,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:15,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:15,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:15,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:19:15,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:15,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:15,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:15,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:15,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985551335] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:15,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:15,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:19:15,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412130995] [2022-01-18 15:19:15,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:15,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:15,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:15,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:15,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:15,897 INFO L87 Difference]: Start difference. First operand 786 states and 2618 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:16,093 INFO L93 Difference]: Finished difference Result 921 states and 2988 transitions. [2022-01-18 15:19:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:19:16,093 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:16,094 INFO L225 Difference]: With dead ends: 921 [2022-01-18 15:19:16,094 INFO L226 Difference]: Without dead ends: 863 [2022-01-18 15:19:16,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:16,094 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:16,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 204 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 541 Invalid, 0 Unknown, 178 Unchecked, 0.2s Time] [2022-01-18 15:19:16,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-01-18 15:19:16,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 783. [2022-01-18 15:19:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.333759590792839) internal successors, (2607), 782 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2607 transitions. [2022-01-18 15:19:16,103 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2607 transitions. Word has length 21 [2022-01-18 15:19:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:16,103 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 2607 transitions. [2022-01-18 15:19:16,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2607 transitions. [2022-01-18 15:19:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:16,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:16,104 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:16,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (576)] Ended with exit code 0 [2022-01-18 15:19:16,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2022-01-18 15:19:16,304 INFO L402 AbstractCegarLoop]: === Iteration 588 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:16,304 INFO L85 PathProgramCache]: Analyzing trace with hash 258931213, now seen corresponding path program 576 times [2022-01-18 15:19:16,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:16,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494273924] [2022-01-18 15:19:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:16,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:16,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:16,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494273924] [2022-01-18 15:19:16,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494273924] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:16,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506431675] [2022-01-18 15:19:16,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:16,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:16,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:16,409 INFO L229 MonitoredProcess]: Starting monitored process 577 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:16,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (577)] Waiting until timeout for monitored process [2022-01-18 15:19:16,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:19:16,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:16,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:16,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:16,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:16,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:16,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:16,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:16,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:16,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:16,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:16,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:16,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:16,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:16,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:16,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:16,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:16,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506431675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:16,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:16,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:19:16,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000628991] [2022-01-18 15:19:16,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:16,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:19:16,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:16,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:19:16,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:16,888 INFO L87 Difference]: Start difference. First operand 783 states and 2607 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:17,230 INFO L93 Difference]: Finished difference Result 999 states and 3263 transitions. [2022-01-18 15:19:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:19:17,230 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:17,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:17,232 INFO L225 Difference]: With dead ends: 999 [2022-01-18 15:19:17,232 INFO L226 Difference]: Without dead ends: 978 [2022-01-18 15:19:17,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:19:17,232 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:17,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 214 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 678 Invalid, 0 Unknown, 115 Unchecked, 0.2s Time] [2022-01-18 15:19:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-01-18 15:19:17,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 786. [2022-01-18 15:19:17,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.3363057324840764) internal successors, (2619), 785 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2619 transitions. [2022-01-18 15:19:17,250 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2619 transitions. Word has length 21 [2022-01-18 15:19:17,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:17,250 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 2619 transitions. [2022-01-18 15:19:17,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:17,250 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2619 transitions. [2022-01-18 15:19:17,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:17,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:17,251 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:17,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (577)] Ended with exit code 0 [2022-01-18 15:19:17,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2022-01-18 15:19:17,451 INFO L402 AbstractCegarLoop]: === Iteration 589 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:17,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:17,452 INFO L85 PathProgramCache]: Analyzing trace with hash -517953043, now seen corresponding path program 577 times [2022-01-18 15:19:17,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:17,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564744051] [2022-01-18 15:19:17,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:17,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:17,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:17,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564744051] [2022-01-18 15:19:17,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564744051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:17,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846501666] [2022-01-18 15:19:17,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:17,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:17,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:17,584 INFO L229 MonitoredProcess]: Starting monitored process 578 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:17,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (578)] Waiting until timeout for monitored process [2022-01-18 15:19:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:17,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:17,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:17,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:17,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:17,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:17,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:17,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:17,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:17,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:17,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:17,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:18,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:18,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:18,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:18,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:18,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846501666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:18,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:18,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:18,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082083799] [2022-01-18 15:19:18,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:18,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:18,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:18,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:18,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:18,087 INFO L87 Difference]: Start difference. First operand 786 states and 2619 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:18,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:18,432 INFO L93 Difference]: Finished difference Result 1049 states and 3388 transitions. [2022-01-18 15:19:18,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:19:18,432 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:18,434 INFO L225 Difference]: With dead ends: 1049 [2022-01-18 15:19:18,434 INFO L226 Difference]: Without dead ends: 1034 [2022-01-18 15:19:18,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:19:18,434 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:18,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 200 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 485 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-01-18 15:19:18,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-01-18 15:19:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 784. [2022-01-18 15:19:18,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.3358876117496807) internal successors, (2612), 783 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2612 transitions. [2022-01-18 15:19:18,443 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2612 transitions. Word has length 21 [2022-01-18 15:19:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:18,443 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 2612 transitions. [2022-01-18 15:19:18,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2612 transitions. [2022-01-18 15:19:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:18,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:18,445 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:18,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (578)] Ended with exit code 0 [2022-01-18 15:19:18,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,578 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:18,645 INFO L402 AbstractCegarLoop]: === Iteration 590 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:18,645 INFO L85 PathProgramCache]: Analyzing trace with hash 855037129, now seen corresponding path program 578 times [2022-01-18 15:19:18,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:18,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797887164] [2022-01-18 15:19:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:18,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:18,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:18,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797887164] [2022-01-18 15:19:18,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797887164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:18,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271556035] [2022-01-18 15:19:18,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:18,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:18,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:18,785 INFO L229 MonitoredProcess]: Starting monitored process 579 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:18,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (579)] Waiting until timeout for monitored process [2022-01-18 15:19:18,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:18,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:18,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:18,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:18,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:18,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:18,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:18,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:18,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:18,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:19,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:19,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:19,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:19,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:19,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:19,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:19,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:19,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271556035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:19,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:19,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:19,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805408608] [2022-01-18 15:19:19,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:19,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:19,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:19,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:19,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:19,253 INFO L87 Difference]: Start difference. First operand 784 states and 2612 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:19,538 INFO L93 Difference]: Finished difference Result 1037 states and 3366 transitions. [2022-01-18 15:19:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:19:19,538 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:19,539 INFO L225 Difference]: With dead ends: 1037 [2022-01-18 15:19:19,539 INFO L226 Difference]: Without dead ends: 1016 [2022-01-18 15:19:19,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:19:19,540 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 87 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:19,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 127 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 383 Invalid, 0 Unknown, 145 Unchecked, 0.1s Time] [2022-01-18 15:19:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-01-18 15:19:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 782. [2022-01-18 15:19:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.3316261203585147) internal successors, (2602), 781 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2602 transitions. [2022-01-18 15:19:19,549 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2602 transitions. Word has length 21 [2022-01-18 15:19:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:19,549 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2602 transitions. [2022-01-18 15:19:19,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2602 transitions. [2022-01-18 15:19:19,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:19,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:19,550 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:19,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (579)] Ended with exit code 0 [2022-01-18 15:19:19,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2022-01-18 15:19:19,750 INFO L402 AbstractCegarLoop]: === Iteration 591 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:19,750 INFO L85 PathProgramCache]: Analyzing trace with hash -659620486, now seen corresponding path program 579 times [2022-01-18 15:19:19,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:19,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455529099] [2022-01-18 15:19:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:19,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:19,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:19,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455529099] [2022-01-18 15:19:19,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455529099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:19,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430870499] [2022-01-18 15:19:19,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:19,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:19,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:19,884 INFO L229 MonitoredProcess]: Starting monitored process 580 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:19,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (580)] Waiting until timeout for monitored process [2022-01-18 15:19:19,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:19:19,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:19,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:19,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:19,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:19,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:20,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:20,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:20,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:20,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:20,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:20,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:20,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:19:20,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:20,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:19:20,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:20,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:19:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:20,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430870499] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:20,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:20,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:20,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933046097] [2022-01-18 15:19:20,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:20,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:20,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:20,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:20,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:20,389 INFO L87 Difference]: Start difference. First operand 782 states and 2602 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:20,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:20,727 INFO L93 Difference]: Finished difference Result 985 states and 3198 transitions. [2022-01-18 15:19:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:19:20,727 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:20,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:20,729 INFO L225 Difference]: With dead ends: 985 [2022-01-18 15:19:20,729 INFO L226 Difference]: Without dead ends: 962 [2022-01-18 15:19:20,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:19:20,729 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:20,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 169 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 545 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-01-18 15:19:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-01-18 15:19:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 782. [2022-01-18 15:19:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.3316261203585147) internal successors, (2602), 781 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2602 transitions. [2022-01-18 15:19:20,738 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2602 transitions. Word has length 21 [2022-01-18 15:19:20,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:20,738 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2602 transitions. [2022-01-18 15:19:20,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:20,738 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2602 transitions. [2022-01-18 15:19:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:20,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:20,739 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:20,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (580)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:20,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590,580 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:20,940 INFO L402 AbstractCegarLoop]: === Iteration 592 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:20,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash -56379489, now seen corresponding path program 580 times [2022-01-18 15:19:20,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:20,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882323093] [2022-01-18 15:19:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:20,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:21,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:21,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882323093] [2022-01-18 15:19:21,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882323093] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:21,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282197136] [2022-01-18 15:19:21,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:21,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:21,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:21,052 INFO L229 MonitoredProcess]: Starting monitored process 581 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:21,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (581)] Waiting until timeout for monitored process [2022-01-18 15:19:21,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:21,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:21,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:21,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:21,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:21,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:21,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:21,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:21,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:21,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:21,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:21,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:21,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:21,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:21,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:21,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:21,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282197136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:21,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:21,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:19:21,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531362512] [2022-01-18 15:19:21,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:21,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:19:21,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:21,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:19:21,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:21,490 INFO L87 Difference]: Start difference. First operand 782 states and 2602 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:21,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:21,880 INFO L93 Difference]: Finished difference Result 1054 states and 3406 transitions. [2022-01-18 15:19:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:19:21,880 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:21,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:21,882 INFO L225 Difference]: With dead ends: 1054 [2022-01-18 15:19:21,882 INFO L226 Difference]: Without dead ends: 1027 [2022-01-18 15:19:21,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:19:21,882 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 88 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:21,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 196 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 645 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-01-18 15:19:21,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-01-18 15:19:21,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 788. [2022-01-18 15:19:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.343074968233799) internal successors, (2631), 787 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2631 transitions. [2022-01-18 15:19:21,892 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2631 transitions. Word has length 21 [2022-01-18 15:19:21,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:21,892 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 2631 transitions. [2022-01-18 15:19:21,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2631 transitions. [2022-01-18 15:19:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:21,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:21,893 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:21,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (581)] Ended with exit code 0 [2022-01-18 15:19:22,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,581 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:22,093 INFO L402 AbstractCegarLoop]: === Iteration 593 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:22,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:22,093 INFO L85 PathProgramCache]: Analyzing trace with hash -425577183, now seen corresponding path program 581 times [2022-01-18 15:19:22,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:22,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874836733] [2022-01-18 15:19:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:22,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:22,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:22,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874836733] [2022-01-18 15:19:22,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874836733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:22,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416589137] [2022-01-18 15:19:22,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:22,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:22,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:22,201 INFO L229 MonitoredProcess]: Starting monitored process 582 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:22,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (582)] Waiting until timeout for monitored process [2022-01-18 15:19:22,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:19:22,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:22,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:22,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:22,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:22,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:22,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:19:22,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:22,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:22,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:22,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:22,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:22,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:22,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:22,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:22,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:22,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416589137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:22,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:22,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:19:22,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833733068] [2022-01-18 15:19:22,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:22,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:22,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:22,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:22,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:22,579 INFO L87 Difference]: Start difference. First operand 788 states and 2631 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:22,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:22,773 INFO L93 Difference]: Finished difference Result 908 states and 2981 transitions. [2022-01-18 15:19:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:19:22,773 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:22,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:22,774 INFO L225 Difference]: With dead ends: 908 [2022-01-18 15:19:22,774 INFO L226 Difference]: Without dead ends: 865 [2022-01-18 15:19:22,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:22,774 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:22,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 142 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 507 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-01-18 15:19:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-01-18 15:19:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 791. [2022-01-18 15:19:22,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.337974683544304) internal successors, (2637), 790 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2637 transitions. [2022-01-18 15:19:22,783 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2637 transitions. Word has length 21 [2022-01-18 15:19:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:22,783 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 2637 transitions. [2022-01-18 15:19:22,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2637 transitions. [2022-01-18 15:19:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:22,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:22,784 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:22,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (582)] Ended with exit code 0 [2022-01-18 15:19:22,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,582 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:22,984 INFO L402 AbstractCegarLoop]: === Iteration 594 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:22,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:22,984 INFO L85 PathProgramCache]: Analyzing trace with hash -556110332, now seen corresponding path program 582 times [2022-01-18 15:19:22,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:22,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128114909] [2022-01-18 15:19:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:22,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:23,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:23,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128114909] [2022-01-18 15:19:23,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128114909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:23,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898550583] [2022-01-18 15:19:23,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:23,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:23,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:23,089 INFO L229 MonitoredProcess]: Starting monitored process 583 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:23,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (583)] Waiting until timeout for monitored process [2022-01-18 15:19:23,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:19:23,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:23,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:23,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:23,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:23,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:23,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:23,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:23,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:23,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:23,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:23,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:19:23,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:23,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:19:23,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:23,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:23,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898550583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:23,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:23,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:19:23,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122776474] [2022-01-18 15:19:23,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:23,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:23,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:23,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:23,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:23,513 INFO L87 Difference]: Start difference. First operand 791 states and 2637 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:23,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:23,722 INFO L93 Difference]: Finished difference Result 926 states and 3040 transitions. [2022-01-18 15:19:23,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:23,722 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:23,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:23,723 INFO L225 Difference]: With dead ends: 926 [2022-01-18 15:19:23,723 INFO L226 Difference]: Without dead ends: 907 [2022-01-18 15:19:23,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:23,724 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:23,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 141 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 486 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-18 15:19:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-18 15:19:23,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 794. [2022-01-18 15:19:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 3.340479192938209) internal successors, (2649), 793 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 2649 transitions. [2022-01-18 15:19:23,732 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 2649 transitions. Word has length 21 [2022-01-18 15:19:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:23,732 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 2649 transitions. [2022-01-18 15:19:23,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 2649 transitions. [2022-01-18 15:19:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:23,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:23,733 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:23,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (583)] Ended with exit code 0 [2022-01-18 15:19:23,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable593 [2022-01-18 15:19:23,934 INFO L402 AbstractCegarLoop]: === Iteration 595 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2079917416, now seen corresponding path program 583 times [2022-01-18 15:19:23,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:23,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069106217] [2022-01-18 15:19:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:23,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:24,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:24,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069106217] [2022-01-18 15:19:24,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069106217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:24,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184752006] [2022-01-18 15:19:24,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:24,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:24,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:24,055 INFO L229 MonitoredProcess]: Starting monitored process 584 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:24,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (584)] Waiting until timeout for monitored process [2022-01-18 15:19:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:24,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:24,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:24,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:24,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:24,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:24,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:24,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:24,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:24,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:24,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:24,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:19:24,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:24,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:19:24,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:24,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:19:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:24,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184752006] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:24,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:24,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:24,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122907629] [2022-01-18 15:19:24,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:24,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:24,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:24,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:24,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:24,582 INFO L87 Difference]: Start difference. First operand 794 states and 2649 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:24,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:24,790 INFO L93 Difference]: Finished difference Result 940 states and 3074 transitions. [2022-01-18 15:19:24,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:24,791 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:24,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:24,792 INFO L225 Difference]: With dead ends: 940 [2022-01-18 15:19:24,792 INFO L226 Difference]: Without dead ends: 925 [2022-01-18 15:19:24,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:19:24,792 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:24,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 141 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 434 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2022-01-18 15:19:24,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-01-18 15:19:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 796. [2022-01-18 15:19:24,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.342138364779874) internal successors, (2657), 795 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:24,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2657 transitions. [2022-01-18 15:19:24,801 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2657 transitions. Word has length 21 [2022-01-18 15:19:24,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:24,801 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 2657 transitions. [2022-01-18 15:19:24,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:24,801 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2657 transitions. [2022-01-18 15:19:24,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:24,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:24,802 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:24,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (584)] Ended with exit code 0 [2022-01-18 15:19:25,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,584 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:25,002 INFO L402 AbstractCegarLoop]: === Iteration 596 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:25,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1897009370, now seen corresponding path program 584 times [2022-01-18 15:19:25,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:25,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249687307] [2022-01-18 15:19:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:25,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:25,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:25,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249687307] [2022-01-18 15:19:25,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249687307] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:25,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611564701] [2022-01-18 15:19:25,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:25,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:25,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:25,124 INFO L229 MonitoredProcess]: Starting monitored process 585 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:25,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (585)] Waiting until timeout for monitored process [2022-01-18 15:19:25,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:25,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:25,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:25,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:25,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:25,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:25,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:25,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:25,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:25,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:25,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:25,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:25,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:19:25,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:25,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:19:25,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:25,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:19:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:25,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611564701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:25,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:25,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:25,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481581619] [2022-01-18 15:19:25,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:25,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:25,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:25,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:25,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:25,681 INFO L87 Difference]: Start difference. First operand 796 states and 2657 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:25,927 INFO L93 Difference]: Finished difference Result 923 states and 3023 transitions. [2022-01-18 15:19:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:25,927 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:25,929 INFO L225 Difference]: With dead ends: 923 [2022-01-18 15:19:25,929 INFO L226 Difference]: Without dead ends: 916 [2022-01-18 15:19:25,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:19:25,929 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:25,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 165 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 576 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-01-18 15:19:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-01-18 15:19:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 797. [2022-01-18 15:19:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.341708542713568) internal successors, (2660), 796 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2660 transitions. [2022-01-18 15:19:25,941 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2660 transitions. Word has length 21 [2022-01-18 15:19:25,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:25,942 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 2660 transitions. [2022-01-18 15:19:25,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2660 transitions. [2022-01-18 15:19:25,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:25,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:25,943 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:25,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (585)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:26,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2022-01-18 15:19:26,159 INFO L402 AbstractCegarLoop]: === Iteration 597 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:26,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:26,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1811042324, now seen corresponding path program 585 times [2022-01-18 15:19:26,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:26,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027654904] [2022-01-18 15:19:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:26,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:26,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:26,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027654904] [2022-01-18 15:19:26,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027654904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:26,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985967536] [2022-01-18 15:19:26,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:26,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:26,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:26,277 INFO L229 MonitoredProcess]: Starting monitored process 586 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:26,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (586)] Waiting until timeout for monitored process [2022-01-18 15:19:26,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:19:26,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:26,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:19:26,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:26,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:26,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:26,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:26,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:26,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:26,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:26,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:26,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:26,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-18 15:19:26,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:26,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 15:19:26,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:26,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-01-18 15:19:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:26,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985967536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:26,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:26,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:26,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447704263] [2022-01-18 15:19:26,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:26,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:26,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:26,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:26,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:26,989 INFO L87 Difference]: Start difference. First operand 797 states and 2660 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:27,471 INFO L93 Difference]: Finished difference Result 1103 states and 3525 transitions. [2022-01-18 15:19:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:19:27,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:27,473 INFO L225 Difference]: With dead ends: 1103 [2022-01-18 15:19:27,473 INFO L226 Difference]: Without dead ends: 1027 [2022-01-18 15:19:27,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:19:27,473 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 107 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:27,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 275 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 722 Invalid, 0 Unknown, 231 Unchecked, 0.3s Time] [2022-01-18 15:19:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-01-18 15:19:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 798. [2022-01-18 15:19:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.3450439146800504) internal successors, (2666), 797 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2666 transitions. [2022-01-18 15:19:27,482 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2666 transitions. Word has length 21 [2022-01-18 15:19:27,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:27,483 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 2666 transitions. [2022-01-18 15:19:27,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2666 transitions. [2022-01-18 15:19:27,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:27,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:27,484 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:27,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (586)] Ended with exit code 0 [2022-01-18 15:19:27,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2022-01-18 15:19:27,684 INFO L402 AbstractCegarLoop]: === Iteration 598 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash -49758837, now seen corresponding path program 586 times [2022-01-18 15:19:27,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:27,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958756153] [2022-01-18 15:19:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:27,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:27,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:27,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958756153] [2022-01-18 15:19:27,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958756153] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:27,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713263094] [2022-01-18 15:19:27,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:27,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:27,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:27,793 INFO L229 MonitoredProcess]: Starting monitored process 587 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:27,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (587)] Waiting until timeout for monitored process [2022-01-18 15:19:27,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:27,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:27,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:27,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:27,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:27,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:27,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:27,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:27,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:28,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:28,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:28,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:28,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:28,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:28,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:28,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:28,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713263094] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:28,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:28,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:19:28,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263335894] [2022-01-18 15:19:28,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:28,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:28,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:28,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:28,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:28,280 INFO L87 Difference]: Start difference. First operand 798 states and 2666 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:28,730 INFO L93 Difference]: Finished difference Result 1114 states and 3549 transitions. [2022-01-18 15:19:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:19:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:28,732 INFO L225 Difference]: With dead ends: 1114 [2022-01-18 15:19:28,732 INFO L226 Difference]: Without dead ends: 1087 [2022-01-18 15:19:28,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:19:28,732 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:28,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 267 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 751 Invalid, 0 Unknown, 129 Unchecked, 0.3s Time] [2022-01-18 15:19:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-01-18 15:19:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 803. [2022-01-18 15:19:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.3478802992518704) internal successors, (2685), 802 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2685 transitions. [2022-01-18 15:19:28,746 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2685 transitions. Word has length 21 [2022-01-18 15:19:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:28,746 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 2685 transitions. [2022-01-18 15:19:28,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2685 transitions. [2022-01-18 15:19:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:28,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:28,748 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:28,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (587)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:28,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2022-01-18 15:19:28,955 INFO L402 AbstractCegarLoop]: === Iteration 599 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:28,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:28,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1071783579, now seen corresponding path program 587 times [2022-01-18 15:19:28,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:28,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686904573] [2022-01-18 15:19:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:28,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:29,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:29,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686904573] [2022-01-18 15:19:29,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686904573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:29,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563434097] [2022-01-18 15:19:29,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:29,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:29,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:29,062 INFO L229 MonitoredProcess]: Starting monitored process 588 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:29,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (588)] Waiting until timeout for monitored process [2022-01-18 15:19:29,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:19:29,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:29,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:29,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:29,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:29,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:29,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:29,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:19:29,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:29,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:29,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:29,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:29,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:29,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:29,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:29,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:29,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:29,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563434097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:29,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:29,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:19:29,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543419963] [2022-01-18 15:19:29,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:29,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:29,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:29,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:29,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:29,517 INFO L87 Difference]: Start difference. First operand 803 states and 2685 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:29,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:29,688 INFO L93 Difference]: Finished difference Result 911 states and 2978 transitions. [2022-01-18 15:19:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:19:29,688 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:29,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:29,689 INFO L225 Difference]: With dead ends: 911 [2022-01-18 15:19:29,689 INFO L226 Difference]: Without dead ends: 868 [2022-01-18 15:19:29,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:29,690 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:29,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 146 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 421 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-01-18 15:19:29,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-01-18 15:19:29,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 800. [2022-01-18 15:19:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.346683354192741) internal successors, (2674), 799 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2674 transitions. [2022-01-18 15:19:29,698 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2674 transitions. Word has length 21 [2022-01-18 15:19:29,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:29,698 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 2674 transitions. [2022-01-18 15:19:29,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:29,698 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2674 transitions. [2022-01-18 15:19:29,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:29,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:29,699 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:29,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (588)] Ended with exit code 0 [2022-01-18 15:19:29,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 588 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2022-01-18 15:19:29,899 INFO L402 AbstractCegarLoop]: === Iteration 600 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:29,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1319080055, now seen corresponding path program 588 times [2022-01-18 15:19:29,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:29,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542119976] [2022-01-18 15:19:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:29,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:30,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:30,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542119976] [2022-01-18 15:19:30,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542119976] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:30,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046735940] [2022-01-18 15:19:30,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:30,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:30,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:30,007 INFO L229 MonitoredProcess]: Starting monitored process 589 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:30,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (589)] Waiting until timeout for monitored process [2022-01-18 15:19:30,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:19:30,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:30,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:30,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:30,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:30,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:30,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:30,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:30,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:30,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:30,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:30,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:30,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:30,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:30,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:30,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:30,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046735940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:30,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:30,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:19:30,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360059552] [2022-01-18 15:19:30,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:30,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:30,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:30,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:30,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:30,499 INFO L87 Difference]: Start difference. First operand 800 states and 2674 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:30,875 INFO L93 Difference]: Finished difference Result 1102 states and 3494 transitions. [2022-01-18 15:19:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:19:30,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:30,877 INFO L225 Difference]: With dead ends: 1102 [2022-01-18 15:19:30,877 INFO L226 Difference]: Without dead ends: 1091 [2022-01-18 15:19:30,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:19:30,877 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:30,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 183 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 516 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-01-18 15:19:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2022-01-18 15:19:30,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 802. [2022-01-18 15:19:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.3458177278402) internal successors, (2680), 801 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2680 transitions. [2022-01-18 15:19:30,887 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2680 transitions. Word has length 21 [2022-01-18 15:19:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:30,887 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 2680 transitions. [2022-01-18 15:19:30,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2680 transitions. [2022-01-18 15:19:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:30,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:30,888 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:30,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (589)] Ended with exit code 0 [2022-01-18 15:19:31,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2022-01-18 15:19:31,088 INFO L402 AbstractCegarLoop]: === Iteration 601 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:31,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:31,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1587721181, now seen corresponding path program 589 times [2022-01-18 15:19:31,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:31,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187262108] [2022-01-18 15:19:31,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:31,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:31,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:31,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187262108] [2022-01-18 15:19:31,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187262108] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:31,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120333153] [2022-01-18 15:19:31,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:31,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:31,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:31,204 INFO L229 MonitoredProcess]: Starting monitored process 590 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:31,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (590)] Waiting until timeout for monitored process [2022-01-18 15:19:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:31,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:31,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:31,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:31,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:31,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:31,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:19:31,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:31,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:31,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:31,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:31,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:31,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:31,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:31,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:31,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:31,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120333153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:31,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:31,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:19:31,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297872082] [2022-01-18 15:19:31,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:31,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:31,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:31,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:31,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:31,685 INFO L87 Difference]: Start difference. First operand 802 states and 2680 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:31,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:31,905 INFO L93 Difference]: Finished difference Result 882 states and 2888 transitions. [2022-01-18 15:19:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:19:31,906 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:31,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:31,907 INFO L225 Difference]: With dead ends: 882 [2022-01-18 15:19:31,907 INFO L226 Difference]: Without dead ends: 863 [2022-01-18 15:19:31,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:31,907 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:31,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 207 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 594 Invalid, 0 Unknown, 178 Unchecked, 0.2s Time] [2022-01-18 15:19:31,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-01-18 15:19:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 801. [2022-01-18 15:19:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.34625) internal successors, (2677), 800 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2677 transitions. [2022-01-18 15:19:31,924 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2677 transitions. Word has length 21 [2022-01-18 15:19:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:31,924 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 2677 transitions. [2022-01-18 15:19:31,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2677 transitions. [2022-01-18 15:19:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:31,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:31,925 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:31,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (590)] Ended with exit code 0 [2022-01-18 15:19:32,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2022-01-18 15:19:32,125 INFO L402 AbstractCegarLoop]: === Iteration 602 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:32,126 INFO L85 PathProgramCache]: Analyzing trace with hash -559188211, now seen corresponding path program 590 times [2022-01-18 15:19:32,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:32,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821015935] [2022-01-18 15:19:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:32,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:32,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:32,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821015935] [2022-01-18 15:19:32,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821015935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:32,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888899448] [2022-01-18 15:19:32,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:32,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:32,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:32,222 INFO L229 MonitoredProcess]: Starting monitored process 591 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:32,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (591)] Waiting until timeout for monitored process [2022-01-18 15:19:32,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:32,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:32,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:32,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:32,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:32,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:32,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:19:32,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:32,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:32,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:32,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:32,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:32,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:32,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:32,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:32,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:32,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888899448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:32,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:32,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:19:32,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062382234] [2022-01-18 15:19:32,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:32,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:32,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:32,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:32,669 INFO L87 Difference]: Start difference. First operand 801 states and 2677 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:32,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:32,894 INFO L93 Difference]: Finished difference Result 1027 states and 3211 transitions. [2022-01-18 15:19:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:19:32,894 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:32,896 INFO L225 Difference]: With dead ends: 1027 [2022-01-18 15:19:32,896 INFO L226 Difference]: Without dead ends: 1007 [2022-01-18 15:19:32,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:32,896 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:32,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 232 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 545 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-01-18 15:19:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-01-18 15:19:32,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 836. [2022-01-18 15:19:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.32814371257485) internal successors, (2779), 835 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2779 transitions. [2022-01-18 15:19:32,905 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2779 transitions. Word has length 21 [2022-01-18 15:19:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:32,906 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 2779 transitions. [2022-01-18 15:19:32,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2779 transitions. [2022-01-18 15:19:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:32,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:32,907 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:32,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (591)] Ended with exit code 0 [2022-01-18 15:19:33,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,591 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:33,107 INFO L402 AbstractCegarLoop]: === Iteration 603 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:33,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1388582763, now seen corresponding path program 591 times [2022-01-18 15:19:33,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:33,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929113546] [2022-01-18 15:19:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:33,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:33,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:33,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929113546] [2022-01-18 15:19:33,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929113546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:33,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326726422] [2022-01-18 15:19:33,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:33,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:33,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:33,229 INFO L229 MonitoredProcess]: Starting monitored process 592 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:33,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (592)] Waiting until timeout for monitored process [2022-01-18 15:19:33,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:19:33,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:33,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:33,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:33,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:33,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:33,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:33,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:33,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:33,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:33,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:33,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:33,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:19:33,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:33,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:33,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:33,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:33,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326726422] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:33,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:33,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:33,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338283470] [2022-01-18 15:19:33,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:33,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:33,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:33,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:33,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:33,988 INFO L87 Difference]: Start difference. First operand 836 states and 2779 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:34,235 INFO L93 Difference]: Finished difference Result 1079 states and 3486 transitions. [2022-01-18 15:19:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:19:34,235 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:34,236 INFO L225 Difference]: With dead ends: 1079 [2022-01-18 15:19:34,236 INFO L226 Difference]: Without dead ends: 1037 [2022-01-18 15:19:34,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:19:34,237 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:34,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 195 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 477 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-01-18 15:19:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-01-18 15:19:34,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 843. [2022-01-18 15:19:34,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.332541567695962) internal successors, (2806), 842 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2806 transitions. [2022-01-18 15:19:34,254 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2806 transitions. Word has length 21 [2022-01-18 15:19:34,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:34,254 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 2806 transitions. [2022-01-18 15:19:34,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:34,255 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2806 transitions. [2022-01-18 15:19:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:34,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:34,256 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:34,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (592)] Ended with exit code 0 [2022-01-18 15:19:34,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602,592 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:34,456 INFO L402 AbstractCegarLoop]: === Iteration 604 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:34,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:34,457 INFO L85 PathProgramCache]: Analyzing trace with hash -801667161, now seen corresponding path program 592 times [2022-01-18 15:19:34,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:34,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632998388] [2022-01-18 15:19:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:34,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:34,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:34,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632998388] [2022-01-18 15:19:34,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632998388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:34,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084618132] [2022-01-18 15:19:34,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:34,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:34,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:34,575 INFO L229 MonitoredProcess]: Starting monitored process 593 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:34,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (593)] Waiting until timeout for monitored process [2022-01-18 15:19:34,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:34,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:34,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:34,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:34,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:34,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:35,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:35,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:35,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:35,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:35,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:35,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:35,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:19:35,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:35,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:35,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:35,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:35,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084618132] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:35,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:35,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:35,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575820705] [2022-01-18 15:19:35,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:35,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:35,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:35,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:35,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:35,360 INFO L87 Difference]: Start difference. First operand 843 states and 2806 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:35,603 INFO L93 Difference]: Finished difference Result 1105 states and 3527 transitions. [2022-01-18 15:19:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:19:35,604 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:35,605 INFO L225 Difference]: With dead ends: 1105 [2022-01-18 15:19:35,605 INFO L226 Difference]: Without dead ends: 1075 [2022-01-18 15:19:35,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:19:35,605 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:35,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 200 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 470 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2022-01-18 15:19:35,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-01-18 15:19:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 851. [2022-01-18 15:19:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.3258823529411763) internal successors, (2827), 850 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2827 transitions. [2022-01-18 15:19:35,615 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2827 transitions. Word has length 21 [2022-01-18 15:19:35,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:35,616 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 2827 transitions. [2022-01-18 15:19:35,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2827 transitions. [2022-01-18 15:19:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:35,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:35,617 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:35,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (593)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:35,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable603 [2022-01-18 15:19:35,817 INFO L402 AbstractCegarLoop]: === Iteration 605 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:35,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:35,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1477049089, now seen corresponding path program 593 times [2022-01-18 15:19:35,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:35,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968089396] [2022-01-18 15:19:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:35,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:35,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:35,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968089396] [2022-01-18 15:19:35,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968089396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:35,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625908530] [2022-01-18 15:19:35,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:35,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:35,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:35,968 INFO L229 MonitoredProcess]: Starting monitored process 594 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:35,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (594)] Waiting until timeout for monitored process [2022-01-18 15:19:36,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:19:36,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:36,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:36,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:36,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:36,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:36,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:36,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:36,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:36,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:36,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:36,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:36,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:19:36,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:36,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:36,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:36,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:36,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625908530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:36,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:36,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:36,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250862980] [2022-01-18 15:19:36,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:36,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:36,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:36,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:36,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:36,857 INFO L87 Difference]: Start difference. First operand 851 states and 2827 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:37,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:37,123 INFO L93 Difference]: Finished difference Result 1087 states and 3474 transitions. [2022-01-18 15:19:37,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:19:37,123 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:37,125 INFO L225 Difference]: With dead ends: 1087 [2022-01-18 15:19:37,125 INFO L226 Difference]: Without dead ends: 1069 [2022-01-18 15:19:37,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:19:37,127 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 70 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:37,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 202 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 529 Invalid, 0 Unknown, 287 Unchecked, 0.2s Time] [2022-01-18 15:19:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-01-18 15:19:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 842. [2022-01-18 15:19:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.331747919143876) internal successors, (2802), 841 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2802 transitions. [2022-01-18 15:19:37,137 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2802 transitions. Word has length 21 [2022-01-18 15:19:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:37,137 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 2802 transitions. [2022-01-18 15:19:37,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2802 transitions. [2022-01-18 15:19:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:37,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:37,138 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:37,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (594)] Ended with exit code 0 [2022-01-18 15:19:37,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,594 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:37,338 INFO L402 AbstractCegarLoop]: === Iteration 606 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:37,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:37,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1721635757, now seen corresponding path program 594 times [2022-01-18 15:19:37,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:37,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137506902] [2022-01-18 15:19:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:37,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:37,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:37,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137506902] [2022-01-18 15:19:37,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137506902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:37,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112317886] [2022-01-18 15:19:37,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:37,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:37,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:37,440 INFO L229 MonitoredProcess]: Starting monitored process 595 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:37,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (595)] Waiting until timeout for monitored process [2022-01-18 15:19:37,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:19:37,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:37,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:37,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:37,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:37,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:37,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:37,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:19:37,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:37,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:37,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:37,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:37,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:37,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:37,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:37,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:37,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:37,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112317886] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:37,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:37,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:19:37,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314956404] [2022-01-18 15:19:37,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:37,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:37,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:37,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:37,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:37,959 INFO L87 Difference]: Start difference. First operand 842 states and 2802 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:38,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:38,122 INFO L93 Difference]: Finished difference Result 1044 states and 3242 transitions. [2022-01-18 15:19:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:19:38,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:38,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:38,124 INFO L225 Difference]: With dead ends: 1044 [2022-01-18 15:19:38,124 INFO L226 Difference]: Without dead ends: 994 [2022-01-18 15:19:38,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:38,124 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 52 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:38,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 209 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 363 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-01-18 15:19:38,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-01-18 15:19:38,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 851. [2022-01-18 15:19:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.3211764705882354) internal successors, (2823), 850 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:38,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2823 transitions. [2022-01-18 15:19:38,133 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2823 transitions. Word has length 21 [2022-01-18 15:19:38,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:38,134 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 2823 transitions. [2022-01-18 15:19:38,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:38,134 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2823 transitions. [2022-01-18 15:19:38,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:38,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:38,135 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:38,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (595)] Ended with exit code 0 [2022-01-18 15:19:38,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,595 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:38,335 INFO L402 AbstractCegarLoop]: === Iteration 607 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:38,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:38,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1720552596, now seen corresponding path program 595 times [2022-01-18 15:19:38,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:38,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446972677] [2022-01-18 15:19:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:38,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:38,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:38,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446972677] [2022-01-18 15:19:38,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446972677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:38,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679986254] [2022-01-18 15:19:38,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:38,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:38,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:38,469 INFO L229 MonitoredProcess]: Starting monitored process 596 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:38,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (596)] Waiting until timeout for monitored process [2022-01-18 15:19:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:38,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:38,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:38,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:38,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:38,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:38,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:38,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:38,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:38,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:38,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:19:38,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:38,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:19:38,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:38,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:38,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679986254] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:38,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:38,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:19:38,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767710786] [2022-01-18 15:19:38,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:38,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:19:38,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:38,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:19:38,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:38,956 INFO L87 Difference]: Start difference. First operand 851 states and 2823 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:39,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:39,299 INFO L93 Difference]: Finished difference Result 1045 states and 3382 transitions. [2022-01-18 15:19:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:19:39,299 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:39,301 INFO L225 Difference]: With dead ends: 1045 [2022-01-18 15:19:39,301 INFO L226 Difference]: Without dead ends: 1022 [2022-01-18 15:19:39,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:19:39,301 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:39,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 235 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 713 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-01-18 15:19:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-01-18 15:19:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 851. [2022-01-18 15:19:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.3188235294117647) internal successors, (2821), 850 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2821 transitions. [2022-01-18 15:19:39,311 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2821 transitions. Word has length 21 [2022-01-18 15:19:39,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:39,311 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 2821 transitions. [2022-01-18 15:19:39,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2821 transitions. [2022-01-18 15:19:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:39,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:39,312 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:39,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (596)] Ended with exit code 0 [2022-01-18 15:19:39,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,596 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:39,512 INFO L402 AbstractCegarLoop]: === Iteration 608 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:39,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:39,512 INFO L85 PathProgramCache]: Analyzing trace with hash -604624155, now seen corresponding path program 596 times [2022-01-18 15:19:39,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:39,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538399297] [2022-01-18 15:19:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:39,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:39,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:39,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538399297] [2022-01-18 15:19:39,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538399297] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:39,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032752380] [2022-01-18 15:19:39,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:39,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:39,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:39,618 INFO L229 MonitoredProcess]: Starting monitored process 597 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:39,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (597)] Waiting until timeout for monitored process [2022-01-18 15:19:39,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:39,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:39,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:39,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:39,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:39,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:39,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:39,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:19:39,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:39,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:39,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:39,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:39,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:40,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:40,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:40,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:40,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:40,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032752380] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:40,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:40,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:19:40,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370728608] [2022-01-18 15:19:40,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:40,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:40,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:40,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:40,073 INFO L87 Difference]: Start difference. First operand 851 states and 2821 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:40,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:40,263 INFO L93 Difference]: Finished difference Result 937 states and 3036 transitions. [2022-01-18 15:19:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:19:40,263 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:40,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:40,264 INFO L225 Difference]: With dead ends: 937 [2022-01-18 15:19:40,264 INFO L226 Difference]: Without dead ends: 903 [2022-01-18 15:19:40,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:40,264 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:40,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 175 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 512 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-01-18 15:19:40,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-01-18 15:19:40,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 843. [2022-01-18 15:19:40,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.3099762470308787) internal successors, (2787), 842 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2787 transitions. [2022-01-18 15:19:40,273 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2787 transitions. Word has length 21 [2022-01-18 15:19:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:40,273 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 2787 transitions. [2022-01-18 15:19:40,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:40,273 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2787 transitions. [2022-01-18 15:19:40,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:40,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:40,274 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:40,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (597)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:40,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,597 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:40,475 INFO L402 AbstractCegarLoop]: === Iteration 609 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:40,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:40,475 INFO L85 PathProgramCache]: Analyzing trace with hash -885929566, now seen corresponding path program 597 times [2022-01-18 15:19:40,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:40,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949822083] [2022-01-18 15:19:40,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:40,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:40,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:40,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949822083] [2022-01-18 15:19:40,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949822083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:40,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990726697] [2022-01-18 15:19:40,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:40,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:40,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:40,590 INFO L229 MonitoredProcess]: Starting monitored process 598 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:40,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (598)] Waiting until timeout for monitored process [2022-01-18 15:19:40,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:19:40,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:40,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:40,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:40,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:40,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:40,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:40,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:40,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:40,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:40,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:41,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:41,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:19:41,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:41,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:19:41,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:41,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:19:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:41,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990726697] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:41,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:41,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:41,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35066742] [2022-01-18 15:19:41,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:41,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:41,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:41,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:41,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:41,199 INFO L87 Difference]: Start difference. First operand 843 states and 2787 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:41,448 INFO L93 Difference]: Finished difference Result 1035 states and 3324 transitions. [2022-01-18 15:19:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:19:41,448 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:41,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:41,450 INFO L225 Difference]: With dead ends: 1035 [2022-01-18 15:19:41,450 INFO L226 Difference]: Without dead ends: 1016 [2022-01-18 15:19:41,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:19:41,450 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:41,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 211 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 533 Invalid, 0 Unknown, 177 Unchecked, 0.2s Time] [2022-01-18 15:19:41,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-01-18 15:19:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 843. [2022-01-18 15:19:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 3.3099762470308787) internal successors, (2787), 842 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 2787 transitions. [2022-01-18 15:19:41,461 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 2787 transitions. Word has length 21 [2022-01-18 15:19:41,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:41,461 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 2787 transitions. [2022-01-18 15:19:41,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:41,461 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 2787 transitions. [2022-01-18 15:19:41,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:41,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:41,462 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:41,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (598)] Ended with exit code 0 [2022-01-18 15:19:41,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,598 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:41,662 INFO L402 AbstractCegarLoop]: === Iteration 610 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:41,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1766368626, now seen corresponding path program 598 times [2022-01-18 15:19:41,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:41,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12632515] [2022-01-18 15:19:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:41,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:41,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:41,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12632515] [2022-01-18 15:19:41,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12632515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:41,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640796934] [2022-01-18 15:19:41,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:41,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:41,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:41,773 INFO L229 MonitoredProcess]: Starting monitored process 599 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:41,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (599)] Waiting until timeout for monitored process [2022-01-18 15:19:41,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:41,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:41,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:41,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:41,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:41,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:41,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:41,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:41,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:42,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:42,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:42,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:19:42,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:42,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:19:42,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:42,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:19:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:42,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640796934] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:42,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:42,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:42,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530356011] [2022-01-18 15:19:42,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:42,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:42,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:42,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:42,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:42,266 INFO L87 Difference]: Start difference. First operand 843 states and 2787 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:42,530 INFO L93 Difference]: Finished difference Result 1053 states and 3347 transitions. [2022-01-18 15:19:42,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:19:42,531 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:42,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:42,532 INFO L225 Difference]: With dead ends: 1053 [2022-01-18 15:19:42,532 INFO L226 Difference]: Without dead ends: 1038 [2022-01-18 15:19:42,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:19:42,532 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:42,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 204 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 579 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-01-18 15:19:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-01-18 15:19:42,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 841. [2022-01-18 15:19:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3095238095238093) internal successors, (2780), 840 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2780 transitions. [2022-01-18 15:19:42,544 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2780 transitions. Word has length 21 [2022-01-18 15:19:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:42,544 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2780 transitions. [2022-01-18 15:19:42,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2780 transitions. [2022-01-18 15:19:42,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:42,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:42,545 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:42,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (599)] Ended with exit code 0 [2022-01-18 15:19:42,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,599 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:42,745 INFO L402 AbstractCegarLoop]: === Iteration 611 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:42,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1166972405, now seen corresponding path program 599 times [2022-01-18 15:19:42,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:42,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68771877] [2022-01-18 15:19:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:42,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:42,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:42,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68771877] [2022-01-18 15:19:42,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68771877] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:42,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8845607] [2022-01-18 15:19:42,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:42,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:42,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:42,843 INFO L229 MonitoredProcess]: Starting monitored process 600 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:42,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (600)] Waiting until timeout for monitored process [2022-01-18 15:19:42,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:42,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:42,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:42,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:42,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:43,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:43,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:19:43,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:43,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:43,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:43,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:43,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:43,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:43,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:43,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:43,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:43,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8845607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:43,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:43,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:19:43,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773696763] [2022-01-18 15:19:43,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:43,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:43,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:43,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:43,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:43,256 INFO L87 Difference]: Start difference. First operand 841 states and 2780 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:43,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:43,480 INFO L93 Difference]: Finished difference Result 955 states and 3053 transitions. [2022-01-18 15:19:43,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:19:43,480 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:43,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:43,481 INFO L225 Difference]: With dead ends: 955 [2022-01-18 15:19:43,481 INFO L226 Difference]: Without dead ends: 875 [2022-01-18 15:19:43,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:43,482 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:43,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 243 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 623 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2022-01-18 15:19:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-01-18 15:19:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 807. [2022-01-18 15:19:43,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.333746898263027) internal successors, (2687), 806 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:43,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2687 transitions. [2022-01-18 15:19:43,490 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2687 transitions. Word has length 21 [2022-01-18 15:19:43,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:43,491 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 2687 transitions. [2022-01-18 15:19:43,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:43,491 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2687 transitions. [2022-01-18 15:19:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:43,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:43,492 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:43,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (600)] Ended with exit code 0 [2022-01-18 15:19:43,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2022-01-18 15:19:43,692 INFO L402 AbstractCegarLoop]: === Iteration 612 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:43,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash 748034845, now seen corresponding path program 600 times [2022-01-18 15:19:43,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:43,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645134376] [2022-01-18 15:19:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:43,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:43,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:43,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645134376] [2022-01-18 15:19:43,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645134376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:43,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826836574] [2022-01-18 15:19:43,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:43,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:43,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:43,819 INFO L229 MonitoredProcess]: Starting monitored process 601 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:43,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (601)] Waiting until timeout for monitored process [2022-01-18 15:19:43,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:19:43,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:43,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:43,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:43,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:44,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:44,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:44,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:44,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:44,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:44,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:44,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:19:44,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:44,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:44,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:44,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:44,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826836574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:44,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:44,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:44,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203343565] [2022-01-18 15:19:44,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:44,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:44,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:44,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:44,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:44,279 INFO L87 Difference]: Start difference. First operand 807 states and 2687 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:44,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:44,586 INFO L93 Difference]: Finished difference Result 1059 states and 3424 transitions. [2022-01-18 15:19:44,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:19:44,586 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:44,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:44,588 INFO L225 Difference]: With dead ends: 1059 [2022-01-18 15:19:44,588 INFO L226 Difference]: Without dead ends: 1017 [2022-01-18 15:19:44,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:19:44,588 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:44,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 216 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 667 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-01-18 15:19:44,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-01-18 15:19:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 810. [2022-01-18 15:19:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.3374536464771323) internal successors, (2700), 809 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2700 transitions. [2022-01-18 15:19:44,597 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2700 transitions. Word has length 21 [2022-01-18 15:19:44,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:44,597 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 2700 transitions. [2022-01-18 15:19:44,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2700 transitions. [2022-01-18 15:19:44,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:44,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:44,598 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:44,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (601)] Ended with exit code 0 [2022-01-18 15:19:44,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2022-01-18 15:19:44,799 INFO L402 AbstractCegarLoop]: === Iteration 613 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:44,799 INFO L85 PathProgramCache]: Analyzing trace with hash 429994335, now seen corresponding path program 601 times [2022-01-18 15:19:44,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:44,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959868289] [2022-01-18 15:19:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:44,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:44,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:44,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959868289] [2022-01-18 15:19:44,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959868289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:44,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191830769] [2022-01-18 15:19:44,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:44,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:44,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:44,915 INFO L229 MonitoredProcess]: Starting monitored process 602 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:44,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (602)] Waiting until timeout for monitored process [2022-01-18 15:19:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:44,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:44,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:45,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:45,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:45,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:45,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:45,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:45,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:45,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:45,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:19:45,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:45,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:45,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:45,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:45,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191830769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:45,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:45,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:45,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021995950] [2022-01-18 15:19:45,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:45,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:45,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:45,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:45,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:45,393 INFO L87 Difference]: Start difference. First operand 810 states and 2700 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:45,683 INFO L93 Difference]: Finished difference Result 1027 states and 3315 transitions. [2022-01-18 15:19:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:19:45,683 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:45,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:45,685 INFO L225 Difference]: With dead ends: 1027 [2022-01-18 15:19:45,685 INFO L226 Difference]: Without dead ends: 1009 [2022-01-18 15:19:45,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:19:45,685 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:45,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 221 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 593 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-01-18 15:19:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-01-18 15:19:45,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 811. [2022-01-18 15:19:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 3.337037037037037) internal successors, (2703), 810 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2703 transitions. [2022-01-18 15:19:45,696 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2703 transitions. Word has length 21 [2022-01-18 15:19:45,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:45,696 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 2703 transitions. [2022-01-18 15:19:45,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:45,696 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2703 transitions. [2022-01-18 15:19:45,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:45,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:45,697 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:45,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (602)] Ended with exit code 0 [2022-01-18 15:19:45,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612,602 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:45,898 INFO L402 AbstractCegarLoop]: === Iteration 614 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:45,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:45,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1016909937, now seen corresponding path program 602 times [2022-01-18 15:19:45,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:45,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309573514] [2022-01-18 15:19:45,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:45,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:46,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:46,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309573514] [2022-01-18 15:19:46,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309573514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:46,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961938048] [2022-01-18 15:19:46,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:46,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:46,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:46,026 INFO L229 MonitoredProcess]: Starting monitored process 603 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:46,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (603)] Waiting until timeout for monitored process [2022-01-18 15:19:46,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:46,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:46,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:46,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:46,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:46,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:46,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:46,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:46,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:46,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:46,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:46,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:46,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:19:46,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:46,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:46,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:46,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:46,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961938048] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:46,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:46,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:46,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574126827] [2022-01-18 15:19:46,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:46,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:46,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:46,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:46,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:46,691 INFO L87 Difference]: Start difference. First operand 811 states and 2703 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:46,975 INFO L93 Difference]: Finished difference Result 1032 states and 3323 transitions. [2022-01-18 15:19:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:19:46,975 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:46,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:46,977 INFO L225 Difference]: With dead ends: 1032 [2022-01-18 15:19:46,977 INFO L226 Difference]: Without dead ends: 1017 [2022-01-18 15:19:46,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:19:46,977 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 70 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:46,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 189 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 579 Invalid, 0 Unknown, 169 Unchecked, 0.2s Time] [2022-01-18 15:19:46,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-01-18 15:19:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 805. [2022-01-18 15:19:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.3333333333333335) internal successors, (2680), 804 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:46,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2680 transitions. [2022-01-18 15:19:46,986 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2680 transitions. Word has length 21 [2022-01-18 15:19:46,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:46,986 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 2680 transitions. [2022-01-18 15:19:46,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:46,987 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2680 transitions. [2022-01-18 15:19:46,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:46,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:46,988 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:47,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (603)] Ended with exit code 0 [2022-01-18 15:19:47,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2022-01-18 15:19:47,188 INFO L402 AbstractCegarLoop]: === Iteration 615 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1622282074, now seen corresponding path program 603 times [2022-01-18 15:19:47,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:47,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789766186] [2022-01-18 15:19:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:47,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:47,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:47,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789766186] [2022-01-18 15:19:47,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789766186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:47,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626326748] [2022-01-18 15:19:47,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:47,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:47,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:47,282 INFO L229 MonitoredProcess]: Starting monitored process 604 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:47,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (604)] Waiting until timeout for monitored process [2022-01-18 15:19:47,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:19:47,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:47,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:47,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:47,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:47,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:47,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:47,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:47,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:47,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:47,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:47,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:47,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:47,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:19:47,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:47,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:47,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626326748] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:47,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:47,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:19:47,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546050067] [2022-01-18 15:19:47,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:47,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:19:47,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:47,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:19:47,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:47,774 INFO L87 Difference]: Start difference. First operand 805 states and 2680 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:48,100 INFO L93 Difference]: Finished difference Result 1033 states and 3342 transitions. [2022-01-18 15:19:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:19:48,101 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:48,102 INFO L225 Difference]: With dead ends: 1033 [2022-01-18 15:19:48,102 INFO L226 Difference]: Without dead ends: 1006 [2022-01-18 15:19:48,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:19:48,102 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:48,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 242 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 700 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-01-18 15:19:48,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-01-18 15:19:48,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 807. [2022-01-18 15:19:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.3312655086848637) internal successors, (2685), 806 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:48,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2685 transitions. [2022-01-18 15:19:48,112 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2685 transitions. Word has length 21 [2022-01-18 15:19:48,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:48,112 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 2685 transitions. [2022-01-18 15:19:48,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:48,112 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2685 transitions. [2022-01-18 15:19:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:48,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:48,113 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:48,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (604)] Ended with exit code 0 [2022-01-18 15:19:48,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,604 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:48,314 INFO L402 AbstractCegarLoop]: === Iteration 616 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:48,314 INFO L85 PathProgramCache]: Analyzing trace with hash -914834835, now seen corresponding path program 604 times [2022-01-18 15:19:48,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:48,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007499617] [2022-01-18 15:19:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:48,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:48,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:48,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007499617] [2022-01-18 15:19:48,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007499617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:48,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546852461] [2022-01-18 15:19:48,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:48,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:48,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:48,414 INFO L229 MonitoredProcess]: Starting monitored process 605 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:48,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (605)] Waiting until timeout for monitored process [2022-01-18 15:19:48,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:48,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:48,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:48,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:48,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:48,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:48,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:48,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:48,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:48,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 5 [2022-01-18 15:19:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:48,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:48,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:48,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:19:48,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:48,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:48,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:48,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:48,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546852461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:48,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:48,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:19:48,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509642500] [2022-01-18 15:19:48,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:48,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:48,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:48,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:48,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:48,863 INFO L87 Difference]: Start difference. First operand 807 states and 2685 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:48,992 INFO L93 Difference]: Finished difference Result 884 states and 2900 transitions. [2022-01-18 15:19:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:19:48,993 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:48,994 INFO L225 Difference]: With dead ends: 884 [2022-01-18 15:19:48,994 INFO L226 Difference]: Without dead ends: 862 [2022-01-18 15:19:48,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:48,994 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:48,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 179 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 338 Invalid, 0 Unknown, 216 Unchecked, 0.1s Time] [2022-01-18 15:19:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-01-18 15:19:49,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 807. [2022-01-18 15:19:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.3312655086848637) internal successors, (2685), 806 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2685 transitions. [2022-01-18 15:19:49,003 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2685 transitions. Word has length 21 [2022-01-18 15:19:49,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:49,003 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 2685 transitions. [2022-01-18 15:19:49,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:49,003 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2685 transitions. [2022-01-18 15:19:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:49,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:49,004 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:49,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (605)] Ended with exit code 0 [2022-01-18 15:19:49,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2022-01-18 15:19:49,204 INFO L402 AbstractCegarLoop]: === Iteration 617 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:49,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:49,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2076579306, now seen corresponding path program 605 times [2022-01-18 15:19:49,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:49,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491572873] [2022-01-18 15:19:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:49,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:49,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:49,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491572873] [2022-01-18 15:19:49,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491572873] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:49,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417334463] [2022-01-18 15:19:49,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:49,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:49,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:49,326 INFO L229 MonitoredProcess]: Starting monitored process 606 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:49,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (606)] Waiting until timeout for monitored process [2022-01-18 15:19:49,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:49,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:49,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:49,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:49,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:49,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:49,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:49,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:49,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:49,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:49,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:49,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:49,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:49,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:49,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-18 15:19:49,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:49,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:19:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:49,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417334463] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:49,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:49,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:19:49,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627221460] [2022-01-18 15:19:49,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:49,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:19:49,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:49,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:19:49,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:49,795 INFO L87 Difference]: Start difference. First operand 807 states and 2685 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:50,241 INFO L93 Difference]: Finished difference Result 1109 states and 3550 transitions. [2022-01-18 15:19:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:19:50,241 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:50,243 INFO L225 Difference]: With dead ends: 1109 [2022-01-18 15:19:50,243 INFO L226 Difference]: Without dead ends: 1086 [2022-01-18 15:19:50,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:19:50,243 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 86 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:50,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 245 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 619 Invalid, 0 Unknown, 203 Unchecked, 0.2s Time] [2022-01-18 15:19:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-01-18 15:19:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 807. [2022-01-18 15:19:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.3312655086848637) internal successors, (2685), 806 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2685 transitions. [2022-01-18 15:19:50,253 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2685 transitions. Word has length 21 [2022-01-18 15:19:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:50,253 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 2685 transitions. [2022-01-18 15:19:50,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2685 transitions. [2022-01-18 15:19:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:50,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:50,254 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:50,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (606)] Ended with exit code 0 [2022-01-18 15:19:50,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,606 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:50,455 INFO L402 AbstractCegarLoop]: === Iteration 618 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:50,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:50,455 INFO L85 PathProgramCache]: Analyzing trace with hash -80211805, now seen corresponding path program 606 times [2022-01-18 15:19:50,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:50,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828396282] [2022-01-18 15:19:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:50,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:50,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:50,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828396282] [2022-01-18 15:19:50,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828396282] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:50,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85143587] [2022-01-18 15:19:50,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:50,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:50,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:50,568 INFO L229 MonitoredProcess]: Starting monitored process 607 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:50,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (607)] Waiting until timeout for monitored process [2022-01-18 15:19:50,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:19:50,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:50,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:50,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:50,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:50,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:50,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:50,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:50,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:50,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:50,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:50,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:50,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:19:50,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:50,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:50,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:50,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:50,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85143587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:50,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:50,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:19:50,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298345989] [2022-01-18 15:19:50,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:50,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:50,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:50,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:50,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:50,984 INFO L87 Difference]: Start difference. First operand 807 states and 2685 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:51,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:51,183 INFO L93 Difference]: Finished difference Result 889 states and 2907 transitions. [2022-01-18 15:19:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:19:51,183 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:51,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:51,185 INFO L225 Difference]: With dead ends: 889 [2022-01-18 15:19:51,185 INFO L226 Difference]: Without dead ends: 860 [2022-01-18 15:19:51,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:51,185 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:51,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 230 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 564 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-01-18 15:19:51,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-01-18 15:19:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 805. [2022-01-18 15:19:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.3333333333333335) internal successors, (2680), 804 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2680 transitions. [2022-01-18 15:19:51,193 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2680 transitions. Word has length 21 [2022-01-18 15:19:51,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:51,194 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 2680 transitions. [2022-01-18 15:19:51,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2680 transitions. [2022-01-18 15:19:51,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:51,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:51,195 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:51,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (607)] Forceful destruction successful, exit code 0 [2022-01-18 15:19:51,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,607 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:51,412 INFO L402 AbstractCegarLoop]: === Iteration 619 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:51,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:51,413 INFO L85 PathProgramCache]: Analyzing trace with hash 14352749, now seen corresponding path program 607 times [2022-01-18 15:19:51,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:51,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67318191] [2022-01-18 15:19:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:51,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:51,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:51,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67318191] [2022-01-18 15:19:51,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67318191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:51,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292606471] [2022-01-18 15:19:51,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:51,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:51,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:51,512 INFO L229 MonitoredProcess]: Starting monitored process 608 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:51,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (608)] Waiting until timeout for monitored process [2022-01-18 15:19:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:51,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:51,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:51,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:51,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:51,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:51,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:19:51,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:51,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-18 15:19:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:51,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:51,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:51,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:51,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:51,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:51,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:51,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:19:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:51,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292606471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:51,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:51,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-18 15:19:51,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386563640] [2022-01-18 15:19:51,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:51,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:51,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:51,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:51,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:51,989 INFO L87 Difference]: Start difference. First operand 805 states and 2680 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:52,144 INFO L93 Difference]: Finished difference Result 879 states and 2876 transitions. [2022-01-18 15:19:52,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:19:52,144 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:52,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:52,145 INFO L225 Difference]: With dead ends: 879 [2022-01-18 15:19:52,145 INFO L226 Difference]: Without dead ends: 861 [2022-01-18 15:19:52,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:52,146 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:52,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 176 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 420 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-01-18 15:19:52,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-18 15:19:52,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 790. [2022-01-18 15:19:52,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 3.3574144486692017) internal successors, (2649), 789 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2649 transitions. [2022-01-18 15:19:52,154 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2649 transitions. Word has length 21 [2022-01-18 15:19:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:52,154 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 2649 transitions. [2022-01-18 15:19:52,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:52,154 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2649 transitions. [2022-01-18 15:19:52,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:52,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:52,155 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:52,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (608)] Ended with exit code 0 [2022-01-18 15:19:52,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,608 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:52,356 INFO L402 AbstractCegarLoop]: === Iteration 620 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:52,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:52,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1107553685, now seen corresponding path program 608 times [2022-01-18 15:19:52,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:52,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92806140] [2022-01-18 15:19:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:52,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:52,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:52,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92806140] [2022-01-18 15:19:52,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92806140] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:52,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023855152] [2022-01-18 15:19:52,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:52,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:52,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:52,459 INFO L229 MonitoredProcess]: Starting monitored process 609 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:52,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (609)] Waiting until timeout for monitored process [2022-01-18 15:19:52,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:52,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:52,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:52,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:52,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:52,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:52,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:52,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:52,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:52,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:52,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:52,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:52,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:52,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:52,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:52,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:52,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:52,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023855152] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:52,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:52,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:19:52,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698616659] [2022-01-18 15:19:52,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:52,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:19:52,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:52,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:19:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:19:52,910 INFO L87 Difference]: Start difference. First operand 790 states and 2649 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:53,158 INFO L93 Difference]: Finished difference Result 1055 states and 3464 transitions. [2022-01-18 15:19:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:19:53,159 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:53,160 INFO L225 Difference]: With dead ends: 1055 [2022-01-18 15:19:53,160 INFO L226 Difference]: Without dead ends: 1034 [2022-01-18 15:19:53,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:19:53,161 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 66 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:53,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 152 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 420 Invalid, 0 Unknown, 139 Unchecked, 0.2s Time] [2022-01-18 15:19:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-01-18 15:19:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 793. [2022-01-18 15:19:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.3573232323232323) internal successors, (2659), 792 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2659 transitions. [2022-01-18 15:19:53,170 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2659 transitions. Word has length 21 [2022-01-18 15:19:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:53,170 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 2659 transitions. [2022-01-18 15:19:53,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2659 transitions. [2022-01-18 15:19:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:53,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:53,171 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:53,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (609)] Ended with exit code 0 [2022-01-18 15:19:53,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,609 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:53,371 INFO L402 AbstractCegarLoop]: === Iteration 621 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:53,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:53,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1703659601, now seen corresponding path program 609 times [2022-01-18 15:19:53,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:53,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398604096] [2022-01-18 15:19:53,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:53,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:53,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:53,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398604096] [2022-01-18 15:19:53,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398604096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:53,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70335302] [2022-01-18 15:19:53,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:19:53,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:53,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:53,508 INFO L229 MonitoredProcess]: Starting monitored process 610 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:53,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (610)] Waiting until timeout for monitored process [2022-01-18 15:19:53,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:19:53,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:53,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:53,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:53,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:53,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:53,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:53,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:53,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:53,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:53,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:53,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:53,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:53,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:53,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:53,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:53,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:53,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70335302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:53,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:53,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:53,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647845940] [2022-01-18 15:19:53,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:53,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:53,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:53,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:53,955 INFO L87 Difference]: Start difference. First operand 793 states and 2659 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:54,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:54,303 INFO L93 Difference]: Finished difference Result 1046 states and 3413 transitions. [2022-01-18 15:19:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:19:54,303 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:54,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:54,305 INFO L225 Difference]: With dead ends: 1046 [2022-01-18 15:19:54,305 INFO L226 Difference]: Without dead ends: 1025 [2022-01-18 15:19:54,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:19:54,305 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:54,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 163 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 483 Invalid, 0 Unknown, 178 Unchecked, 0.2s Time] [2022-01-18 15:19:54,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-01-18 15:19:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 792. [2022-01-18 15:19:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.355246523388116) internal successors, (2654), 791 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2654 transitions. [2022-01-18 15:19:54,314 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2654 transitions. Word has length 21 [2022-01-18 15:19:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:54,314 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 2654 transitions. [2022-01-18 15:19:54,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2654 transitions. [2022-01-18 15:19:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:54,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:54,315 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:54,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (610)] Ended with exit code 0 [2022-01-18 15:19:54,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 610 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2022-01-18 15:19:54,516 INFO L402 AbstractCegarLoop]: === Iteration 622 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:54,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:54,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1211063839, now seen corresponding path program 610 times [2022-01-18 15:19:54,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:54,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415088032] [2022-01-18 15:19:54,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:54,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:54,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:54,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415088032] [2022-01-18 15:19:54,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415088032] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:54,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183600444] [2022-01-18 15:19:54,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:19:54,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:54,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:54,635 INFO L229 MonitoredProcess]: Starting monitored process 611 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:54,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (611)] Waiting until timeout for monitored process [2022-01-18 15:19:54,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:19:54,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:54,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:54,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:54,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:54,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:54,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:54,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:54,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:54,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:54,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:19:54,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:54,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:54,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:54,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:55,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183600444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:55,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:55,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:55,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685485263] [2022-01-18 15:19:55,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:55,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:55,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:55,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:55,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:55,044 INFO L87 Difference]: Start difference. First operand 792 states and 2654 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:55,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:55,325 INFO L93 Difference]: Finished difference Result 958 states and 3141 transitions. [2022-01-18 15:19:55,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:19:55,325 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:55,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:55,326 INFO L225 Difference]: With dead ends: 958 [2022-01-18 15:19:55,326 INFO L226 Difference]: Without dead ends: 937 [2022-01-18 15:19:55,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:19:55,327 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 72 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:55,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 124 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 450 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-18 15:19:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-01-18 15:19:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 793. [2022-01-18 15:19:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.352272727272727) internal successors, (2655), 792 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2655 transitions. [2022-01-18 15:19:55,335 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2655 transitions. Word has length 21 [2022-01-18 15:19:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:55,335 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 2655 transitions. [2022-01-18 15:19:55,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:55,336 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2655 transitions. [2022-01-18 15:19:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:55,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:55,337 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:55,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (611)] Ended with exit code 0 [2022-01-18 15:19:55,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621,611 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:55,537 INFO L402 AbstractCegarLoop]: === Iteration 623 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:55,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:55,537 INFO L85 PathProgramCache]: Analyzing trace with hash -312743245, now seen corresponding path program 611 times [2022-01-18 15:19:55,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:55,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483870338] [2022-01-18 15:19:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:55,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:55,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:55,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483870338] [2022-01-18 15:19:55,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483870338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:55,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347332415] [2022-01-18 15:19:55,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:19:55,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:55,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:55,651 INFO L229 MonitoredProcess]: Starting monitored process 612 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:55,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (612)] Waiting until timeout for monitored process [2022-01-18 15:19:55,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:19:55,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:55,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:55,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:55,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:55,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:55,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:55,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:55,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:55,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:55,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:55,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:19:56,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:56,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-18 15:19:56,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:56,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:56,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347332415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:56,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:56,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:56,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132682012] [2022-01-18 15:19:56,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:56,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:56,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:56,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:56,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:56,087 INFO L87 Difference]: Start difference. First operand 793 states and 2655 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:56,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:56,364 INFO L93 Difference]: Finished difference Result 1052 states and 3380 transitions. [2022-01-18 15:19:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:19:56,365 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:56,366 INFO L225 Difference]: With dead ends: 1052 [2022-01-18 15:19:56,366 INFO L226 Difference]: Without dead ends: 1010 [2022-01-18 15:19:56,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:19:56,366 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:56,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 150 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 499 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-01-18 15:19:56,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-01-18 15:19:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 777. [2022-01-18 15:19:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.341494845360825) internal successors, (2593), 776 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2593 transitions. [2022-01-18 15:19:56,375 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2593 transitions. Word has length 21 [2022-01-18 15:19:56,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:56,375 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 2593 transitions. [2022-01-18 15:19:56,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:56,376 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2593 transitions. [2022-01-18 15:19:56,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:56,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:56,377 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:56,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (612)] Ended with exit code 0 [2022-01-18 15:19:56,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2022-01-18 15:19:56,577 INFO L402 AbstractCegarLoop]: === Iteration 624 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:56,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:56,577 INFO L85 PathProgramCache]: Analyzing trace with hash -971318702, now seen corresponding path program 612 times [2022-01-18 15:19:56,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:56,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098699798] [2022-01-18 15:19:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:56,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:56,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:56,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098699798] [2022-01-18 15:19:56,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098699798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:56,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135396559] [2022-01-18 15:19:56,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:19:56,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:56,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:56,692 INFO L229 MonitoredProcess]: Starting monitored process 613 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:56,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (613)] Waiting until timeout for monitored process [2022-01-18 15:19:56,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:19:56,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:56,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:56,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:56,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:56,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:56,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:56,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:56,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:56,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:19:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:56,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:57,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:57,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:57,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:57,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:19:57,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:57,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:19:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:57,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135396559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:57,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:57,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:19:57,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230693923] [2022-01-18 15:19:57,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:57,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:19:57,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:57,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:19:57,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:19:57,193 INFO L87 Difference]: Start difference. First operand 777 states and 2593 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:57,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:57,613 INFO L93 Difference]: Finished difference Result 1132 states and 3656 transitions. [2022-01-18 15:19:57,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:19:57,613 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:57,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:57,615 INFO L225 Difference]: With dead ends: 1132 [2022-01-18 15:19:57,615 INFO L226 Difference]: Without dead ends: 1113 [2022-01-18 15:19:57,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:19:57,615 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:57,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 285 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 455 Invalid, 0 Unknown, 257 Unchecked, 0.2s Time] [2022-01-18 15:19:57,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-01-18 15:19:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 781. [2022-01-18 15:19:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.344871794871795) internal successors, (2609), 780 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2609 transitions. [2022-01-18 15:19:57,625 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2609 transitions. Word has length 21 [2022-01-18 15:19:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:57,625 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 2609 transitions. [2022-01-18 15:19:57,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2609 transitions. [2022-01-18 15:19:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:57,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:57,626 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:57,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (613)] Ended with exit code 0 [2022-01-18 15:19:57,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2022-01-18 15:19:57,826 INFO L402 AbstractCegarLoop]: === Iteration 625 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:57,826 INFO L85 PathProgramCache]: Analyzing trace with hash 549283021, now seen corresponding path program 613 times [2022-01-18 15:19:57,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:57,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502136772] [2022-01-18 15:19:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:57,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:57,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:57,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502136772] [2022-01-18 15:19:57,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502136772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:57,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995324707] [2022-01-18 15:19:57,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:19:57,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:57,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:57,929 INFO L229 MonitoredProcess]: Starting monitored process 614 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:57,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (614)] Waiting until timeout for monitored process [2022-01-18 15:19:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:57,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:57,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:58,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:58,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:58,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:58,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:58,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:19:58,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:58,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:19:58,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:58,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:19:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:58,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995324707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:58,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:58,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:19:58,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538744602] [2022-01-18 15:19:58,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:58,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:58,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:58,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:58,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:58,340 INFO L87 Difference]: Start difference. First operand 781 states and 2609 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:58,844 INFO L93 Difference]: Finished difference Result 1182 states and 3774 transitions. [2022-01-18 15:19:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:19:58,845 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:58,846 INFO L225 Difference]: With dead ends: 1182 [2022-01-18 15:19:58,846 INFO L226 Difference]: Without dead ends: 1122 [2022-01-18 15:19:58,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:19:58,847 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:58,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 221 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:19:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-01-18 15:19:58,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 787. [2022-01-18 15:19:58,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.337150127226463) internal successors, (2623), 786 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2623 transitions. [2022-01-18 15:19:58,856 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2623 transitions. Word has length 21 [2022-01-18 15:19:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:58,856 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 2623 transitions. [2022-01-18 15:19:58,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:58,856 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2623 transitions. [2022-01-18 15:19:58,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:58,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:58,857 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:19:58,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (614)] Ended with exit code 0 [2022-01-18 15:19:59,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 614 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2022-01-18 15:19:59,058 INFO L402 AbstractCegarLoop]: === Iteration 626 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:19:59,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:19:59,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1969381902, now seen corresponding path program 614 times [2022-01-18 15:19:59,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:19:59,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580373290] [2022-01-18 15:19:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:19:59,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:19:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:19:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:59,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:19:59,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580373290] [2022-01-18 15:19:59,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580373290] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:19:59,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758724259] [2022-01-18 15:19:59,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:19:59,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:19:59,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:19:59,159 INFO L229 MonitoredProcess]: Starting monitored process 615 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:19:59,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (615)] Waiting until timeout for monitored process [2022-01-18 15:19:59,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:19:59,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:19:59,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:19:59,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:19:59,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:59,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:19:59,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:59,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:19:59,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:19:59,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:19:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:59,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:19:59,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:59,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:19:59,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:59,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:19:59,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:19:59,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:19:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:19:59,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758724259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:19:59,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:19:59,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:19:59,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066491678] [2022-01-18 15:19:59,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:19:59,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:19:59,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:19:59,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:19:59,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:19:59,631 INFO L87 Difference]: Start difference. First operand 787 states and 2623 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:19:59,981 INFO L93 Difference]: Finished difference Result 1113 states and 3603 transitions. [2022-01-18 15:19:59,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:19:59,981 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:19:59,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:19:59,982 INFO L225 Difference]: With dead ends: 1113 [2022-01-18 15:19:59,983 INFO L226 Difference]: Without dead ends: 1090 [2022-01-18 15:19:59,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:19:59,983 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:19:59,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 250 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 575 Invalid, 0 Unknown, 311 Unchecked, 0.2s Time] [2022-01-18 15:19:59,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-01-18 15:19:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 785. [2022-01-18 15:19:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.3392857142857144) internal successors, (2618), 784 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2618 transitions. [2022-01-18 15:19:59,992 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2618 transitions. Word has length 21 [2022-01-18 15:19:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:19:59,992 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2618 transitions. [2022-01-18 15:19:59,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:19:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2618 transitions. [2022-01-18 15:19:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:19:59,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:19:59,993 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:00,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (615)] Ended with exit code 0 [2022-01-18 15:20:00,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable625 [2022-01-18 15:20:00,194 INFO L402 AbstractCegarLoop]: === Iteration 627 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:00,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:00,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1982435743, now seen corresponding path program 615 times [2022-01-18 15:20:00,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:00,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897164735] [2022-01-18 15:20:00,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:00,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:00,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:00,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897164735] [2022-01-18 15:20:00,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897164735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:00,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903155795] [2022-01-18 15:20:00,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:00,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:00,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:00,286 INFO L229 MonitoredProcess]: Starting monitored process 616 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:00,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (616)] Waiting until timeout for monitored process [2022-01-18 15:20:00,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:20:00,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:00,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:00,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:00,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:00,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:00,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:00,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:00,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:00,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:00,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:00,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:00,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:00,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903155795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:00,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:00,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:20:00,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560015528] [2022-01-18 15:20:00,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:00,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:00,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:00,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:00,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:00,612 INFO L87 Difference]: Start difference. First operand 785 states and 2618 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:00,846 INFO L93 Difference]: Finished difference Result 930 states and 3033 transitions. [2022-01-18 15:20:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:20:00,846 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:00,848 INFO L225 Difference]: With dead ends: 930 [2022-01-18 15:20:00,848 INFO L226 Difference]: Without dead ends: 886 [2022-01-18 15:20:00,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:00,848 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:00,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 156 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-18 15:20:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 785. [2022-01-18 15:20:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.3392857142857144) internal successors, (2618), 784 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2618 transitions. [2022-01-18 15:20:00,857 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2618 transitions. Word has length 21 [2022-01-18 15:20:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:00,857 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2618 transitions. [2022-01-18 15:20:00,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2618 transitions. [2022-01-18 15:20:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:00,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:00,858 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:00,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (616)] Ended with exit code 0 [2022-01-18 15:20:01,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,616 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:01,058 INFO L402 AbstractCegarLoop]: === Iteration 628 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:01,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:01,059 INFO L85 PathProgramCache]: Analyzing trace with hash 328095510, now seen corresponding path program 616 times [2022-01-18 15:20:01,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:01,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941952623] [2022-01-18 15:20:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:01,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:01,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:01,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941952623] [2022-01-18 15:20:01,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941952623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:01,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505035954] [2022-01-18 15:20:01,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:01,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:01,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:01,176 INFO L229 MonitoredProcess]: Starting monitored process 617 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:01,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (617)] Waiting until timeout for monitored process [2022-01-18 15:20:01,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:01,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:01,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:01,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:01,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:01,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:01,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:01,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:01,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:01,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:01,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:01,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:01,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:01,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505035954] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:01,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:01,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:01,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659381988] [2022-01-18 15:20:01,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:01,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:01,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:01,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:01,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:01,590 INFO L87 Difference]: Start difference. First operand 785 states and 2618 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:02,046 INFO L93 Difference]: Finished difference Result 1134 states and 3656 transitions. [2022-01-18 15:20:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:20:02,046 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:02,048 INFO L225 Difference]: With dead ends: 1134 [2022-01-18 15:20:02,048 INFO L226 Difference]: Without dead ends: 1115 [2022-01-18 15:20:02,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:20:02,048 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:02,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 220 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2022-01-18 15:20:02,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 791. [2022-01-18 15:20:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.3443037974683545) internal successors, (2642), 790 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:02,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2642 transitions. [2022-01-18 15:20:02,058 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2642 transitions. Word has length 21 [2022-01-18 15:20:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:02,058 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 2642 transitions. [2022-01-18 15:20:02,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2642 transitions. [2022-01-18 15:20:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:02,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:02,059 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:02,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (617)] Ended with exit code 0 [2022-01-18 15:20:02,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2022-01-18 15:20:02,259 INFO L402 AbstractCegarLoop]: === Iteration 629 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:02,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1719259434, now seen corresponding path program 617 times [2022-01-18 15:20:02,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:02,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246743624] [2022-01-18 15:20:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:02,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:02,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:02,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246743624] [2022-01-18 15:20:02,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246743624] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:02,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129491977] [2022-01-18 15:20:02,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:02,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:02,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:02,383 INFO L229 MonitoredProcess]: Starting monitored process 618 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:02,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (618)] Waiting until timeout for monitored process [2022-01-18 15:20:02,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:02,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:02,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:02,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:02,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:02,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:02,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:02,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:02,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:02,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:02,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:20:02,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:02,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:02,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129491977] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:02,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:02,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:02,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759144279] [2022-01-18 15:20:02,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:02,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:02,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:02,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:02,982 INFO L87 Difference]: Start difference. First operand 791 states and 2642 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:03,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:03,710 INFO L93 Difference]: Finished difference Result 1271 states and 4040 transitions. [2022-01-18 15:20:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:20:03,710 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:03,712 INFO L225 Difference]: With dead ends: 1271 [2022-01-18 15:20:03,712 INFO L226 Difference]: Without dead ends: 1214 [2022-01-18 15:20:03,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:20:03,712 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 130 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:03,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 300 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:20:03,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-01-18 15:20:03,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 793. [2022-01-18 15:20:03,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.3484848484848486) internal successors, (2652), 792 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:03,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2652 transitions. [2022-01-18 15:20:03,723 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2652 transitions. Word has length 21 [2022-01-18 15:20:03,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:03,723 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 2652 transitions. [2022-01-18 15:20:03,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:03,723 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2652 transitions. [2022-01-18 15:20:03,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:03,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:03,730 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:03,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (618)] Ended with exit code 0 [2022-01-18 15:20:03,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 618 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable628 [2022-01-18 15:20:03,931 INFO L402 AbstractCegarLoop]: === Iteration 630 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1505789197, now seen corresponding path program 618 times [2022-01-18 15:20:03,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:03,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547257728] [2022-01-18 15:20:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:03,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:04,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:04,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547257728] [2022-01-18 15:20:04,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547257728] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:04,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178012104] [2022-01-18 15:20:04,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:04,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:04,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:04,047 INFO L229 MonitoredProcess]: Starting monitored process 619 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:04,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (619)] Waiting until timeout for monitored process [2022-01-18 15:20:04,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:20:04,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:04,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:04,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:04,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:04,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:04,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:04,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:04,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:04,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:04,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:04,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:04,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:20:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:04,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178012104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:04,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:04,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:20:04,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570902607] [2022-01-18 15:20:04,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:04,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:04,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:04,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:04,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:04,470 INFO L87 Difference]: Start difference. First operand 793 states and 2652 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:05,133 INFO L93 Difference]: Finished difference Result 1253 states and 3971 transitions. [2022-01-18 15:20:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:20:05,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:05,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:05,135 INFO L225 Difference]: With dead ends: 1253 [2022-01-18 15:20:05,135 INFO L226 Difference]: Without dead ends: 1199 [2022-01-18 15:20:05,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:20:05,135 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 113 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:05,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 241 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-01-18 15:20:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 798. [2022-01-18 15:20:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.35633626097867) internal successors, (2675), 797 states have internal predecessors, (2675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2675 transitions. [2022-01-18 15:20:05,147 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2675 transitions. Word has length 21 [2022-01-18 15:20:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:05,147 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 2675 transitions. [2022-01-18 15:20:05,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:05,147 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2675 transitions. [2022-01-18 15:20:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:05,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:05,148 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:05,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (619)] Ended with exit code 0 [2022-01-18 15:20:05,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,619 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:05,348 INFO L402 AbstractCegarLoop]: === Iteration 631 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:05,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash 650232469, now seen corresponding path program 619 times [2022-01-18 15:20:05,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:05,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371899487] [2022-01-18 15:20:05,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:05,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:05,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:05,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371899487] [2022-01-18 15:20:05,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371899487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:05,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804978793] [2022-01-18 15:20:05,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:05,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:05,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:05,443 INFO L229 MonitoredProcess]: Starting monitored process 620 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:05,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (620)] Waiting until timeout for monitored process [2022-01-18 15:20:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:05,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:05,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:05,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:05,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:05,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:05,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:05,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:05,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:05,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:05,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:05,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:05,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:05,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804978793] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:05,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:05,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:20:05,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543350772] [2022-01-18 15:20:05,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:05,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:05,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:05,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:05,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:05,799 INFO L87 Difference]: Start difference. First operand 798 states and 2675 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:05,998 INFO L93 Difference]: Finished difference Result 1020 states and 3308 transitions. [2022-01-18 15:20:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:20:05,998 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:06,000 INFO L225 Difference]: With dead ends: 1020 [2022-01-18 15:20:06,000 INFO L226 Difference]: Without dead ends: 962 [2022-01-18 15:20:06,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:06,000 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 70 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:06,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 141 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-01-18 15:20:06,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 792. [2022-01-18 15:20:06,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.3577749683944376) internal successors, (2656), 791 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2656 transitions. [2022-01-18 15:20:06,009 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2656 transitions. Word has length 21 [2022-01-18 15:20:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:06,009 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 2656 transitions. [2022-01-18 15:20:06,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:06,009 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2656 transitions. [2022-01-18 15:20:06,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:06,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:06,010 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:06,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (620)] Ended with exit code 0 [2022-01-18 15:20:06,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 620 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2022-01-18 15:20:06,210 INFO L402 AbstractCegarLoop]: === Iteration 632 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:06,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:06,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1742160522, now seen corresponding path program 620 times [2022-01-18 15:20:06,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:06,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174600057] [2022-01-18 15:20:06,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:06,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:06,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:06,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174600057] [2022-01-18 15:20:06,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174600057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:06,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560333893] [2022-01-18 15:20:06,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:06,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:06,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:06,331 INFO L229 MonitoredProcess]: Starting monitored process 621 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:06,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (621)] Waiting until timeout for monitored process [2022-01-18 15:20:06,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:06,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:06,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:06,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:06,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:06,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:06,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:06,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:06,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:06,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:06,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:06,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:06,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:06,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:06,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560333893] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:06,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:06,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:06,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575163009] [2022-01-18 15:20:06,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:06,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:06,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:06,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:06,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:06,755 INFO L87 Difference]: Start difference. First operand 792 states and 2656 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:07,402 INFO L93 Difference]: Finished difference Result 1343 states and 4282 transitions. [2022-01-18 15:20:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:20:07,402 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:07,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:07,404 INFO L225 Difference]: With dead ends: 1343 [2022-01-18 15:20:07,404 INFO L226 Difference]: Without dead ends: 1320 [2022-01-18 15:20:07,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:20:07,405 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 129 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:07,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 269 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:20:07,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-01-18 15:20:07,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 795. [2022-01-18 15:20:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 3.363979848866499) internal successors, (2671), 794 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2671 transitions. [2022-01-18 15:20:07,415 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2671 transitions. Word has length 21 [2022-01-18 15:20:07,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:07,415 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 2671 transitions. [2022-01-18 15:20:07,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:07,415 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2671 transitions. [2022-01-18 15:20:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:07,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:07,416 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:07,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (621)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:07,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 621 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2022-01-18 15:20:07,617 INFO L402 AbstractCegarLoop]: === Iteration 633 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:07,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1108692827, now seen corresponding path program 621 times [2022-01-18 15:20:07,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:07,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050432538] [2022-01-18 15:20:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:07,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:07,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:07,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050432538] [2022-01-18 15:20:07,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050432538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:07,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689011622] [2022-01-18 15:20:07,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:07,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:07,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:07,742 INFO L229 MonitoredProcess]: Starting monitored process 622 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:07,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (622)] Waiting until timeout for monitored process [2022-01-18 15:20:07,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:20:07,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:07,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:07,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:07,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:07,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:07,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:08,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:08,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:08,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:08,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:08,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:08,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:20:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:08,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689011622] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:08,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:08,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:08,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709152359] [2022-01-18 15:20:08,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:08,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:08,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:08,164 INFO L87 Difference]: Start difference. First operand 795 states and 2671 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:08,686 INFO L93 Difference]: Finished difference Result 1114 states and 3581 transitions. [2022-01-18 15:20:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:20:08,686 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:08,687 INFO L225 Difference]: With dead ends: 1114 [2022-01-18 15:20:08,687 INFO L226 Difference]: Without dead ends: 1093 [2022-01-18 15:20:08,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:20:08,688 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 127 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:08,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 231 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:08,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-01-18 15:20:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 793. [2022-01-18 15:20:08,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.3573232323232323) internal successors, (2659), 792 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2659 transitions. [2022-01-18 15:20:08,697 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2659 transitions. Word has length 21 [2022-01-18 15:20:08,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:08,697 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 2659 transitions. [2022-01-18 15:20:08,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2659 transitions. [2022-01-18 15:20:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:08,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:08,698 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:08,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (622)] Ended with exit code 0 [2022-01-18 15:20:08,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 622 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2022-01-18 15:20:08,899 INFO L402 AbstractCegarLoop]: === Iteration 634 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:08,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:08,899 INFO L85 PathProgramCache]: Analyzing trace with hash -2057471224, now seen corresponding path program 622 times [2022-01-18 15:20:08,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:08,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697175510] [2022-01-18 15:20:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:08,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:09,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:09,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697175510] [2022-01-18 15:20:09,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697175510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:09,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193218404] [2022-01-18 15:20:09,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:09,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:09,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:09,008 INFO L229 MonitoredProcess]: Starting monitored process 623 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:09,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (623)] Waiting until timeout for monitored process [2022-01-18 15:20:09,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:09,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:09,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:09,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:09,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:09,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:09,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:09,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:09,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:09,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:09,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:09,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:09,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:09,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193218404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:09,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:09,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:09,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681376792] [2022-01-18 15:20:09,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:09,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:09,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:09,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:09,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:09,402 INFO L87 Difference]: Start difference. First operand 793 states and 2659 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:09,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:09,872 INFO L93 Difference]: Finished difference Result 1167 states and 3784 transitions. [2022-01-18 15:20:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:20:09,872 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:09,874 INFO L225 Difference]: With dead ends: 1167 [2022-01-18 15:20:09,874 INFO L226 Difference]: Without dead ends: 1148 [2022-01-18 15:20:09,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:20:09,874 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:09,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 224 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-01-18 15:20:09,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 798. [2022-01-18 15:20:09,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.3575909661229613) internal successors, (2676), 797 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:09,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2676 transitions. [2022-01-18 15:20:09,884 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2676 transitions. Word has length 21 [2022-01-18 15:20:09,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:09,884 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 2676 transitions. [2022-01-18 15:20:09,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:09,884 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2676 transitions. [2022-01-18 15:20:09,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:09,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:09,885 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:09,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (623)] Ended with exit code 0 [2022-01-18 15:20:10,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2022-01-18 15:20:10,086 INFO L402 AbstractCegarLoop]: === Iteration 635 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:10,086 INFO L85 PathProgramCache]: Analyzing trace with hash 190141128, now seen corresponding path program 623 times [2022-01-18 15:20:10,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:10,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385692407] [2022-01-18 15:20:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:10,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:10,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:10,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385692407] [2022-01-18 15:20:10,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385692407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:10,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015111092] [2022-01-18 15:20:10,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:10,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:10,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:10,199 INFO L229 MonitoredProcess]: Starting monitored process 624 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:10,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (624)] Waiting until timeout for monitored process [2022-01-18 15:20:10,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:10,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:10,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:10,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:10,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:10,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:10,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:10,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:10,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:10,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:10,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:20:10,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:10,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:10,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015111092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:10,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:10,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:10,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459683036] [2022-01-18 15:20:10,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:10,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:10,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:10,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:10,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:10,764 INFO L87 Difference]: Start difference. First operand 798 states and 2676 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:11,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:11,448 INFO L93 Difference]: Finished difference Result 1325 states and 4234 transitions. [2022-01-18 15:20:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:20:11,448 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:11,450 INFO L225 Difference]: With dead ends: 1325 [2022-01-18 15:20:11,450 INFO L226 Difference]: Without dead ends: 1268 [2022-01-18 15:20:11,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:20:11,450 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 113 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:11,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 271 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:20:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2022-01-18 15:20:11,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 797. [2022-01-18 15:20:11,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.3555276381909547) internal successors, (2671), 796 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2671 transitions. [2022-01-18 15:20:11,461 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2671 transitions. Word has length 21 [2022-01-18 15:20:11,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:11,461 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 2671 transitions. [2022-01-18 15:20:11,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2671 transitions. [2022-01-18 15:20:11,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:11,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:11,462 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:11,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (624)] Ended with exit code 0 [2022-01-18 15:20:11,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634,624 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:11,662 INFO L402 AbstractCegarLoop]: === Iteration 636 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:11,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:11,662 INFO L85 PathProgramCache]: Analyzing trace with hash 905292798, now seen corresponding path program 624 times [2022-01-18 15:20:11,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:11,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720903039] [2022-01-18 15:20:11,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:11,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:11,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:11,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720903039] [2022-01-18 15:20:11,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720903039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:11,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576092846] [2022-01-18 15:20:11,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:11,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:11,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:11,763 INFO L229 MonitoredProcess]: Starting monitored process 625 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:11,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (625)] Waiting until timeout for monitored process [2022-01-18 15:20:11,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:20:11,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:11,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:11,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:11,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:11,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:11,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:11,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:11,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:20:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:11,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:12,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:12,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:12,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:12,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:12,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:12,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:12,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576092846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:12,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:12,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:20:12,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647651739] [2022-01-18 15:20:12,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:12,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:12,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:12,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:12,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:12,180 INFO L87 Difference]: Start difference. First operand 797 states and 2671 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:12,525 INFO L93 Difference]: Finished difference Result 1002 states and 3297 transitions. [2022-01-18 15:20:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:20:12,526 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:12,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:12,527 INFO L225 Difference]: With dead ends: 1002 [2022-01-18 15:20:12,527 INFO L226 Difference]: Without dead ends: 983 [2022-01-18 15:20:12,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:20:12,527 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:12,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 204 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 737 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-01-18 15:20:12,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-01-18 15:20:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 801. [2022-01-18 15:20:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.35875) internal successors, (2687), 800 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:12,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2687 transitions. [2022-01-18 15:20:12,536 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2687 transitions. Word has length 21 [2022-01-18 15:20:12,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:12,536 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 2687 transitions. [2022-01-18 15:20:12,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:12,536 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2687 transitions. [2022-01-18 15:20:12,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:12,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:12,537 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:12,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (625)] Ended with exit code 0 [2022-01-18 15:20:12,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2022-01-18 15:20:12,738 INFO L402 AbstractCegarLoop]: === Iteration 637 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:12,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:12,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1492208400, now seen corresponding path program 625 times [2022-01-18 15:20:12,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:12,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360032841] [2022-01-18 15:20:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:12,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:12,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:12,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360032841] [2022-01-18 15:20:12,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360032841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:12,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496415516] [2022-01-18 15:20:12,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:12,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:12,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:12,842 INFO L229 MonitoredProcess]: Starting monitored process 626 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:12,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (626)] Waiting until timeout for monitored process [2022-01-18 15:20:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:12,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:12,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:12,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:12,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:13,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:13,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:13,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:13,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:13,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:13,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:13,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:13,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496415516] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:13,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:13,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:13,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457164019] [2022-01-18 15:20:13,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:13,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:13,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:13,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:13,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:13,232 INFO L87 Difference]: Start difference. First operand 801 states and 2687 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:13,555 INFO L93 Difference]: Finished difference Result 1056 states and 3426 transitions. [2022-01-18 15:20:13,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:20:13,555 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:13,557 INFO L225 Difference]: With dead ends: 1056 [2022-01-18 15:20:13,557 INFO L226 Difference]: Without dead ends: 1037 [2022-01-18 15:20:13,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:20:13,558 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 79 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:13,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 170 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:13,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-01-18 15:20:13,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 793. [2022-01-18 15:20:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.3573232323232323) internal successors, (2659), 792 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2659 transitions. [2022-01-18 15:20:13,567 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2659 transitions. Word has length 21 [2022-01-18 15:20:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:13,567 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 2659 transitions. [2022-01-18 15:20:13,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2659 transitions. [2022-01-18 15:20:13,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:13,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:13,568 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:13,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (626)] Ended with exit code 0 [2022-01-18 15:20:13,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,626 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:13,769 INFO L402 AbstractCegarLoop]: === Iteration 638 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:13,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:13,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2094312809, now seen corresponding path program 626 times [2022-01-18 15:20:13,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:13,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826671549] [2022-01-18 15:20:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:13,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:13,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:13,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826671549] [2022-01-18 15:20:13,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826671549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:13,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346178171] [2022-01-18 15:20:13,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:13,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:13,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:13,862 INFO L229 MonitoredProcess]: Starting monitored process 627 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:13,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (627)] Waiting until timeout for monitored process [2022-01-18 15:20:13,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:13,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:13,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:13,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:13,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:13,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:13,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:14,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:14,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:14,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:14,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:14,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:14,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:14,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:14,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346178171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:14,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:14,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:20:14,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781263120] [2022-01-18 15:20:14,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:14,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:14,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:14,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:14,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:14,267 INFO L87 Difference]: Start difference. First operand 793 states and 2659 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:14,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:14,874 INFO L93 Difference]: Finished difference Result 1220 states and 3880 transitions. [2022-01-18 15:20:14,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:20:14,874 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:14,876 INFO L225 Difference]: With dead ends: 1220 [2022-01-18 15:20:14,876 INFO L226 Difference]: Without dead ends: 1166 [2022-01-18 15:20:14,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:20:14,876 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:14,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 317 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:20:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2022-01-18 15:20:14,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 813. [2022-01-18 15:20:14,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.3805418719211824) internal successors, (2745), 812 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2745 transitions. [2022-01-18 15:20:14,886 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2745 transitions. Word has length 21 [2022-01-18 15:20:14,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:14,886 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 2745 transitions. [2022-01-18 15:20:14,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2745 transitions. [2022-01-18 15:20:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:14,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:14,887 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:14,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (627)] Ended with exit code 0 [2022-01-18 15:20:15,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 627 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable637 [2022-01-18 15:20:15,088 INFO L402 AbstractCegarLoop]: === Iteration 639 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:15,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:15,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1345097759, now seen corresponding path program 627 times [2022-01-18 15:20:15,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:15,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655111562] [2022-01-18 15:20:15,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:15,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:15,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:15,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655111562] [2022-01-18 15:20:15,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655111562] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:15,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902366168] [2022-01-18 15:20:15,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:15,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:15,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:15,179 INFO L229 MonitoredProcess]: Starting monitored process 628 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:15,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (628)] Waiting until timeout for monitored process [2022-01-18 15:20:15,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:20:15,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:15,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:15,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:15,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:15,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:20:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:15,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:15,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:15,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:15,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:15,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:15,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:15,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:15,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902366168] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:15,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:15,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-18 15:20:15,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304873182] [2022-01-18 15:20:15,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:15,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:15,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:15,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:15,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:15,510 INFO L87 Difference]: Start difference. First operand 813 states and 2745 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:15,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:15,728 INFO L93 Difference]: Finished difference Result 985 states and 3221 transitions. [2022-01-18 15:20:15,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:20:15,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:15,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:15,730 INFO L225 Difference]: With dead ends: 985 [2022-01-18 15:20:15,730 INFO L226 Difference]: Without dead ends: 913 [2022-01-18 15:20:15,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:15,730 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:15,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 160 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-01-18 15:20:15,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 807. [2022-01-18 15:20:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.3746898263027294) internal successors, (2720), 806 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2720 transitions. [2022-01-18 15:20:15,739 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2720 transitions. Word has length 21 [2022-01-18 15:20:15,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:15,739 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 2720 transitions. [2022-01-18 15:20:15,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:15,739 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2720 transitions. [2022-01-18 15:20:15,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:15,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:15,740 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:15,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (628)] Ended with exit code 0 [2022-01-18 15:20:15,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable638 [2022-01-18 15:20:15,941 INFO L402 AbstractCegarLoop]: === Iteration 640 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:15,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:15,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2131151779, now seen corresponding path program 628 times [2022-01-18 15:20:15,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:15,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394850893] [2022-01-18 15:20:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:15,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:16,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:16,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394850893] [2022-01-18 15:20:16,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394850893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:16,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574597661] [2022-01-18 15:20:16,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:16,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:16,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:16,043 INFO L229 MonitoredProcess]: Starting monitored process 629 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:16,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (629)] Waiting until timeout for monitored process [2022-01-18 15:20:16,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:16,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:16,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:16,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:16,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:16,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:16,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:16,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:16,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:20:16,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:16,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:16,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:16,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:20:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:16,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574597661] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:16,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:16,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:16,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389610411] [2022-01-18 15:20:16,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:16,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:16,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:16,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:16,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:16,444 INFO L87 Difference]: Start difference. First operand 807 states and 2720 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:16,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:16,847 INFO L93 Difference]: Finished difference Result 1119 states and 3597 transitions. [2022-01-18 15:20:16,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:20:16,847 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:16,849 INFO L225 Difference]: With dead ends: 1119 [2022-01-18 15:20:16,849 INFO L226 Difference]: Without dead ends: 1077 [2022-01-18 15:20:16,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:20:16,849 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 81 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:16,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 202 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:16,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-01-18 15:20:16,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 796. [2022-01-18 15:20:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.3660377358490567) internal successors, (2676), 795 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:16,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2676 transitions. [2022-01-18 15:20:16,858 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2676 transitions. Word has length 21 [2022-01-18 15:20:16,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:16,859 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 2676 transitions. [2022-01-18 15:20:16,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:16,859 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2676 transitions. [2022-01-18 15:20:16,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:16,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:16,860 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:16,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (629)] Ended with exit code 0 [2022-01-18 15:20:17,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639,629 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:17,060 INFO L402 AbstractCegarLoop]: === Iteration 641 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:17,060 INFO L85 PathProgramCache]: Analyzing trace with hash -893538050, now seen corresponding path program 629 times [2022-01-18 15:20:17,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:17,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158035294] [2022-01-18 15:20:17,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:17,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:17,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158035294] [2022-01-18 15:20:17,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158035294] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265299086] [2022-01-18 15:20:17,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:17,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:17,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:17,166 INFO L229 MonitoredProcess]: Starting monitored process 630 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:17,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (630)] Waiting until timeout for monitored process [2022-01-18 15:20:17,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:20:17,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:17,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:17,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:17,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:17,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:17,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:17,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:17,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:17,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:17,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:17,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-18 15:20:17,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:17,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:20:17,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:17,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:17,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265299086] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:17,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:17,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-01-18 15:20:17,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911904273] [2022-01-18 15:20:17,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:17,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:20:17,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:17,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:20:17,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:20:17,763 INFO L87 Difference]: Start difference. First operand 796 states and 2676 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:18,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:18,604 INFO L93 Difference]: Finished difference Result 1342 states and 4274 transitions. [2022-01-18 15:20:18,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:20:18,604 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:18,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:18,606 INFO L225 Difference]: With dead ends: 1342 [2022-01-18 15:20:18,606 INFO L226 Difference]: Without dead ends: 1273 [2022-01-18 15:20:18,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1183, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:20:18,606 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 145 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:18,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 311 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 990 Invalid, 0 Unknown, 23 Unchecked, 0.4s Time] [2022-01-18 15:20:18,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-01-18 15:20:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 802. [2022-01-18 15:20:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.377028714107366) internal successors, (2705), 801 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2705 transitions. [2022-01-18 15:20:18,617 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2705 transitions. Word has length 21 [2022-01-18 15:20:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:18,617 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 2705 transitions. [2022-01-18 15:20:18,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2705 transitions. [2022-01-18 15:20:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:18,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:18,618 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:18,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (630)] Ended with exit code 0 [2022-01-18 15:20:18,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable640,630 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:18,819 INFO L402 AbstractCegarLoop]: === Iteration 642 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:18,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:18,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1957315299, now seen corresponding path program 630 times [2022-01-18 15:20:18,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:18,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031392594] [2022-01-18 15:20:18,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:18,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:18,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:18,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031392594] [2022-01-18 15:20:18,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031392594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:18,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056390237] [2022-01-18 15:20:18,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:18,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:18,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:18,938 INFO L229 MonitoredProcess]: Starting monitored process 631 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:18,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (631)] Waiting until timeout for monitored process [2022-01-18 15:20:18,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:20:18,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:18,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:18,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:19,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:19,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:19,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:19,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:19,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:19,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:20:19,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:19,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:19,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:19,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:20:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:19,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056390237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:19,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:19,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:19,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292416203] [2022-01-18 15:20:19,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:19,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:19,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:19,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:19,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:19,361 INFO L87 Difference]: Start difference. First operand 802 states and 2705 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:19,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:19,756 INFO L93 Difference]: Finished difference Result 1108 states and 3589 transitions. [2022-01-18 15:20:19,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:20:19,756 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:19,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:19,758 INFO L225 Difference]: With dead ends: 1108 [2022-01-18 15:20:19,758 INFO L226 Difference]: Without dead ends: 1087 [2022-01-18 15:20:19,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:20:19,758 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 99 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:19,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 215 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:19,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-01-18 15:20:19,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 797. [2022-01-18 15:20:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.3731155778894473) internal successors, (2685), 796 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2685 transitions. [2022-01-18 15:20:19,767 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2685 transitions. Word has length 21 [2022-01-18 15:20:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:19,768 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 2685 transitions. [2022-01-18 15:20:19,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:19,768 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2685 transitions. [2022-01-18 15:20:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:19,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:19,769 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:19,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (631)] Ended with exit code 0 [2022-01-18 15:20:19,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2022-01-18 15:20:19,969 INFO L402 AbstractCegarLoop]: === Iteration 643 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash -790027896, now seen corresponding path program 631 times [2022-01-18 15:20:19,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:19,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951748595] [2022-01-18 15:20:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:19,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:20,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:20,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951748595] [2022-01-18 15:20:20,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951748595] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:20,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226201615] [2022-01-18 15:20:20,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:20,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:20,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:20,084 INFO L229 MonitoredProcess]: Starting monitored process 632 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:20,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (632)] Waiting until timeout for monitored process [2022-01-18 15:20:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:20,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:20,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:20,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:20,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:20,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:20,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:20,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:20:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:20,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:20,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:20,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:20,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:20,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:20,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:20,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:20,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226201615] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:20,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:20,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:20:20,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077426669] [2022-01-18 15:20:20,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:20,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:20:20,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:20,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:20:20,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:20:20,529 INFO L87 Difference]: Start difference. First operand 797 states and 2685 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:20,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:20,932 INFO L93 Difference]: Finished difference Result 1042 states and 3435 transitions. [2022-01-18 15:20:20,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:20:20,932 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:20,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:20,934 INFO L225 Difference]: With dead ends: 1042 [2022-01-18 15:20:20,934 INFO L226 Difference]: Without dead ends: 1023 [2022-01-18 15:20:20,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:20:20,934 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:20,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 246 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 870 Invalid, 0 Unknown, 175 Unchecked, 0.3s Time] [2022-01-18 15:20:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-01-18 15:20:20,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 801. [2022-01-18 15:20:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.37625) internal successors, (2701), 800 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:20,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2701 transitions. [2022-01-18 15:20:20,943 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2701 transitions. Word has length 21 [2022-01-18 15:20:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:20,944 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 2701 transitions. [2022-01-18 15:20:20,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2701 transitions. [2022-01-18 15:20:20,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:20,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:20,945 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:20,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (632)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:21,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 632 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2022-01-18 15:20:21,145 INFO L402 AbstractCegarLoop]: === Iteration 644 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:21,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:21,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2044959888, now seen corresponding path program 632 times [2022-01-18 15:20:21,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:21,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736433677] [2022-01-18 15:20:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:21,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:21,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:21,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736433677] [2022-01-18 15:20:21,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736433677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:21,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636928561] [2022-01-18 15:20:21,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:21,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:21,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:21,255 INFO L229 MonitoredProcess]: Starting monitored process 633 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:21,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (633)] Waiting until timeout for monitored process [2022-01-18 15:20:21,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:21,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:21,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:21,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:21,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:21,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:21,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:21,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:21,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:20:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:21,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:21,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:21,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:21,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:21,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:21,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:21,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:21,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636928561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:21,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:21,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:20:21,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113034642] [2022-01-18 15:20:21,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:21,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:20:21,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:21,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:20:21,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:20:21,745 INFO L87 Difference]: Start difference. First operand 801 states and 2701 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:22,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:22,065 INFO L93 Difference]: Finished difference Result 1137 states and 3655 transitions. [2022-01-18 15:20:22,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:20:22,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:22,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:22,067 INFO L225 Difference]: With dead ends: 1137 [2022-01-18 15:20:22,067 INFO L226 Difference]: Without dead ends: 1099 [2022-01-18 15:20:22,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:20:22,067 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 65 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:22,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 278 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 660 Invalid, 0 Unknown, 137 Unchecked, 0.2s Time] [2022-01-18 15:20:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-01-18 15:20:22,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 808. [2022-01-18 15:20:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.369268897149938) internal successors, (2719), 807 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2719 transitions. [2022-01-18 15:20:22,076 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2719 transitions. Word has length 21 [2022-01-18 15:20:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:22,076 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 2719 transitions. [2022-01-18 15:20:22,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2719 transitions. [2022-01-18 15:20:22,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:22,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:22,077 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:22,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (633)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:22,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,633 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:22,278 INFO L402 AbstractCegarLoop]: === Iteration 645 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:22,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:22,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2107229506, now seen corresponding path program 633 times [2022-01-18 15:20:22,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:22,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487371380] [2022-01-18 15:20:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:22,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:22,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:22,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487371380] [2022-01-18 15:20:22,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487371380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:22,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042030800] [2022-01-18 15:20:22,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:22,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:22,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:22,387 INFO L229 MonitoredProcess]: Starting monitored process 634 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:22,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (634)] Waiting until timeout for monitored process [2022-01-18 15:20:22,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:20:22,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:22,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:22,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:22,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:22,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:22,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:22,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:22,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:22,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:22,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:22,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:22,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:22,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042030800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:22,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:22,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:22,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747925151] [2022-01-18 15:20:22,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:22,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:22,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:22,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:22,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:22,816 INFO L87 Difference]: Start difference. First operand 808 states and 2719 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:23,169 INFO L93 Difference]: Finished difference Result 1120 states and 3613 transitions. [2022-01-18 15:20:23,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:20:23,169 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:23,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:23,171 INFO L225 Difference]: With dead ends: 1120 [2022-01-18 15:20:23,171 INFO L226 Difference]: Without dead ends: 1101 [2022-01-18 15:20:23,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:20:23,171 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 93 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:23,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 210 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:23,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-01-18 15:20:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 801. [2022-01-18 15:20:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.37125) internal successors, (2697), 800 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:23,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2697 transitions. [2022-01-18 15:20:23,181 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2697 transitions. Word has length 21 [2022-01-18 15:20:23,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:23,181 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 2697 transitions. [2022-01-18 15:20:23,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2697 transitions. [2022-01-18 15:20:23,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:23,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:23,182 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:23,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (634)] Ended with exit code 0 [2022-01-18 15:20:23,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable644,634 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:23,382 INFO L402 AbstractCegarLoop]: === Iteration 646 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:23,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:23,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1954470160, now seen corresponding path program 634 times [2022-01-18 15:20:23,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:23,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877025219] [2022-01-18 15:20:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:23,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:23,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:23,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877025219] [2022-01-18 15:20:23,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877025219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:23,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852668826] [2022-01-18 15:20:23,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:23,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:23,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:23,510 INFO L229 MonitoredProcess]: Starting monitored process 635 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:23,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (635)] Waiting until timeout for monitored process [2022-01-18 15:20:23,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:23,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:23,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:23,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:23,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:23,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:23,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:23,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:23,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:23,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:23,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:23,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:23,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:23,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:23,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:23,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:23,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852668826] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:23,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:23,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:20:23,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847473724] [2022-01-18 15:20:23,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:23,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:23,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:23,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:23,975 INFO L87 Difference]: Start difference. First operand 801 states and 2697 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:24,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:24,501 INFO L93 Difference]: Finished difference Result 1199 states and 3828 transitions. [2022-01-18 15:20:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:20:24,501 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:24,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:24,503 INFO L225 Difference]: With dead ends: 1199 [2022-01-18 15:20:24,503 INFO L226 Difference]: Without dead ends: 1176 [2022-01-18 15:20:24,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:20:24,504 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:24,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 291 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 864 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-01-18 15:20:24,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-01-18 15:20:24,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 799. [2022-01-18 15:20:24,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.3734335839599) internal successors, (2692), 798 states have internal predecessors, (2692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:24,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2692 transitions. [2022-01-18 15:20:24,514 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2692 transitions. Word has length 21 [2022-01-18 15:20:24,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:24,514 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 2692 transitions. [2022-01-18 15:20:24,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:24,514 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2692 transitions. [2022-01-18 15:20:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:24,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:24,515 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:24,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (635)] Ended with exit code 0 [2022-01-18 15:20:24,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 635 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2022-01-18 15:20:24,715 INFO L402 AbstractCegarLoop]: === Iteration 647 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:24,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:24,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1030624922, now seen corresponding path program 635 times [2022-01-18 15:20:24,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:24,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005667275] [2022-01-18 15:20:24,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:24,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:24,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:24,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005667275] [2022-01-18 15:20:24,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005667275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:24,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110515003] [2022-01-18 15:20:24,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:24,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:24,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:24,803 INFO L229 MonitoredProcess]: Starting monitored process 636 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:24,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (636)] Waiting until timeout for monitored process [2022-01-18 15:20:24,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:20:24,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:24,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:24,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:24,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:25,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-01-18 15:20:25,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-01-18 15:20:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:25,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:25,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:25,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:25,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:25,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:20:25,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:25,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:25,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110515003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:25,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:25,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:20:25,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360121634] [2022-01-18 15:20:25,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:25,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:20:25,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:20:25,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:20:25,346 INFO L87 Difference]: Start difference. First operand 799 states and 2692 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:25,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:25,921 INFO L93 Difference]: Finished difference Result 1215 states and 3942 transitions. [2022-01-18 15:20:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:20:25,921 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:25,923 INFO L225 Difference]: With dead ends: 1215 [2022-01-18 15:20:25,923 INFO L226 Difference]: Without dead ends: 1177 [2022-01-18 15:20:25,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:20:25,923 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 96 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:25,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 268 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 778 Invalid, 0 Unknown, 199 Unchecked, 0.3s Time] [2022-01-18 15:20:25,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2022-01-18 15:20:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 816. [2022-01-18 15:20:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.3680981595092025) internal successors, (2745), 815 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2745 transitions. [2022-01-18 15:20:25,933 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2745 transitions. Word has length 21 [2022-01-18 15:20:25,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:25,933 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 2745 transitions. [2022-01-18 15:20:25,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2745 transitions. [2022-01-18 15:20:25,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:25,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:25,935 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:25,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (636)] Ended with exit code 0 [2022-01-18 15:20:26,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2022-01-18 15:20:26,135 INFO L402 AbstractCegarLoop]: === Iteration 648 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:26,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:26,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1016730022, now seen corresponding path program 636 times [2022-01-18 15:20:26,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:26,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868441808] [2022-01-18 15:20:26,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:26,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:26,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:26,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868441808] [2022-01-18 15:20:26,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868441808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:26,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812420025] [2022-01-18 15:20:26,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:26,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:26,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:26,244 INFO L229 MonitoredProcess]: Starting monitored process 637 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:26,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (637)] Waiting until timeout for monitored process [2022-01-18 15:20:26,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:20:26,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:26,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:26,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:26,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:26,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:26,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:26,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:26,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:26,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:26,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:26,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:26,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:26,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812420025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:26,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:26,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:20:26,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623954269] [2022-01-18 15:20:26,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:26,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:26,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:26,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:26,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:26,609 INFO L87 Difference]: Start difference. First operand 816 states and 2745 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:27,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:27,098 INFO L93 Difference]: Finished difference Result 1185 states and 3839 transitions. [2022-01-18 15:20:27,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:20:27,099 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:27,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:27,100 INFO L225 Difference]: With dead ends: 1185 [2022-01-18 15:20:27,100 INFO L226 Difference]: Without dead ends: 1166 [2022-01-18 15:20:27,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:20:27,101 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 93 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:27,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 231 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2022-01-18 15:20:27,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 815. [2022-01-18 15:20:27,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.364864864864865) internal successors, (2739), 814 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2739 transitions. [2022-01-18 15:20:27,111 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2739 transitions. Word has length 21 [2022-01-18 15:20:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:27,111 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 2739 transitions. [2022-01-18 15:20:27,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:27,111 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2739 transitions. [2022-01-18 15:20:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:27,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:27,112 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:27,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (637)] Ended with exit code 0 [2022-01-18 15:20:27,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 637 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable647 [2022-01-18 15:20:27,313 INFO L402 AbstractCegarLoop]: === Iteration 649 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:27,313 INFO L85 PathProgramCache]: Analyzing trace with hash -301578352, now seen corresponding path program 637 times [2022-01-18 15:20:27,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:27,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610742574] [2022-01-18 15:20:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:27,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:27,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:27,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610742574] [2022-01-18 15:20:27,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610742574] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:27,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381687837] [2022-01-18 15:20:27,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:27,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:27,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:27,418 INFO L229 MonitoredProcess]: Starting monitored process 638 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:27,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (638)] Waiting until timeout for monitored process [2022-01-18 15:20:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:27,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:27,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:27,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:27,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:27,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:27,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:27,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:27,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:27,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:27,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:27,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:27,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381687837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:27,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:27,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:20:27,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180146836] [2022-01-18 15:20:27,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:27,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:27,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:27,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:27,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:27,785 INFO L87 Difference]: Start difference. First operand 815 states and 2739 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:28,243 INFO L93 Difference]: Finished difference Result 1083 states and 3537 transitions. [2022-01-18 15:20:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:20:28,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:28,245 INFO L225 Difference]: With dead ends: 1083 [2022-01-18 15:20:28,245 INFO L226 Difference]: Without dead ends: 1064 [2022-01-18 15:20:28,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:28,245 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:28,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 248 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:20:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2022-01-18 15:20:28,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 807. [2022-01-18 15:20:28,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.3535980148883375) internal successors, (2703), 806 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2703 transitions. [2022-01-18 15:20:28,255 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2703 transitions. Word has length 21 [2022-01-18 15:20:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:28,255 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 2703 transitions. [2022-01-18 15:20:28,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2703 transitions. [2022-01-18 15:20:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:28,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:28,256 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:28,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (638)] Ended with exit code 0 [2022-01-18 15:20:28,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648,638 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:28,456 INFO L402 AbstractCegarLoop]: === Iteration 650 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:28,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:28,456 INFO L85 PathProgramCache]: Analyzing trace with hash -224803302, now seen corresponding path program 638 times [2022-01-18 15:20:28,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:28,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682455465] [2022-01-18 15:20:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:28,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:28,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:28,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682455465] [2022-01-18 15:20:28,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682455465] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:28,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916409368] [2022-01-18 15:20:28,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:28,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:28,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:28,550 INFO L229 MonitoredProcess]: Starting monitored process 639 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:28,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (639)] Waiting until timeout for monitored process [2022-01-18 15:20:28,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:28,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:28,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:28,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:28,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:28,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:28,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:28,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:28,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:20:28,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:28,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:28,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:28,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:28,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916409368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:28,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:28,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-18 15:20:28,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101227620] [2022-01-18 15:20:28,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:28,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:20:28,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:28,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:20:28,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:28,863 INFO L87 Difference]: Start difference. First operand 807 states and 2703 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:29,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:29,259 INFO L93 Difference]: Finished difference Result 1164 states and 3792 transitions. [2022-01-18 15:20:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:20:29,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:29,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:29,261 INFO L225 Difference]: With dead ends: 1164 [2022-01-18 15:20:29,261 INFO L226 Difference]: Without dead ends: 1145 [2022-01-18 15:20:29,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:29,261 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 113 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:29,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 215 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-01-18 15:20:29,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 807. [2022-01-18 15:20:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.3535980148883375) internal successors, (2703), 806 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2703 transitions. [2022-01-18 15:20:29,271 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2703 transitions. Word has length 21 [2022-01-18 15:20:29,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:29,271 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 2703 transitions. [2022-01-18 15:20:29,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:29,272 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2703 transitions. [2022-01-18 15:20:29,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:29,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:29,273 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:29,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (639)] Ended with exit code 0 [2022-01-18 15:20:29,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,639 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:29,473 INFO L402 AbstractCegarLoop]: === Iteration 651 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:29,473 INFO L85 PathProgramCache]: Analyzing trace with hash 285713741, now seen corresponding path program 639 times [2022-01-18 15:20:29,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:29,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845247644] [2022-01-18 15:20:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:29,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:29,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:29,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845247644] [2022-01-18 15:20:29,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845247644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:29,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212320664] [2022-01-18 15:20:29,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:29,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:29,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:29,562 INFO L229 MonitoredProcess]: Starting monitored process 640 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:29,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (640)] Waiting until timeout for monitored process [2022-01-18 15:20:29,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:20:29,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:29,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:29,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:29,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:29,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:29,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:29,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:29,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:29,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:29,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:29,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:29,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:29,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:20:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:29,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212320664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:29,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:29,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-18 15:20:29,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953797456] [2022-01-18 15:20:29,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:29,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:20:29,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:29,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:20:29,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:20:29,896 INFO L87 Difference]: Start difference. First operand 807 states and 2703 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:30,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:30,608 INFO L93 Difference]: Finished difference Result 1683 states and 5201 transitions. [2022-01-18 15:20:30,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:20:30,608 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:30,611 INFO L225 Difference]: With dead ends: 1683 [2022-01-18 15:20:30,611 INFO L226 Difference]: Without dead ends: 1629 [2022-01-18 15:20:30,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:20:30,611 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 128 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:30,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 257 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2022-01-18 15:20:30,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 851. [2022-01-18 15:20:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.3894117647058826) internal successors, (2881), 850 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2881 transitions. [2022-01-18 15:20:30,624 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2881 transitions. Word has length 21 [2022-01-18 15:20:30,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:30,624 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 2881 transitions. [2022-01-18 15:20:30,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2881 transitions. [2022-01-18 15:20:30,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:30,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:30,625 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:30,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (640)] Ended with exit code 0 [2022-01-18 15:20:30,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2022-01-18 15:20:30,825 INFO L402 AbstractCegarLoop]: === Iteration 652 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:30,825 INFO L85 PathProgramCache]: Analyzing trace with hash -569842987, now seen corresponding path program 640 times [2022-01-18 15:20:30,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:30,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839557973] [2022-01-18 15:20:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:30,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:30,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:30,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839557973] [2022-01-18 15:20:30,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839557973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:30,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119694993] [2022-01-18 15:20:30,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:30,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:30,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:30,903 INFO L229 MonitoredProcess]: Starting monitored process 641 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:30,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (641)] Waiting until timeout for monitored process [2022-01-18 15:20:30,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:30,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:30,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:30,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:30,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:30,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:20:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:31,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:31,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:31,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:31,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:31,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:31,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:31,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:31,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119694993] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:31,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:31,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-18 15:20:31,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741222075] [2022-01-18 15:20:31,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:31,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:20:31,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:31,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:20:31,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:20:31,183 INFO L87 Difference]: Start difference. First operand 851 states and 2881 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:31,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:31,522 INFO L93 Difference]: Finished difference Result 1233 states and 3943 transitions. [2022-01-18 15:20:31,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:20:31,523 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:31,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:31,524 INFO L225 Difference]: With dead ends: 1233 [2022-01-18 15:20:31,524 INFO L226 Difference]: Without dead ends: 1139 [2022-01-18 15:20:31,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:31,525 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 94 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:31,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 242 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-01-18 15:20:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 845. [2022-01-18 15:20:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.3720379146919433) internal successors, (2846), 844 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:31,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2846 transitions. [2022-01-18 15:20:31,535 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2846 transitions. Word has length 21 [2022-01-18 15:20:31,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:31,535 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2846 transitions. [2022-01-18 15:20:31,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:31,535 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2846 transitions. [2022-01-18 15:20:31,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:31,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:31,536 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:31,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (641)] Ended with exit code 0 [2022-01-18 15:20:31,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2022-01-18 15:20:31,737 INFO L402 AbstractCegarLoop]: === Iteration 653 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:31,737 INFO L85 PathProgramCache]: Analyzing trace with hash 216211033, now seen corresponding path program 641 times [2022-01-18 15:20:31,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:31,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335294075] [2022-01-18 15:20:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:31,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:31,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:31,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335294075] [2022-01-18 15:20:31,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335294075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:31,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919880951] [2022-01-18 15:20:31,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:31,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:31,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:31,822 INFO L229 MonitoredProcess]: Starting monitored process 642 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:31,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (642)] Waiting until timeout for monitored process [2022-01-18 15:20:31,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:20:31,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:31,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:31,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:31,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:31,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:31,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:32,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:32,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:32,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:32,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:32,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:32,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:32,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919880951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:32,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:32,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-18 15:20:32,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794251053] [2022-01-18 15:20:32,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:32,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:20:32,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:32,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:20:32,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:32,225 INFO L87 Difference]: Start difference. First operand 845 states and 2846 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:33,655 INFO L93 Difference]: Finished difference Result 1984 states and 5988 transitions. [2022-01-18 15:20:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 15:20:33,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:33,658 INFO L225 Difference]: With dead ends: 1984 [2022-01-18 15:20:33,659 INFO L226 Difference]: Without dead ends: 1759 [2022-01-18 15:20:33,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=449, Invalid=2101, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 15:20:33,659 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 218 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:33,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 390 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1311 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:20:33,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-01-18 15:20:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 851. [2022-01-18 15:20:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.3741176470588234) internal successors, (2868), 850 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:33,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2868 transitions. [2022-01-18 15:20:33,681 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2868 transitions. Word has length 21 [2022-01-18 15:20:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:33,682 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 2868 transitions. [2022-01-18 15:20:33,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:33,682 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2868 transitions. [2022-01-18 15:20:33,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:33,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:33,683 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:33,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (642)] Ended with exit code 0 [2022-01-18 15:20:33,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2022-01-18 15:20:33,883 INFO L402 AbstractCegarLoop]: === Iteration 654 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:33,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:33,884 INFO L85 PathProgramCache]: Analyzing trace with hash -877880555, now seen corresponding path program 642 times [2022-01-18 15:20:33,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:33,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843574727] [2022-01-18 15:20:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:33,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:33,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:33,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843574727] [2022-01-18 15:20:33,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843574727] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:33,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484624854] [2022-01-18 15:20:33,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:33,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:33,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:33,961 INFO L229 MonitoredProcess]: Starting monitored process 643 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:33,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (643)] Waiting until timeout for monitored process [2022-01-18 15:20:33,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:20:33,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:33,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:33,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:34,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:34,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:34,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:34,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:34,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:34,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:34,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:34,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:34,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:20:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:34,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484624854] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:34,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:34,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-18 15:20:34,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96335174] [2022-01-18 15:20:34,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:34,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:20:34,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:34,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:20:34,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:20:34,270 INFO L87 Difference]: Start difference. First operand 851 states and 2868 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:34,813 INFO L93 Difference]: Finished difference Result 1688 states and 5194 transitions. [2022-01-18 15:20:34,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:20:34,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:34,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:34,816 INFO L225 Difference]: With dead ends: 1688 [2022-01-18 15:20:34,816 INFO L226 Difference]: Without dead ends: 1646 [2022-01-18 15:20:34,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:20:34,816 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 162 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:34,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 269 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:34,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-01-18 15:20:34,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 844. [2022-01-18 15:20:34,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.365361803084223) internal successors, (2837), 843 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2837 transitions. [2022-01-18 15:20:34,828 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2837 transitions. Word has length 21 [2022-01-18 15:20:34,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:34,828 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 2837 transitions. [2022-01-18 15:20:34,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:34,828 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2837 transitions. [2022-01-18 15:20:34,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:34,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:34,829 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:34,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (643)] Ended with exit code 0 [2022-01-18 15:20:35,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable653,643 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:35,030 INFO L402 AbstractCegarLoop]: === Iteration 655 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:35,030 INFO L85 PathProgramCache]: Analyzing trace with hash -624791622, now seen corresponding path program 643 times [2022-01-18 15:20:35,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:35,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714647613] [2022-01-18 15:20:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:35,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:35,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:35,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714647613] [2022-01-18 15:20:35,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714647613] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:35,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383256160] [2022-01-18 15:20:35,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:35,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:35,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:35,132 INFO L229 MonitoredProcess]: Starting monitored process 644 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:35,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (644)] Waiting until timeout for monitored process [2022-01-18 15:20:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:35,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:35,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:35,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:35,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:35,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:35,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:35,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:35,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:35,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:35,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:35,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:35,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:35,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383256160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:35,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:35,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-18 15:20:35,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534716817] [2022-01-18 15:20:35,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:35,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:20:35,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:35,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:20:35,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:35,512 INFO L87 Difference]: Start difference. First operand 844 states and 2837 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:36,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:36,073 INFO L93 Difference]: Finished difference Result 1407 states and 4547 transitions. [2022-01-18 15:20:36,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:20:36,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:36,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:36,075 INFO L225 Difference]: With dead ends: 1407 [2022-01-18 15:20:36,075 INFO L226 Difference]: Without dead ends: 1384 [2022-01-18 15:20:36,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:20:36,076 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 102 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:36,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 287 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:20:36,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-01-18 15:20:36,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 862. [2022-01-18 15:20:36,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.3716608594657376) internal successors, (2903), 861 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2903 transitions. [2022-01-18 15:20:36,087 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2903 transitions. Word has length 21 [2022-01-18 15:20:36,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:36,087 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 2903 transitions. [2022-01-18 15:20:36,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:36,087 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2903 transitions. [2022-01-18 15:20:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:36,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:36,088 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:36,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (644)] Ended with exit code 0 [2022-01-18 15:20:36,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 644 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2022-01-18 15:20:36,289 INFO L402 AbstractCegarLoop]: === Iteration 656 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:36,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:36,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2068905569, now seen corresponding path program 644 times [2022-01-18 15:20:36,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:36,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682440432] [2022-01-18 15:20:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:36,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:36,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:36,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682440432] [2022-01-18 15:20:36,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682440432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:36,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594276736] [2022-01-18 15:20:36,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:36,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:36,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:36,405 INFO L229 MonitoredProcess]: Starting monitored process 645 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:36,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (645)] Waiting until timeout for monitored process [2022-01-18 15:20:36,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:36,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:36,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:36,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:36,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:36,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:36,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:36,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:36,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:36,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:36,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:36,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:36,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:36,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:20:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:36,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594276736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:36,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:36,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:20:36,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919482408] [2022-01-18 15:20:36,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:36,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:36,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:36,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:36,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:36,793 INFO L87 Difference]: Start difference. First operand 862 states and 2903 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:37,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:37,358 INFO L93 Difference]: Finished difference Result 1393 states and 4466 transitions. [2022-01-18 15:20:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:20:37,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:37,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:37,361 INFO L225 Difference]: With dead ends: 1393 [2022-01-18 15:20:37,361 INFO L226 Difference]: Without dead ends: 1372 [2022-01-18 15:20:37,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:20:37,361 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 99 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:37,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 302 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:20:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2022-01-18 15:20:37,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 857. [2022-01-18 15:20:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.3679906542056073) internal successors, (2883), 856 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:37,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2883 transitions. [2022-01-18 15:20:37,372 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2883 transitions. Word has length 21 [2022-01-18 15:20:37,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:37,372 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 2883 transitions. [2022-01-18 15:20:37,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:37,373 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2883 transitions. [2022-01-18 15:20:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:37,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:37,374 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:37,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (645)] Ended with exit code 0 [2022-01-18 15:20:37,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2022-01-18 15:20:37,574 INFO L402 AbstractCegarLoop]: === Iteration 657 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:37,574 INFO L85 PathProgramCache]: Analyzing trace with hash -521281468, now seen corresponding path program 645 times [2022-01-18 15:20:37,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:37,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654435536] [2022-01-18 15:20:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:37,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:37,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:37,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654435536] [2022-01-18 15:20:37,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654435536] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:37,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657842722] [2022-01-18 15:20:37,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:37,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:37,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:37,670 INFO L229 MonitoredProcess]: Starting monitored process 646 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:37,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (646)] Waiting until timeout for monitored process [2022-01-18 15:20:37,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:20:37,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:37,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:37,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:37,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:37,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:37,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:37,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:37,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:38,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:38,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:38,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:38,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:38,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657842722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:38,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:38,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:20:38,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222357776] [2022-01-18 15:20:38,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:38,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:38,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:38,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:38,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:38,043 INFO L87 Difference]: Start difference. First operand 857 states and 2883 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:38,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:38,468 INFO L93 Difference]: Finished difference Result 1313 states and 4276 transitions. [2022-01-18 15:20:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:20:38,468 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:38,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:38,470 INFO L225 Difference]: With dead ends: 1313 [2022-01-18 15:20:38,470 INFO L226 Difference]: Without dead ends: 1294 [2022-01-18 15:20:38,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:20:38,470 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 79 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:38,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 242 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:38,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-01-18 15:20:38,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 855. [2022-01-18 15:20:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.370023419203747) internal successors, (2878), 854 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2878 transitions. [2022-01-18 15:20:38,483 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2878 transitions. Word has length 21 [2022-01-18 15:20:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:38,484 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 2878 transitions. [2022-01-18 15:20:38,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2878 transitions. [2022-01-18 15:20:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:38,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:38,485 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:38,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (646)] Ended with exit code 0 [2022-01-18 15:20:38,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable656 [2022-01-18 15:20:38,685 INFO L402 AbstractCegarLoop]: === Iteration 658 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:38,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:38,685 INFO L85 PathProgramCache]: Analyzing trace with hash 963807858, now seen corresponding path program 646 times [2022-01-18 15:20:38,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:38,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237792108] [2022-01-18 15:20:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:38,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:38,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:38,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237792108] [2022-01-18 15:20:38,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237792108] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:38,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438460306] [2022-01-18 15:20:38,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:38,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:38,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:38,795 INFO L229 MonitoredProcess]: Starting monitored process 647 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:38,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (647)] Waiting until timeout for monitored process [2022-01-18 15:20:38,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:38,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:38,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:38,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:38,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:38,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:38,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:39,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:39,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:20:39,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:39,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:39,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:39,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:39,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438460306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:39,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:39,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:20:39,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646270801] [2022-01-18 15:20:39,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:39,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:39,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:39,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:39,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:39,145 INFO L87 Difference]: Start difference. First operand 855 states and 2878 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:39,672 INFO L93 Difference]: Finished difference Result 1431 states and 4639 transitions. [2022-01-18 15:20:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:20:39,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:39,674 INFO L225 Difference]: With dead ends: 1431 [2022-01-18 15:20:39,674 INFO L226 Difference]: Without dead ends: 1412 [2022-01-18 15:20:39,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:20:39,675 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 104 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:39,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 309 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:20:39,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-01-18 15:20:39,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 839. [2022-01-18 15:20:39,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.3615751789976134) internal successors, (2817), 838 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2817 transitions. [2022-01-18 15:20:39,686 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2817 transitions. Word has length 21 [2022-01-18 15:20:39,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:39,686 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 2817 transitions. [2022-01-18 15:20:39,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:39,686 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2817 transitions. [2022-01-18 15:20:39,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:39,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:39,687 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:39,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (647)] Ended with exit code 0 [2022-01-18 15:20:39,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,647 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:39,888 INFO L402 AbstractCegarLoop]: === Iteration 659 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:39,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:39,888 INFO L85 PathProgramCache]: Analyzing trace with hash 167736712, now seen corresponding path program 647 times [2022-01-18 15:20:39,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:39,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297626213] [2022-01-18 15:20:39,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:39,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:39,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:39,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297626213] [2022-01-18 15:20:39,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297626213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:39,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609264907] [2022-01-18 15:20:39,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:39,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:39,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:39,998 INFO L229 MonitoredProcess]: Starting monitored process 648 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:39,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (648)] Waiting until timeout for monitored process [2022-01-18 15:20:40,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:20:40,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:40,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:40,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:40,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:40,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-01-18 15:20:40,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-01-18 15:20:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:40,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:40,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:40,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:40,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:40,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:40,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:40,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:40,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609264907] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:40,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:40,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:40,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089410062] [2022-01-18 15:20:40,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:40,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:40,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:40,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:40,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:40,555 INFO L87 Difference]: Start difference. First operand 839 states and 2817 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:41,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:41,135 INFO L93 Difference]: Finished difference Result 1181 states and 3818 transitions. [2022-01-18 15:20:41,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:20:41,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:41,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:41,137 INFO L225 Difference]: With dead ends: 1181 [2022-01-18 15:20:41,137 INFO L226 Difference]: Without dead ends: 1127 [2022-01-18 15:20:41,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:20:41,138 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 105 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:41,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 218 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:41,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-01-18 15:20:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 839. [2022-01-18 15:20:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.356801909307876) internal successors, (2813), 838 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2813 transitions. [2022-01-18 15:20:41,148 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2813 transitions. Word has length 21 [2022-01-18 15:20:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:41,148 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 2813 transitions. [2022-01-18 15:20:41,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:41,148 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2813 transitions. [2022-01-18 15:20:41,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:41,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:41,149 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:41,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (648)] Ended with exit code 0 [2022-01-18 15:20:41,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,648 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:41,349 INFO L402 AbstractCegarLoop]: === Iteration 660 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:41,350 INFO L85 PathProgramCache]: Analyzing trace with hash 770977709, now seen corresponding path program 648 times [2022-01-18 15:20:41,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:41,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794938291] [2022-01-18 15:20:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:41,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:41,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:41,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794938291] [2022-01-18 15:20:41,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794938291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:41,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659575224] [2022-01-18 15:20:41,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:41,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:41,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:41,466 INFO L229 MonitoredProcess]: Starting monitored process 649 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:41,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (649)] Waiting until timeout for monitored process [2022-01-18 15:20:41,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:20:41,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:41,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:41,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:41,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:41,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:41,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:41,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:41,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:41,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:41,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:41,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:41,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:41,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:41,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:41,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:41,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:41,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659575224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:41,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:41,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:41,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590817304] [2022-01-18 15:20:41,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:41,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:41,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:41,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:41,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:41,998 INFO L87 Difference]: Start difference. First operand 839 states and 2813 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:42,524 INFO L93 Difference]: Finished difference Result 1292 states and 4146 transitions. [2022-01-18 15:20:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:20:42,525 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:42,527 INFO L225 Difference]: With dead ends: 1292 [2022-01-18 15:20:42,527 INFO L226 Difference]: Without dead ends: 1265 [2022-01-18 15:20:42,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:20:42,527 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 91 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:42,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 273 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 717 Invalid, 0 Unknown, 256 Unchecked, 0.3s Time] [2022-01-18 15:20:42,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-01-18 15:20:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 841. [2022-01-18 15:20:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.354761904761905) internal successors, (2818), 840 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:42,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2818 transitions. [2022-01-18 15:20:42,538 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2818 transitions. Word has length 21 [2022-01-18 15:20:42,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:42,538 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2818 transitions. [2022-01-18 15:20:42,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:42,538 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2818 transitions. [2022-01-18 15:20:42,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:42,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:42,539 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:42,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (649)] Ended with exit code 0 [2022-01-18 15:20:42,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,649 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:42,740 INFO L402 AbstractCegarLoop]: === Iteration 661 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash -227085491, now seen corresponding path program 649 times [2022-01-18 15:20:42,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:42,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371170478] [2022-01-18 15:20:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:42,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:42,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:42,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371170478] [2022-01-18 15:20:42,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371170478] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:42,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081736660] [2022-01-18 15:20:42,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:42,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:42,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:42,840 INFO L229 MonitoredProcess]: Starting monitored process 650 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:42,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (650)] Waiting until timeout for monitored process [2022-01-18 15:20:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:42,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:42,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:42,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:42,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:43,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:43,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:43,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:43,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:20:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:43,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:43,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:43,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:43,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:43,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:43,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:43,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:43,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081736660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:43,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:43,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:43,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291285512] [2022-01-18 15:20:43,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:43,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:43,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:43,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:43,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:43,354 INFO L87 Difference]: Start difference. First operand 841 states and 2818 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:43,741 INFO L93 Difference]: Finished difference Result 1148 states and 3747 transitions. [2022-01-18 15:20:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:20:43,741 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:43,743 INFO L225 Difference]: With dead ends: 1148 [2022-01-18 15:20:43,743 INFO L226 Difference]: Without dead ends: 1127 [2022-01-18 15:20:43,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:20:43,743 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:43,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 186 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 497 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2022-01-18 15:20:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-01-18 15:20:43,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 848. [2022-01-18 15:20:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.35655253837072) internal successors, (2843), 847 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2843 transitions. [2022-01-18 15:20:43,753 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2843 transitions. Word has length 21 [2022-01-18 15:20:43,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:43,753 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 2843 transitions. [2022-01-18 15:20:43,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2843 transitions. [2022-01-18 15:20:43,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:43,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:43,754 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:43,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (650)] Ended with exit code 0 [2022-01-18 15:20:43,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,650 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:43,955 INFO L402 AbstractCegarLoop]: === Iteration 662 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:43,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:43,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1003969747, now seen corresponding path program 650 times [2022-01-18 15:20:43,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:43,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981701770] [2022-01-18 15:20:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:43,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:44,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:44,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981701770] [2022-01-18 15:20:44,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981701770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:44,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911035269] [2022-01-18 15:20:44,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:44,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:44,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:44,068 INFO L229 MonitoredProcess]: Starting monitored process 651 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:44,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (651)] Waiting until timeout for monitored process [2022-01-18 15:20:44,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:44,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:44,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:44,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:44,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:44,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:44,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:44,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:44,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:44,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:44,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:44,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:44,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:44,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911035269] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:44,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:44,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:44,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862927535] [2022-01-18 15:20:44,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:44,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:44,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:44,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:44,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:44,492 INFO L87 Difference]: Start difference. First operand 848 states and 2843 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:45,152 INFO L93 Difference]: Finished difference Result 1216 states and 3937 transitions. [2022-01-18 15:20:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:20:45,152 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:45,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:45,154 INFO L225 Difference]: With dead ends: 1216 [2022-01-18 15:20:45,154 INFO L226 Difference]: Without dead ends: 1195 [2022-01-18 15:20:45,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:20:45,154 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 94 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:45,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 262 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:20:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-01-18 15:20:45,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 848. [2022-01-18 15:20:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.3636363636363638) internal successors, (2849), 847 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:45,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2849 transitions. [2022-01-18 15:20:45,165 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2849 transitions. Word has length 21 [2022-01-18 15:20:45,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:45,165 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 2849 transitions. [2022-01-18 15:20:45,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:45,165 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2849 transitions. [2022-01-18 15:20:45,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:45,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:45,166 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:45,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (651)] Ended with exit code 0 [2022-01-18 15:20:45,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2022-01-18 15:20:45,366 INFO L402 AbstractCegarLoop]: === Iteration 663 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:45,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:45,367 INFO L85 PathProgramCache]: Analyzing trace with hash -577370223, now seen corresponding path program 651 times [2022-01-18 15:20:45,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:45,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559141566] [2022-01-18 15:20:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:45,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:45,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:45,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559141566] [2022-01-18 15:20:45,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559141566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:45,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384809547] [2022-01-18 15:20:45,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:45,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:45,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:45,462 INFO L229 MonitoredProcess]: Starting monitored process 652 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:45,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (652)] Waiting until timeout for monitored process [2022-01-18 15:20:45,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:20:45,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:45,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:45,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:45,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:45,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:45,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:45,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:45,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:45,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:45,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:45,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:45,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:45,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384809547] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:45,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:45,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:20:45,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451592378] [2022-01-18 15:20:45,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:45,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:20:45,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:45,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:20:45,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:45,795 INFO L87 Difference]: Start difference. First operand 848 states and 2849 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:46,019 INFO L93 Difference]: Finished difference Result 950 states and 3141 transitions. [2022-01-18 15:20:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:46,019 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:46,020 INFO L225 Difference]: With dead ends: 950 [2022-01-18 15:20:46,021 INFO L226 Difference]: Without dead ends: 928 [2022-01-18 15:20:46,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:46,021 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:46,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 146 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:46,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-01-18 15:20:46,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 846. [2022-01-18 15:20:46,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 3.365680473372781) internal successors, (2844), 845 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2844 transitions. [2022-01-18 15:20:46,030 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2844 transitions. Word has length 21 [2022-01-18 15:20:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:46,030 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 2844 transitions. [2022-01-18 15:20:46,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2844 transitions. [2022-01-18 15:20:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:46,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:46,031 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:46,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (652)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:46,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable662,652 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:46,232 INFO L402 AbstractCegarLoop]: === Iteration 664 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:46,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:46,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1467150924, now seen corresponding path program 652 times [2022-01-18 15:20:46,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:46,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078623737] [2022-01-18 15:20:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:46,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:46,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:46,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078623737] [2022-01-18 15:20:46,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078623737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:46,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788381102] [2022-01-18 15:20:46,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:46,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:46,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:46,349 INFO L229 MonitoredProcess]: Starting monitored process 653 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:46,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (653)] Waiting until timeout for monitored process [2022-01-18 15:20:46,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:46,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:46,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:46,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:46,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:46,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:46,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:46,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:46,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:46,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:46,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:46,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:46,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:20:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:46,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788381102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:46,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:46,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:46,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045004176] [2022-01-18 15:20:46,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:46,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:46,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:46,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:46,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:46,766 INFO L87 Difference]: Start difference. First operand 846 states and 2844 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:47,271 INFO L93 Difference]: Finished difference Result 1118 states and 3644 transitions. [2022-01-18 15:20:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:20:47,271 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:47,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:47,272 INFO L225 Difference]: With dead ends: 1118 [2022-01-18 15:20:47,272 INFO L226 Difference]: Without dead ends: 1095 [2022-01-18 15:20:47,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:20:47,273 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:47,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 208 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:20:47,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2022-01-18 15:20:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 846. [2022-01-18 15:20:47,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 3.365680473372781) internal successors, (2844), 845 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2844 transitions. [2022-01-18 15:20:47,282 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2844 transitions. Word has length 21 [2022-01-18 15:20:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:47,283 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 2844 transitions. [2022-01-18 15:20:47,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2844 transitions. [2022-01-18 15:20:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:47,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:47,284 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:47,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (653)] Ended with exit code 0 [2022-01-18 15:20:47,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 653 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2022-01-18 15:20:47,484 INFO L402 AbstractCegarLoop]: === Iteration 665 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2070391921, now seen corresponding path program 653 times [2022-01-18 15:20:47,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:47,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632362316] [2022-01-18 15:20:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:47,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:47,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:47,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632362316] [2022-01-18 15:20:47,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632362316] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:47,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237817142] [2022-01-18 15:20:47,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:47,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:47,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:47,589 INFO L229 MonitoredProcess]: Starting monitored process 654 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:47,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (654)] Waiting until timeout for monitored process [2022-01-18 15:20:47,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:20:47,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:47,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:20:47,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:47,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:47,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:47,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:47,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:47,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:47,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:47,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:48,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:48,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:48,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:48,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:20:48,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:48,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:48,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237817142] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:48,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:48,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-01-18 15:20:48,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193887288] [2022-01-18 15:20:48,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:48,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:20:48,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:20:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:20:48,254 INFO L87 Difference]: Start difference. First operand 846 states and 2844 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:48,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:48,902 INFO L93 Difference]: Finished difference Result 1267 states and 4089 transitions. [2022-01-18 15:20:48,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:20:48,903 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:48,905 INFO L225 Difference]: With dead ends: 1267 [2022-01-18 15:20:48,905 INFO L226 Difference]: Without dead ends: 1219 [2022-01-18 15:20:48,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:20:48,905 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 83 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:48,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 297 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 747 Invalid, 0 Unknown, 266 Unchecked, 0.3s Time] [2022-01-18 15:20:48,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-01-18 15:20:48,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 851. [2022-01-18 15:20:48,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.375294117647059) internal successors, (2869), 850 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:48,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2869 transitions. [2022-01-18 15:20:48,916 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2869 transitions. Word has length 21 [2022-01-18 15:20:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:48,916 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 2869 transitions. [2022-01-18 15:20:48,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:48,916 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2869 transitions. [2022-01-18 15:20:48,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:48,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:48,917 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:48,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (654)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:49,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 654 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2022-01-18 15:20:49,117 INFO L402 AbstractCegarLoop]: === Iteration 666 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:49,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:49,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1069965985, now seen corresponding path program 654 times [2022-01-18 15:20:49,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:49,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742941237] [2022-01-18 15:20:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:49,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:49,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:49,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742941237] [2022-01-18 15:20:49,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742941237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:49,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076807352] [2022-01-18 15:20:49,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:49,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:49,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:49,213 INFO L229 MonitoredProcess]: Starting monitored process 655 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:49,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (655)] Waiting until timeout for monitored process [2022-01-18 15:20:49,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:20:49,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:49,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:49,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:49,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:49,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:49,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:49,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:49,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:49,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:49,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:49,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:49,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:49,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:49,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076807352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:49,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:49,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:20:49,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951419756] [2022-01-18 15:20:49,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:49,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:20:49,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:49,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:20:49,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:49,560 INFO L87 Difference]: Start difference. First operand 851 states and 2869 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:49,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:49,782 INFO L93 Difference]: Finished difference Result 1015 states and 3361 transitions. [2022-01-18 15:20:49,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:49,782 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:49,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:49,784 INFO L225 Difference]: With dead ends: 1015 [2022-01-18 15:20:49,784 INFO L226 Difference]: Without dead ends: 980 [2022-01-18 15:20:49,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:49,784 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:49,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 157 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:49,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-01-18 15:20:49,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 852. [2022-01-18 15:20:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.3783783783783785) internal successors, (2875), 851 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2875 transitions. [2022-01-18 15:20:49,793 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2875 transitions. Word has length 21 [2022-01-18 15:20:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:49,793 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2875 transitions. [2022-01-18 15:20:49,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2875 transitions. [2022-01-18 15:20:49,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:49,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:49,795 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:49,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (655)] Ended with exit code 0 [2022-01-18 15:20:49,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 655 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2022-01-18 15:20:49,995 INFO L402 AbstractCegarLoop]: === Iteration 667 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:49,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:49,995 INFO L85 PathProgramCache]: Analyzing trace with hash 596241805, now seen corresponding path program 655 times [2022-01-18 15:20:49,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:49,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136637701] [2022-01-18 15:20:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:49,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:50,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:50,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136637701] [2022-01-18 15:20:50,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136637701] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:50,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187023510] [2022-01-18 15:20:50,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:50,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:50,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:50,096 INFO L229 MonitoredProcess]: Starting monitored process 656 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:50,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (656)] Waiting until timeout for monitored process [2022-01-18 15:20:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:50,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:50,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:50,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:50,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:50,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:50,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:50,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:50,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:20:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:50,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:50,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:50,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:50,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:50,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:50,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:50,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:50,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187023510] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:50,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:50,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:20:50,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301339351] [2022-01-18 15:20:50,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:50,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:50,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:50,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:50,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:50,562 INFO L87 Difference]: Start difference. First operand 852 states and 2875 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:50,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:50,797 INFO L93 Difference]: Finished difference Result 1103 states and 3636 transitions. [2022-01-18 15:20:50,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:20:50,797 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:50,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:50,799 INFO L225 Difference]: With dead ends: 1103 [2022-01-18 15:20:50,799 INFO L226 Difference]: Without dead ends: 1082 [2022-01-18 15:20:50,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:20:50,799 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:50,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 131 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 407 Invalid, 0 Unknown, 110 Unchecked, 0.2s Time] [2022-01-18 15:20:50,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-01-18 15:20:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 853. [2022-01-18 15:20:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.380281690140845) internal successors, (2880), 852 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2880 transitions. [2022-01-18 15:20:50,809 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2880 transitions. Word has length 21 [2022-01-18 15:20:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:50,809 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2880 transitions. [2022-01-18 15:20:50,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2880 transitions. [2022-01-18 15:20:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:50,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:50,810 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:50,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (656)] Ended with exit code 0 [2022-01-18 15:20:51,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666,656 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:51,011 INFO L402 AbstractCegarLoop]: === Iteration 668 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:51,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:51,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2110802993, now seen corresponding path program 656 times [2022-01-18 15:20:51,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:51,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602677951] [2022-01-18 15:20:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:51,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:51,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:51,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602677951] [2022-01-18 15:20:51,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602677951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:51,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383748743] [2022-01-18 15:20:51,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:51,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:51,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:51,138 INFO L229 MonitoredProcess]: Starting monitored process 657 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:51,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (657)] Waiting until timeout for monitored process [2022-01-18 15:20:51,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:51,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:51,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:51,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:51,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:51,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:51,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:51,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:51,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:51,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-18 15:20:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:51,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:51,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:51,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:20:51,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:51,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:51,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:51,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:51,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383748743] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:51,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:51,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-18 15:20:51,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738172531] [2022-01-18 15:20:51,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:51,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:20:51,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:20:51,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:20:51,638 INFO L87 Difference]: Start difference. First operand 853 states and 2880 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:52,026 INFO L93 Difference]: Finished difference Result 1173 states and 3836 transitions. [2022-01-18 15:20:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:20:52,027 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:52,028 INFO L225 Difference]: With dead ends: 1173 [2022-01-18 15:20:52,028 INFO L226 Difference]: Without dead ends: 1152 [2022-01-18 15:20:52,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:20:52,029 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 87 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:52,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 165 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 447 Invalid, 0 Unknown, 144 Unchecked, 0.2s Time] [2022-01-18 15:20:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-01-18 15:20:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 852. [2022-01-18 15:20:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.3783783783783785) internal successors, (2875), 851 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2875 transitions. [2022-01-18 15:20:52,039 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2875 transitions. Word has length 21 [2022-01-18 15:20:52,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:52,039 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2875 transitions. [2022-01-18 15:20:52,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:52,039 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2875 transitions. [2022-01-18 15:20:52,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:52,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:52,040 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:52,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (657)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:52,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2022-01-18 15:20:52,240 INFO L402 AbstractCegarLoop]: === Iteration 669 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:52,240 INFO L85 PathProgramCache]: Analyzing trace with hash -918415810, now seen corresponding path program 657 times [2022-01-18 15:20:52,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:52,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836048218] [2022-01-18 15:20:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:52,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:52,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:52,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836048218] [2022-01-18 15:20:52,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836048218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:52,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165077087] [2022-01-18 15:20:52,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:52,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:52,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:52,350 INFO L229 MonitoredProcess]: Starting monitored process 658 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:52,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (658)] Waiting until timeout for monitored process [2022-01-18 15:20:52,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:20:52,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:52,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:52,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:52,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:52,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:52,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:52,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:52,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:52,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:20:52,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:52,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:52,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:52,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:20:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:52,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165077087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:52,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:52,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:52,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116853313] [2022-01-18 15:20:52,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:52,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:52,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:52,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:52,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:52,756 INFO L87 Difference]: Start difference. First operand 852 states and 2875 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:53,209 INFO L93 Difference]: Finished difference Result 1154 states and 3762 transitions. [2022-01-18 15:20:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:20:53,209 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:53,210 INFO L225 Difference]: With dead ends: 1154 [2022-01-18 15:20:53,210 INFO L226 Difference]: Without dead ends: 1131 [2022-01-18 15:20:53,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:20:53,211 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 109 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:53,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 163 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-01-18 15:20:53,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 861. [2022-01-18 15:20:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.3883720930232557) internal successors, (2914), 860 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:53,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2914 transitions. [2022-01-18 15:20:53,221 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2914 transitions. Word has length 21 [2022-01-18 15:20:53,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:53,221 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 2914 transitions. [2022-01-18 15:20:53,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:53,221 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2914 transitions. [2022-01-18 15:20:53,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:53,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:53,222 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:53,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (658)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:53,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable668 [2022-01-18 15:20:53,423 INFO L402 AbstractCegarLoop]: === Iteration 670 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:53,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:53,423 INFO L85 PathProgramCache]: Analyzing trace with hash -315174813, now seen corresponding path program 658 times [2022-01-18 15:20:53,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:53,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844553564] [2022-01-18 15:20:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:53,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:53,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:53,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844553564] [2022-01-18 15:20:53,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844553564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:53,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167896489] [2022-01-18 15:20:53,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:20:53,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:53,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:53,529 INFO L229 MonitoredProcess]: Starting monitored process 659 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:53,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (659)] Waiting until timeout for monitored process [2022-01-18 15:20:53,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:20:53,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:53,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:53,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:53,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:53,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:53,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:53,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:53,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:53,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:53,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:53,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:53,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:53,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:53,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:53,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:53,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167896489] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:53,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:53,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:20:53,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692511360] [2022-01-18 15:20:53,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:53,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:53,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:53,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:53,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:53,947 INFO L87 Difference]: Start difference. First operand 861 states and 2914 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:54,418 INFO L93 Difference]: Finished difference Result 1157 states and 3786 transitions. [2022-01-18 15:20:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:20:54,418 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:54,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:54,420 INFO L225 Difference]: With dead ends: 1157 [2022-01-18 15:20:54,420 INFO L226 Difference]: Without dead ends: 1130 [2022-01-18 15:20:54,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:20:54,421 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:54,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 198 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 743 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-01-18 15:20:54,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-01-18 15:20:54,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 867. [2022-01-18 15:20:54,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.4006928406466512) internal successors, (2945), 866 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2945 transitions. [2022-01-18 15:20:54,431 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2945 transitions. Word has length 21 [2022-01-18 15:20:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:54,431 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 2945 transitions. [2022-01-18 15:20:54,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2945 transitions. [2022-01-18 15:20:54,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:54,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:54,432 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:54,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (659)] Ended with exit code 0 [2022-01-18 15:20:54,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,659 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:54,633 INFO L402 AbstractCegarLoop]: === Iteration 671 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:54,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:54,633 INFO L85 PathProgramCache]: Analyzing trace with hash 839434577, now seen corresponding path program 659 times [2022-01-18 15:20:54,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:54,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546416856] [2022-01-18 15:20:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:54,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:54,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:54,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546416856] [2022-01-18 15:20:54,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546416856] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:54,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520309593] [2022-01-18 15:20:54,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:20:54,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:54,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:54,729 INFO L229 MonitoredProcess]: Starting monitored process 660 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:54,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (660)] Waiting until timeout for monitored process [2022-01-18 15:20:54,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:20:54,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:54,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:54,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:54,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:54,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:20:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:54,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:54,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:54,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:55,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:55,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:55,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:55,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:55,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520309593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:55,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:55,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-18 15:20:55,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456485889] [2022-01-18 15:20:55,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:55,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:20:55,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:55,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:20:55,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:55,066 INFO L87 Difference]: Start difference. First operand 867 states and 2945 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:55,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:55,310 INFO L93 Difference]: Finished difference Result 983 states and 3276 transitions. [2022-01-18 15:20:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:20:55,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:55,311 INFO L225 Difference]: With dead ends: 983 [2022-01-18 15:20:55,311 INFO L226 Difference]: Without dead ends: 947 [2022-01-18 15:20:55,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:20:55,312 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:55,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 181 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:55,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-01-18 15:20:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 866. [2022-01-18 15:20:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.3953757225433527) internal successors, (2937), 865 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2937 transitions. [2022-01-18 15:20:55,321 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2937 transitions. Word has length 21 [2022-01-18 15:20:55,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:55,321 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 2937 transitions. [2022-01-18 15:20:55,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:55,321 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2937 transitions. [2022-01-18 15:20:55,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:55,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:55,322 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:55,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (660)] Ended with exit code 0 [2022-01-18 15:20:55,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,660 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:55,523 INFO L402 AbstractCegarLoop]: === Iteration 672 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:55,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:55,523 INFO L85 PathProgramCache]: Analyzing trace with hash -814905656, now seen corresponding path program 660 times [2022-01-18 15:20:55,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:55,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270410266] [2022-01-18 15:20:55,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:55,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:55,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:55,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270410266] [2022-01-18 15:20:55,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270410266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:55,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519429357] [2022-01-18 15:20:55,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:20:55,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:55,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:55,616 INFO L229 MonitoredProcess]: Starting monitored process 661 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:55,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (661)] Waiting until timeout for monitored process [2022-01-18 15:20:55,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:20:55,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:55,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:55,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:55,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:55,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:55,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:55,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:55,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:55,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:55,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:55,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:55,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:20:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:55,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519429357] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:55,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:55,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:20:55,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208229773] [2022-01-18 15:20:55,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:55,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:20:55,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:55,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:20:55,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:20:55,981 INFO L87 Difference]: Start difference. First operand 866 states and 2937 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:56,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:56,317 INFO L93 Difference]: Finished difference Result 1060 states and 3502 transitions. [2022-01-18 15:20:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:20:56,317 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:56,319 INFO L225 Difference]: With dead ends: 1060 [2022-01-18 15:20:56,319 INFO L226 Difference]: Without dead ends: 1041 [2022-01-18 15:20:56,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:20:56,319 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:56,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 169 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:20:56,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-01-18 15:20:56,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 858. [2022-01-18 15:20:56,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.3897316219369893) internal successors, (2905), 857 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2905 transitions. [2022-01-18 15:20:56,329 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2905 transitions. Word has length 21 [2022-01-18 15:20:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:56,329 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 2905 transitions. [2022-01-18 15:20:56,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:56,329 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2905 transitions. [2022-01-18 15:20:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:56,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:56,330 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:56,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (661)] Ended with exit code 0 [2022-01-18 15:20:56,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,661 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:56,531 INFO L402 AbstractCegarLoop]: === Iteration 673 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:56,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash -308554161, now seen corresponding path program 661 times [2022-01-18 15:20:56,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:56,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682570552] [2022-01-18 15:20:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:56,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:56,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:56,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682570552] [2022-01-18 15:20:56,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682570552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:56,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912134859] [2022-01-18 15:20:56,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:20:56,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:56,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:56,635 INFO L229 MonitoredProcess]: Starting monitored process 662 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:56,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (662)] Waiting until timeout for monitored process [2022-01-18 15:20:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:56,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:56,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:56,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:56,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:56,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:56,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:56,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:56,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:57,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:57,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:57,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:57,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:57,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:57,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:57,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912134859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:57,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:57,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:20:57,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444805125] [2022-01-18 15:20:57,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:57,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:57,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:57,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:57,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:57,105 INFO L87 Difference]: Start difference. First operand 858 states and 2905 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:57,649 INFO L93 Difference]: Finished difference Result 1188 states and 3836 transitions. [2022-01-18 15:20:57,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:20:57,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:57,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:57,651 INFO L225 Difference]: With dead ends: 1188 [2022-01-18 15:20:57,651 INFO L226 Difference]: Without dead ends: 1161 [2022-01-18 15:20:57,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:20:57,651 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 92 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:57,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 244 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 839 Invalid, 0 Unknown, 7 Unchecked, 0.3s Time] [2022-01-18 15:20:57,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-01-18 15:20:57,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 862. [2022-01-18 15:20:57,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.3902439024390243) internal successors, (2919), 861 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2919 transitions. [2022-01-18 15:20:57,661 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2919 transitions. Word has length 21 [2022-01-18 15:20:57,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:57,661 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 2919 transitions. [2022-01-18 15:20:57,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2919 transitions. [2022-01-18 15:20:57,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:57,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:57,663 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:57,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (662)] Ended with exit code 0 [2022-01-18 15:20:57,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672,662 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:57,863 INFO L402 AbstractCegarLoop]: === Iteration 674 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:57,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:57,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1577875379, now seen corresponding path program 662 times [2022-01-18 15:20:57,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:57,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170509477] [2022-01-18 15:20:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:57,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:57,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:57,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170509477] [2022-01-18 15:20:57,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170509477] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:57,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073384719] [2022-01-18 15:20:57,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:20:57,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:57,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:57,968 INFO L229 MonitoredProcess]: Starting monitored process 663 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:57,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (663)] Waiting until timeout for monitored process [2022-01-18 15:20:57,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:20:57,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:57,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:57,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:58,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:58,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:58,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:20:58,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:20:58,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:20:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:58,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:58,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:58,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:20:58,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:58,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:58,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:58,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:58,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073384719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:58,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:58,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-18 15:20:58,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867998984] [2022-01-18 15:20:58,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:58,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:20:58,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:58,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:20:58,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:20:58,465 INFO L87 Difference]: Start difference. First operand 862 states and 2919 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:58,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:20:58,944 INFO L93 Difference]: Finished difference Result 1185 states and 3811 transitions. [2022-01-18 15:20:58,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:20:58,944 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:20:58,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:20:58,946 INFO L225 Difference]: With dead ends: 1185 [2022-01-18 15:20:58,946 INFO L226 Difference]: Without dead ends: 1174 [2022-01-18 15:20:58,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:20:58,946 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 118 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:20:58,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 209 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 652 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-01-18 15:20:58,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-01-18 15:20:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 864. [2022-01-18 15:20:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.388180764774044) internal successors, (2924), 863 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2924 transitions. [2022-01-18 15:20:58,957 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2924 transitions. Word has length 21 [2022-01-18 15:20:58,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:20:58,957 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 2924 transitions. [2022-01-18 15:20:58,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:20:58,957 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2924 transitions. [2022-01-18 15:20:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:20:58,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:20:58,958 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:20:58,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (663)] Forceful destruction successful, exit code 0 [2022-01-18 15:20:59,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 663 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2022-01-18 15:20:59,158 INFO L402 AbstractCegarLoop]: === Iteration 675 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:20:59,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:20:59,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1647378087, now seen corresponding path program 663 times [2022-01-18 15:20:59,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:20:59,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865094172] [2022-01-18 15:20:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:20:59,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:20:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:20:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:59,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:20:59,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865094172] [2022-01-18 15:20:59,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865094172] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:20:59,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929499746] [2022-01-18 15:20:59,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:20:59,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:20:59,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:20:59,264 INFO L229 MonitoredProcess]: Starting monitored process 664 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:20:59,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (664)] Waiting until timeout for monitored process [2022-01-18 15:20:59,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:20:59,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:20:59,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:20:59,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:20:59,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:59,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:20:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:59,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:20:59,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:59,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:20:59,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:59,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:20:59,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:20:59,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:20:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:20:59,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929499746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:20:59,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:20:59,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:20:59,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700889847] [2022-01-18 15:20:59,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:20:59,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:20:59,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:20:59,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:20:59,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:20:59,694 INFO L87 Difference]: Start difference. First operand 864 states and 2924 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:00,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:00,006 INFO L93 Difference]: Finished difference Result 1160 states and 3770 transitions. [2022-01-18 15:21:00,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:21:00,006 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:21:00,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:00,008 INFO L225 Difference]: With dead ends: 1160 [2022-01-18 15:21:00,008 INFO L226 Difference]: Without dead ends: 1118 [2022-01-18 15:21:00,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:21:00,008 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 86 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:00,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 158 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:00,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-01-18 15:21:00,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 860. [2022-01-18 15:21:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.388824214202561) internal successors, (2911), 859 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2911 transitions. [2022-01-18 15:21:00,018 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2911 transitions. Word has length 21 [2022-01-18 15:21:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:00,018 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 2911 transitions. [2022-01-18 15:21:00,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2911 transitions. [2022-01-18 15:21:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:21:00,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:00,019 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:00,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (664)] Ended with exit code 0 [2022-01-18 15:21:00,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2022-01-18 15:21:00,219 INFO L402 AbstractCegarLoop]: === Iteration 676 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:00,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:00,220 INFO L85 PathProgramCache]: Analyzing trace with hash 848758361, now seen corresponding path program 664 times [2022-01-18 15:21:00,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:00,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491145643] [2022-01-18 15:21:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:00,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:00,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:00,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491145643] [2022-01-18 15:21:00,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491145643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:00,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285444592] [2022-01-18 15:21:00,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:21:00,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:00,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:00,326 INFO L229 MonitoredProcess]: Starting monitored process 665 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:00,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (665)] Waiting until timeout for monitored process [2022-01-18 15:21:00,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:21:00,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:00,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:21:00,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:00,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:21:00,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:00,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:00,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:00,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:21:00,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:00,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:21:00,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:00,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:21:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:00,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285444592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:00,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:00,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:21:00,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608053960] [2022-01-18 15:21:00,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:00,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:00,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:00,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:00,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:00,706 INFO L87 Difference]: Start difference. First operand 860 states and 2911 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:01,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:01,130 INFO L93 Difference]: Finished difference Result 1179 states and 3859 transitions. [2022-01-18 15:21:01,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:21:01,130 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:21:01,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:01,132 INFO L225 Difference]: With dead ends: 1179 [2022-01-18 15:21:01,132 INFO L226 Difference]: Without dead ends: 1158 [2022-01-18 15:21:01,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:21:01,132 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:01,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 179 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:21:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-01-18 15:21:01,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 863. [2022-01-18 15:21:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.3874709976798143) internal successors, (2920), 862 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:01,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2920 transitions. [2022-01-18 15:21:01,142 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2920 transitions. Word has length 21 [2022-01-18 15:21:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:01,142 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 2920 transitions. [2022-01-18 15:21:01,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2920 transitions. [2022-01-18 15:21:01,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:21:01,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:01,143 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:01,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (665)] Ended with exit code 0 [2022-01-18 15:21:01,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 665 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2022-01-18 15:21:01,344 INFO L402 AbstractCegarLoop]: === Iteration 677 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:01,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1444864277, now seen corresponding path program 665 times [2022-01-18 15:21:01,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:01,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579885452] [2022-01-18 15:21:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:01,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:01,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:01,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579885452] [2022-01-18 15:21:01,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579885452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:01,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611035088] [2022-01-18 15:21:01,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:21:01,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:01,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:01,461 INFO L229 MonitoredProcess]: Starting monitored process 666 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:01,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (666)] Waiting until timeout for monitored process [2022-01-18 15:21:01,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:21:01,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:01,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:01,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:01,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:21:01,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:01,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:01,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:01,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:21:01,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:01,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:21:01,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:01,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:21:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:01,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611035088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:01,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:01,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:21:01,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478958691] [2022-01-18 15:21:01,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:01,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:01,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:01,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:01,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:01,995 INFO L87 Difference]: Start difference. First operand 863 states and 2920 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:02,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:02,622 INFO L93 Difference]: Finished difference Result 1288 states and 4155 transitions. [2022-01-18 15:21:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:21:02,622 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:21:02,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:02,624 INFO L225 Difference]: With dead ends: 1288 [2022-01-18 15:21:02,624 INFO L226 Difference]: Without dead ends: 1225 [2022-01-18 15:21:02,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:21:02,625 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 140 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:02,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 229 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:21:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-01-18 15:21:02,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 869. [2022-01-18 15:21:02,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.391705069124424) internal successors, (2944), 868 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2944 transitions. [2022-01-18 15:21:02,636 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2944 transitions. Word has length 21 [2022-01-18 15:21:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:02,636 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 2944 transitions. [2022-01-18 15:21:02,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2944 transitions. [2022-01-18 15:21:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:21:02,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:02,637 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:02,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (666)] Ended with exit code 0 [2022-01-18 15:21:02,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,666 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:02,837 INFO L402 AbstractCegarLoop]: === Iteration 678 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:02,837 INFO L85 PathProgramCache]: Analyzing trace with hash 952268515, now seen corresponding path program 666 times [2022-01-18 15:21:02,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:02,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079377851] [2022-01-18 15:21:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:02,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:02,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:02,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079377851] [2022-01-18 15:21:02,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079377851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:02,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498836221] [2022-01-18 15:21:02,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:21:02,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:02,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:02,946 INFO L229 MonitoredProcess]: Starting monitored process 667 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:02,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (667)] Waiting until timeout for monitored process [2022-01-18 15:21:02,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:21:02,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:02,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:21:02,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:03,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:21:03,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:03,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:03,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:03,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-18 15:21:03,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:03,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:21:03,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:03,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:21:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:03,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498836221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:03,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:03,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:21:03,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716300329] [2022-01-18 15:21:03,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:03,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:03,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:03,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:03,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:03,345 INFO L87 Difference]: Start difference. First operand 869 states and 2944 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:03,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:03,697 INFO L93 Difference]: Finished difference Result 1095 states and 3608 transitions. [2022-01-18 15:21:03,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:21:03,698 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:21:03,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:03,699 INFO L225 Difference]: With dead ends: 1095 [2022-01-18 15:21:03,699 INFO L226 Difference]: Without dead ends: 1074 [2022-01-18 15:21:03,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:21:03,700 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:03,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 167 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:03,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-01-18 15:21:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 869. [2022-01-18 15:21:03,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.391705069124424) internal successors, (2944), 868 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:03,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2944 transitions. [2022-01-18 15:21:03,710 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2944 transitions. Word has length 21 [2022-01-18 15:21:03,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:03,710 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 2944 transitions. [2022-01-18 15:21:03,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:03,710 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2944 transitions. [2022-01-18 15:21:03,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:21:03,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:03,711 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:03,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (667)] Ended with exit code 0 [2022-01-18 15:21:03,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 667 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2022-01-18 15:21:03,911 INFO L402 AbstractCegarLoop]: === Iteration 679 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:03,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:03,912 INFO L85 PathProgramCache]: Analyzing trace with hash -2125286960, now seen corresponding path program 667 times [2022-01-18 15:21:03,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:03,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767396597] [2022-01-18 15:21:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:03,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:04,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:04,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767396597] [2022-01-18 15:21:04,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767396597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:04,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321642672] [2022-01-18 15:21:04,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:21:04,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:04,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:04,005 INFO L229 MonitoredProcess]: Starting monitored process 668 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:04,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (668)] Waiting until timeout for monitored process [2022-01-18 15:21:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:04,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:21:04,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:04,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:04,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:21:04,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:21:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:04,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:04,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:04,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:21:04,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:04,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:21:04,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:04,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:21:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:04,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321642672] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:04,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:04,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-18 15:21:04,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448644334] [2022-01-18 15:21:04,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:04,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:21:04,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:04,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:21:04,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:21:04,347 INFO L87 Difference]: Start difference. First operand 869 states and 2944 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:04,857 INFO L93 Difference]: Finished difference Result 1374 states and 4445 transitions. [2022-01-18 15:21:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:21:04,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:21:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:04,859 INFO L225 Difference]: With dead ends: 1374 [2022-01-18 15:21:04,859 INFO L226 Difference]: Without dead ends: 1351 [2022-01-18 15:21:04,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:21:04,860 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 97 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:04,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 223 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:21:04,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-01-18 15:21:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 890. [2022-01-18 15:21:04,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.409448818897638) internal successors, (3031), 889 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3031 transitions. [2022-01-18 15:21:04,871 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3031 transitions. Word has length 21 [2022-01-18 15:21:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:04,871 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 3031 transitions. [2022-01-18 15:21:04,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:04,871 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3031 transitions. [2022-01-18 15:21:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:21:04,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:04,872 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:04,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (668)] Ended with exit code 0 [2022-01-18 15:21:05,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 668 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2022-01-18 15:21:05,073 INFO L402 AbstractCegarLoop]: === Iteration 680 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:05,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:05,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1522045963, now seen corresponding path program 668 times [2022-01-18 15:21:05,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:05,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798637948] [2022-01-18 15:21:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:05,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:05,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:05,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798637948] [2022-01-18 15:21:05,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798637948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:05,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418594914] [2022-01-18 15:21:05,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:21:05,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:05,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:05,176 INFO L229 MonitoredProcess]: Starting monitored process 669 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:05,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (669)] Waiting until timeout for monitored process [2022-01-18 15:21:05,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:05,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:05,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:21:05,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:05,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:05,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-01-18 15:21:05,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:21:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:05,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:05,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:05,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:21:05,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:05,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:21:05,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:05,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:21:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:05,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418594914] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:05,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:05,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-18 15:21:05,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116649900] [2022-01-18 15:21:05,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:05,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:21:05,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:05,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:21:05,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:21:05,564 INFO L87 Difference]: Start difference. First operand 890 states and 3031 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:06,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:06,073 INFO L93 Difference]: Finished difference Result 1393 states and 4527 transitions. [2022-01-18 15:21:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:21:06,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:21:06,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:06,076 INFO L225 Difference]: With dead ends: 1393 [2022-01-18 15:21:06,076 INFO L226 Difference]: Without dead ends: 1366 [2022-01-18 15:21:06,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:21:06,076 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 108 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:06,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 221 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:21:06,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2022-01-18 15:21:06,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 910. [2022-01-18 15:21:06,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.4213421342134214) internal successors, (3110), 909 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3110 transitions. [2022-01-18 15:21:06,088 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3110 transitions. Word has length 21 [2022-01-18 15:21:06,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:06,088 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 3110 transitions. [2022-01-18 15:21:06,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:06,088 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3110 transitions. [2022-01-18 15:21:06,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:21:06,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:06,089 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:06,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (669)] Ended with exit code 0 [2022-01-18 15:21:06,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,669 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:06,289 INFO L402 AbstractCegarLoop]: === Iteration 681 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:06,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:06,290 INFO L85 PathProgramCache]: Analyzing trace with hash -367436573, now seen corresponding path program 669 times [2022-01-18 15:21:06,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:06,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372239241] [2022-01-18 15:21:06,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:06,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:06,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:06,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372239241] [2022-01-18 15:21:06,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372239241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:06,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510409451] [2022-01-18 15:21:06,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:21:06,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:06,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:06,382 INFO L229 MonitoredProcess]: Starting monitored process 670 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:06,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (670)] Waiting until timeout for monitored process [2022-01-18 15:21:06,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:21:06,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:06,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:21:06,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:06,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:06,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-18 15:21:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:06,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:06,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:06,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:21:06,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:06,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:21:06,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:06,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:21:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:06,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510409451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:06,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:06,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 18 [2022-01-18 15:21:06,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324089509] [2022-01-18 15:21:06,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:06,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:21:06,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:06,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:21:06,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:21:06,687 INFO L87 Difference]: Start difference. First operand 910 states and 3110 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:06,935 INFO L93 Difference]: Finished difference Result 1144 states and 3776 transitions. [2022-01-18 15:21:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:21:06,935 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:21:06,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:06,937 INFO L225 Difference]: With dead ends: 1144 [2022-01-18 15:21:06,937 INFO L226 Difference]: Without dead ends: 1097 [2022-01-18 15:21:06,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:21:06,937 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:06,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 174 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:06,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-01-18 15:21:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 909. [2022-01-18 15:21:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 3.4030837004405288) internal successors, (3090), 908 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:06,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 3090 transitions. [2022-01-18 15:21:06,947 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 3090 transitions. Word has length 21 [2022-01-18 15:21:06,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:06,947 INFO L470 AbstractCegarLoop]: Abstraction has 909 states and 3090 transitions. [2022-01-18 15:21:06,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:06,947 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 3090 transitions. [2022-01-18 15:21:06,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:21:06,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:06,949 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:06,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (670)] Ended with exit code 0 [2022-01-18 15:21:07,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,670 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:07,149 INFO L402 AbstractCegarLoop]: === Iteration 682 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:07,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:07,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2021776806, now seen corresponding path program 670 times [2022-01-18 15:21:07,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:07,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792493224] [2022-01-18 15:21:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:07,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:07,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:07,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792493224] [2022-01-18 15:21:07,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792493224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:07,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812271309] [2022-01-18 15:21:07,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:21:07,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:07,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:07,241 INFO L229 MonitoredProcess]: Starting monitored process 671 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:07,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (671)] Waiting until timeout for monitored process [2022-01-18 15:21:07,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:21:07,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:07,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:21:07,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:07,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:07,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:07,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:07,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:07,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:21:07,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:07,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:21:07,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:07,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:21:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:07,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812271309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:07,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:07,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-18 15:21:07,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066850741] [2022-01-18 15:21:07,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:07,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:21:07,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:07,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:21:07,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:21:07,575 INFO L87 Difference]: Start difference. First operand 909 states and 3090 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:07,882 INFO L93 Difference]: Finished difference Result 1303 states and 4261 transitions. [2022-01-18 15:21:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:21:07,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:21:07,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:07,884 INFO L225 Difference]: With dead ends: 1303 [2022-01-18 15:21:07,884 INFO L226 Difference]: Without dead ends: 1284 [2022-01-18 15:21:07,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:21:07,884 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 90 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:07,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 148 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:21:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-01-18 15:21:07,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 907. [2022-01-18 15:21:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 3.405077262693157) internal successors, (3085), 906 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:07,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3085 transitions. [2022-01-18 15:21:07,904 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3085 transitions. Word has length 21 [2022-01-18 15:21:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:07,904 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 3085 transitions. [2022-01-18 15:21:07,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3085 transitions. [2022-01-18 15:21:07,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:21:07,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:07,905 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:07,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (671)] Ended with exit code 0 [2022-01-18 15:21:08,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,671 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:08,106 INFO L402 AbstractCegarLoop]: === Iteration 683 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:08,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:08,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1440718059, now seen corresponding path program 671 times [2022-01-18 15:21:08,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:08,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2597310] [2022-01-18 15:21:08,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:08,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:08,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:08,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2597310] [2022-01-18 15:21:08,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2597310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:08,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825311743] [2022-01-18 15:21:08,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:21:08,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:08,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:08,213 INFO L229 MonitoredProcess]: Starting monitored process 672 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:08,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (672)] Waiting until timeout for monitored process [2022-01-18 15:21:08,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:21:08,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:08,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 15:21:08,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:08,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:08,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:08,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:08,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:08,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:21:08,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:08,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:21:08,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:08,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:21:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:08,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825311743] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:08,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:08,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-18 15:21:08,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845910277] [2022-01-18 15:21:08,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:08,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:21:08,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:08,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:21:08,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:21:08,705 INFO L87 Difference]: Start difference. First operand 907 states and 3085 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:09,316 INFO L93 Difference]: Finished difference Result 1432 states and 4623 transitions. [2022-01-18 15:21:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:21:09,317 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:21:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:09,319 INFO L225 Difference]: With dead ends: 1432 [2022-01-18 15:21:09,319 INFO L226 Difference]: Without dead ends: 1369 [2022-01-18 15:21:09,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:21:09,319 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 115 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:09,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 272 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:21:09,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-01-18 15:21:09,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 904. [2022-01-18 15:21:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.407530454042082) internal successors, (3077), 903 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3077 transitions. [2022-01-18 15:21:09,331 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3077 transitions. Word has length 21 [2022-01-18 15:21:09,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:09,331 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 3077 transitions. [2022-01-18 15:21:09,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:09,331 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3077 transitions. [2022-01-18 15:21:09,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:21:09,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:09,332 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:09,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (672)] Ended with exit code 0 [2022-01-18 15:21:09,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,672 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:09,532 INFO L402 AbstractCegarLoop]: === Iteration 684 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:09,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:09,533 INFO L85 PathProgramCache]: Analyzing trace with hash -536687480, now seen corresponding path program 672 times [2022-01-18 15:21:09,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:09,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301122153] [2022-01-18 15:21:09,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:09,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:09,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:09,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301122153] [2022-01-18 15:21:09,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301122153] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:09,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022895437] [2022-01-18 15:21:09,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:21:09,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:09,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:09,617 INFO L229 MonitoredProcess]: Starting monitored process 673 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:09,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (673)] Waiting until timeout for monitored process [2022-01-18 15:21:09,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:21:09,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:09,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:21:09,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:09,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:09,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:09,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:09,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:09,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:21:09,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:09,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-18 15:21:09,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:09,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-18 15:21:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:09,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022895437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:09,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:09,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-18 15:21:09,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201074004] [2022-01-18 15:21:09,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:09,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:21:09,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:09,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:21:09,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:21:09,921 INFO L87 Difference]: Start difference. First operand 904 states and 3077 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:10,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:10,395 INFO L93 Difference]: Finished difference Result 1364 states and 4410 transitions. [2022-01-18 15:21:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:21:10,395 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:21:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:10,397 INFO L225 Difference]: With dead ends: 1364 [2022-01-18 15:21:10,397 INFO L226 Difference]: Without dead ends: 1345 [2022-01-18 15:21:10,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:21:10,397 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 92 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:10,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 291 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:21:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-01-18 15:21:10,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 888. [2022-01-18 15:21:10,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.400225479143179) internal successors, (3016), 887 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3016 transitions. [2022-01-18 15:21:10,409 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3016 transitions. Word has length 21 [2022-01-18 15:21:10,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:10,409 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 3016 transitions. [2022-01-18 15:21:10,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3016 transitions. [2022-01-18 15:21:10,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:21:10,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:10,410 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:10,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (673)] Ended with exit code 0 [2022-01-18 15:21:10,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 673 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2022-01-18 15:21:10,611 INFO L402 AbstractCegarLoop]: === Iteration 685 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:10,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:10,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1517493109, now seen corresponding path program 673 times [2022-01-18 15:21:10,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:10,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321146827] [2022-01-18 15:21:10,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:10,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:10,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:10,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321146827] [2022-01-18 15:21:10,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321146827] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:10,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113320593] [2022-01-18 15:21:10,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:21:10,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:10,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:10,702 INFO L229 MonitoredProcess]: Starting monitored process 674 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:10,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (674)] Waiting until timeout for monitored process [2022-01-18 15:21:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:10,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:21:10,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:10,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:10,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:10,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:10,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:10,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-18 15:21:10,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:10,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:21:10,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:10,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:21:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:11,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113320593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:11,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:11,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-18 15:21:11,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795558265] [2022-01-18 15:21:11,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:11,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:21:11,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:11,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:21:11,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:21:11,017 INFO L87 Difference]: Start difference. First operand 888 states and 3016 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:11,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:11,487 INFO L93 Difference]: Finished difference Result 1502 states and 4825 transitions. [2022-01-18 15:21:11,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:21:11,487 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:21:11,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:11,490 INFO L225 Difference]: With dead ends: 1502 [2022-01-18 15:21:11,490 INFO L226 Difference]: Without dead ends: 1481 [2022-01-18 15:21:11,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:21:11,490 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:11,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 271 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:21:11,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2022-01-18 15:21:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 886. [2022-01-18 15:21:11,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4101694915254237) internal successors, (3018), 885 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3018 transitions. [2022-01-18 15:21:11,502 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3018 transitions. Word has length 21 [2022-01-18 15:21:11,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:11,502 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 3018 transitions. [2022-01-18 15:21:11,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:11,502 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3018 transitions. [2022-01-18 15:21:11,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:21:11,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:11,504 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:11,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (674)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:11,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2022-01-18 15:21:11,704 INFO L402 AbstractCegarLoop]: === Iteration 686 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:11,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:11,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1117504789, now seen corresponding path program 674 times [2022-01-18 15:21:11,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:11,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453497087] [2022-01-18 15:21:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:11,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:11,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:11,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453497087] [2022-01-18 15:21:11,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453497087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:11,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750304959] [2022-01-18 15:21:11,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:21:11,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:11,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:11,792 INFO L229 MonitoredProcess]: Starting monitored process 675 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:11,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (675)] Waiting until timeout for monitored process [2022-01-18 15:21:11,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:21:11,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:11,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:21:11,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:21:11,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:21:11,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-18 15:21:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:11,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:21:12,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:12,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-18 15:21:12,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:12,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-18 15:21:12,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:21:12,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-18 15:21:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:12,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750304959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:21:12,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:21:12,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-18 15:21:12,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024309509] [2022-01-18 15:21:12,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:21:12,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:21:12,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:21:12,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:21:12,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:21:12,162 INFO L87 Difference]: Start difference. First operand 886 states and 3018 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:12,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:21:12,441 INFO L93 Difference]: Finished difference Result 1152 states and 3841 transitions. [2022-01-18 15:21:12,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:21:12,441 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:21:12,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:21:12,443 INFO L225 Difference]: With dead ends: 1152 [2022-01-18 15:21:12,443 INFO L226 Difference]: Without dead ends: 1131 [2022-01-18 15:21:12,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:21:12,443 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:21:12,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 150 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 459 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-01-18 15:21:12,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-01-18 15:21:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 891. [2022-01-18 15:21:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.4134831460674158) internal successors, (3038), 890 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3038 transitions. [2022-01-18 15:21:12,453 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3038 transitions. Word has length 21 [2022-01-18 15:21:12,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:21:12,453 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 3038 transitions. [2022-01-18 15:21:12,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:21:12,453 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3038 transitions. [2022-01-18 15:21:12,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:21:12,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:21:12,454 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:21:12,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (675)] Ended with exit code 0 [2022-01-18 15:21:12,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable685,675 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:12,655 INFO L402 AbstractCegarLoop]: === Iteration 687 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 15:21:12,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:21:12,655 INFO L85 PathProgramCache]: Analyzing trace with hash 340620533, now seen corresponding path program 675 times [2022-01-18 15:21:12,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:21:12,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255079485] [2022-01-18 15:21:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:21:12,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:21:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:21:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:21:12,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:21:12,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255079485] [2022-01-18 15:21:12,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255079485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:21:12,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817102406] [2022-01-18 15:21:12,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:21:12,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:21:12,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:21:12,744 INFO L229 MonitoredProcess]: Starting monitored process 676 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:21:12,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (676)] Waiting until timeout for monitored process [2022-01-18 15:21:12,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:21:12,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:21:12,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:21:12,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2022-01-18 15:21:12,854 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 15:21:12,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (676)] Forceful destruction successful, exit code 0 [2022-01-18 15:21:12,887 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 15:21:12,895 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (676)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 15:21:13,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2022-01-18 15:21:13,055 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 12 known predicates. [2022-01-18 15:21:13,056 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 15:21:13,056 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 15:21:13,056 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 15:21:13,059 INFO L732 BasicCegarLoop]: Path program histogram: [675, 6, 3, 2, 1] [2022-01-18 15:21:13,061 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 15:21:13,061 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 15:21:13,063 INFO L202 PluginConnector]: Adding new model chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 03:21:13 BasicIcfg [2022-01-18 15:21:13,063 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 15:21:13,063 INFO L158 Benchmark]: Toolchain (without parser) took 795864.64ms. Allocated memory was 367.0MB in the beginning and 539.0MB in the end (delta: 172.0MB). Free memory was 327.4MB in the beginning and 226.3MB in the end (delta: 101.1MB). Peak memory consumption was 275.9MB. Max. memory is 16.0GB. [2022-01-18 15:21:13,063 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 367.0MB. Free memory is still 328.6MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:21:13,063 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.82ms. Allocated memory is still 367.0MB. Free memory was 327.3MB in the beginning and 325.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 15:21:13,063 INFO L158 Benchmark]: Boogie Preprocessor took 19.39ms. Allocated memory is still 367.0MB. Free memory was 325.7MB in the beginning and 324.7MB in the end (delta: 973.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 15:21:13,063 INFO L158 Benchmark]: RCFGBuilder took 330.79ms. Allocated memory is still 367.0MB. Free memory was 324.7MB in the beginning and 312.9MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 15:21:13,064 INFO L158 Benchmark]: TraceAbstraction took 795463.48ms. Allocated memory was 367.0MB in the beginning and 539.0MB in the end (delta: 172.0MB). Free memory was 312.3MB in the beginning and 226.3MB in the end (delta: 86.0MB). Peak memory consumption was 259.1MB. Max. memory is 16.0GB. [2022-01-18 15:21:13,064 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13ms. Allocated memory is still 367.0MB. Free memory is still 328.6MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 33.82ms. Allocated memory is still 367.0MB. Free memory was 327.3MB in the beginning and 325.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 19.39ms. Allocated memory is still 367.0MB. Free memory was 325.7MB in the beginning and 324.7MB in the end (delta: 973.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 330.79ms. Allocated memory is still 367.0MB. Free memory was 324.7MB in the beginning and 312.9MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 795463.48ms. Allocated memory was 367.0MB in the beginning and 539.0MB in the end (delta: 172.0MB). Free memory was 312.3MB in the beginning and 226.3MB in the end (delta: 86.0MB). Peak memory consumption was 259.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 12 known predicates. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 12 known predicates. - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 12 known predicates. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 12 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 795.3s, OverallIterations: 687, TraceHistogramMax: 2, PathProgramHistogramMax: 675, EmptinessCheckTime: 0.5s, AutomataDifference: 252.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 52436 SdHoareTripleChecker+Valid, 157.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 52436 mSDsluCounter, 137434 SdHoareTripleChecker+Invalid, 130.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 46843 IncrementalHoareTripleChecker+Unchecked, 253555 mSDsCounter, 19518 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 416889 IncrementalHoareTripleChecker+Invalid, 483250 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19518 mSolverCounterUnsat, 13729 mSDtfsCounter, 416889 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 38134 GetRequests, 17482 SyntacticMatches, 3271 SemanticMatches, 17381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133347 ImplicationChecksByTransitivity, 223.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=910occurred in iteration=680, InterpolantAutomatonStates: 10548, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.4s AutomataMinimizationTime, 686 MinimizatonAttempts, 166917 StatesRemovedByMinimization, 682 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.5s SsaConstructionTime, 6.3s SatisfiabilityAnalysisTime, 378.3s InterpolantComputationTime, 28015 NumberOfCodeBlocks, 28015 NumberOfCodeBlocksAsserted, 2011 NumberOfCheckSat, 39878 ConstructedInterpolants, 1984 QuantifiedInterpolants, 407573 SizeOfPredicates, 10814 NumberOfNonLiveVariables, 57513 ConjunctsInSsa, 13349 ConjunctsInUnsatCore, 2034 InterpolantComputations, 12 PerfectInterpolantSequences, 983/8585 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown